FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
[See Section 10 and Rule 13]
TITLE: “A SHIFT TOWER FOR A MANUAL TRANSMISSION UNIT OF A
VEHICLE”
Name and Address of the Applicant: TATA MOTORS LIMITED; Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India.
Nationality: Indian
The following specification describes the nature of invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure in general relates to a field of automobile engineering. Particularly but not exclusively, the present disclosure relates to a manual transmission unit of a vehicle. Further, embodiments of the disclosure discloses a shift tower for the manual transmission unit of the vehicle.
BACKGROUND OF THE DISCLOSURE
Generally, automobiles are equipped with a power train assembly for transmitting power generated by a prime mover i.e. engine or an electric motor to the wheels of the vehicle. The power train assembly, may comprise a clutch system to facilitate engagement and disengagement of gears to control the power or torque transferred to the wheels, and a transmission or gear box comprising a plurality of gears of different gear ratios, in order to serve the needs of power requirement at various power bands of the vehicle. Further, the power train assembly includes various moving parts like propeller shafts, differential assemblies and wheel axles. Among all the components in the power train assembly, the transmission or gearbox plays a vital role in catering to required torque during various operating conditions of the vehicle. Generally, vehicles may be equipped with different types of transmission including, but not limiting to manual transmission, automatic transmission and semi-automatic transmission to deliver wide range of torque values based on the requirement. In manual transmission, based on the requirement, operators may shift the gears (i.e. from first gear to second gear, second to third or vice-versa and the like), to obtain required power band for the vehicle.
Generally, manual transmission units includes a shift tower which will be operated by a gear lever, which is positioned in a cabin of the vehicle. The shift tower is configured to select and shift gears corresponding to operation of the gear lever. In conventional shift towers, a shift lever is rigidly connected to a selector shaft by welding, riveting, threading and the like. With this configuration, during gear selection, where the selector shaft is moved linearly by a selection lever, the shift lever carrying shift masses will also linearly move along with the selector shaft. Due to linear movement of the shift lever along with the selector shaft, more effort is required to select gear, thereby causing inconvenience to the operator, which is undesired. Further, due to such rigid connection, vibrations from the gearbox or engine

directly gets transferred to the shift lever and then onto the gear lever, which is again
undesired.
The present disclosure is directed to overcome one or more limitations stated above and any
other limitations associated with the prior arts.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of conventional system are overcome, and additional advantages are provided through the provision of shift tower as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In one non-limiting embodiment of the disclosure, a shift tower for a manual transmission unit of a vehicle is disclosed. The shift tower includes a housing and a shift lever removably connected to the housing. The shift tower is configured to rotate on the housing and comprising a first sleeve, where the first sleeve is configured to rotate along with rotation of the shift lever. Further the shift tower includes a selector shaft movably disposed in the housing and protruding through the shift lever and the first sleeve. Furthermore, the shift tower includes a selection lever pivotally coupled to the housing and a second sleeve slidably coupled to an outer surface of the first sleeve and connected to an end of the selector shaft and the selection lever. The second sleeve is configured to slide along the outer surface of the first sleeve to vertically displace the selector shaft, in response to actuation of the selection lever for gear selection, and rotates along with rotation of the first sleeve for rotating the selector shaft, in response to rotation of the shift lever for gear shifting.
In an embodiment of the disclosure, the first sleeve is defined with a plurality of slots and the second sleeve is defined with a plurality of protrusions. The plurality of slots receives the plurality of protrusions for slidably coupling the first sleeve and the second sleeve.
In an embodiment of the disclosure, the plurality of slots are dimensioned to be larger than the plurality of protrusions to provide clearance at one side of mating surfaces of the plurality of protrusions with the plurality of slots.
In an embodiment of the disclosure, the shift tower includes a shift finger coupled to the selector shaft and configured to displace along with displacement of the selector shaft.

In an embodiment of the disclosure, the shift tower includes a plurality of masses positioned on the shift lever.
In an embodiment of the disclosure, the shift tower includes a detent pin coupled to the housing and a shift ramp coupled to the shift lever and in contact with the detent pin. The detent pin exerts force onto the shift ramp to prevent free play of the shift lever.
In another non-limiting embodiment of the disclosure, a shift tower for a manual transmission unit of a vehicle is disclosed. The shift tower a housing and a shift lever removably connected to the housing. The shift tower is configured to rotate on the housing and comprising a first sleeve, where the first sleeve is configured to rotate along with rotation of the shift lever. Further the shift tower includes a shift ramp coupled to the shift lever and being contacted by the detent pin. Furthermore, the shift tower includes a selector shaft movably disposed in the housing and protruding through the shift lever and the first sleeve. Additionally, the shift tower includes a selection lever pivotally coupled to the housing and a second sleeve slidably coupled to an outer surface of the first sleeve and connected to an end of the selector shaft and the selection lever. The second sleeve is configured to slide along the outer surface of the first sleeve to vertically displace the selector shaft, in response to actuation of the selection lever for gear selection, and rotates along with rotation of the first sleeve for rotating the selector shaft, in response to rotation of the shift lever for gear shifting.
In yet another non-limiting embodiment of the present disclosure, gear shifting system for a manual transmission unit of a vehicle is disclosed. The gear shifting system includes a ger lever operably disposed in a cabin of the vehicle and a shift tower disposed on a gearbox of the vehicle and coupled to the gear lever. The shift tower is configured to select and shift gears in response to operation of the gear lever. The shift tower includes The shift tower includes a housing and a shift lever removably connected to the housing. The shift tower is configured to rotate on the housing and comprising a first sleeve, where the first sleeve is configured to rotate along with rotation of the shift lever. Further the shift tower includes a selector shaft movably disposed in the housing and protruding through the shift lever and the first sleeve. Furthermore, the shift tower includes a selection lever pivotally coupled to the housing and a second sleeve slidably coupled to an outer surface of the first sleeve and connected to an end of the selector shaft and the selection lever. The second sleeve is configured to slide along the outer surface of the first sleeve to vertically displace the selector

shaft, in response to actuation of the selection lever for gear selection, and rotates along with rotation of the first sleeve for rotating the selector shaft, in response to rotation of the shift lever for gear shifting.
It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:
Figure. 1 illustrates a perspective view of a gear shifting system for a manual transmission unit of a vehicle, in accordance with a first embodiment of the present disclosure.
Figure. 2 illustrates a perspective view of a shift tower of the gear shifting system, in accordance with an exemplary embodiment of the present disclosure.
Figure. 3 illustrates an exploded view of the shift tower of Figure. 1.
Figures. 4a-4c illustrates sectional view of the shift tower depicting various positions during gear selection, in accordance with an exemplary embodiment of the present disclosure.
Figures. 5a-5c illustrates a top sectional view of the shift tower depicting various positions of a first sleeve and a second sleeve during gear shifting, in accordance with an exemplary embodiment of the present disclosure.

Figures. 6 illustrates a perspective view of a gear shifting system for a manual transmission unit of a vehicle, in accordance with a second embodiment of the present disclosure.
Figures. 7a to 7c, illustrates a illustrates a top sectional view of the shift tower depicting various positions of a shift ramp, during gear shifting, in accordance with the second embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular form disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify various constructions of the shift tower, which may vary from transmission to transmission. However, such modifications should be construed within the scope of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure, so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.
The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such assembly. In other words, one or more elements in the assembly proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the assembly.

The following paragraphs describe the present disclosure with reference to Figures. 1 to 6. In the Figures, the same element or elements which have similar functions are indicated by the same reference signs. In the figures, vehicle is not illustrated for the purpose of simplicity.
Figure. 1, illustrates a perspective view of a gear shifting system (100) for a manual transmission unit of a vehicle [not shown in Figures]. The gear shifting system (100) may include a gear lever (101) which may be disposed in a cabin of the vehicle. The gear lever (101) may be operated by an operator to change gears of the vehicle. Further, the gear shifting system includes a shift tower (104) disposed on a gearbox (103) of the vehicle and may be coupled to the gear lever (101). In an embodiment, the shift tower (104) may be coupled to the gear lever (101) through but not limiting to cables (102). The shift tower (104) may be configured to select and shift gears in response to operation of the gear lever (101) by the operator.
Turning now to Figure. 2, which illustrates a perspective view of the shift tower (104). The shift tower (104) includes a housing (105), which may support various parts of the shift tower (104). Further, the shift tower (104) may include a shift lever (106) which may be removably connected to the housing (105), and may be rotated on the housing (105). In an embodiment, the shift lever (106) may include a plurality of masses (116). The plurality of masses (116) increases inertia of the shift lever (106) while gear shifting and reduce double bump force (i.e., jerk on gear shift knob during gear shifting). The shift lever (106) may include a first sleeve (109) which may extend from a substantially central portion of the shift lever (106). In an embodiment, the first sleeve (109) may be an external member which may be couped to the shift lever (106) through joining processes such as welding, brazing and the like or may be an integral part of the shift lever (106). In another embodiment, as apparent from Figure. 3, the first sleeve (109) may be defined with a plurality of slots (111) on its outer surface. Further, the shift tower (104) may include a selector shaft (107) which may be movably disposed in the housing (105) and may protrude through the shift lever (106) and the first sleeve (109). The selector shaft (107) may include a shift finger (113) which may be configured to displace along with the selector shaft (107) to facilitate selection and shifting of gears.
Referring further to Figures. 2 and 3, the shift tower (104) may include a selection lever (108) which may be pivotally coupled to the housing (105). Further, the shift tower (104) may include a second sleeve (110) which may be slidably coupled to an outer surface of the first sleeve (109) and connected to an end of the selector shaft (107) and the selection lever (108).

In other words, the second sleeve (110) may be connected to an end of the selector shaft (107) to support the selector shaft (107) and facilitate movement (i.e., linear displacement and rotation) of the selector shaft (107) to select and shift the gears. In an embodiment, the second sleeve (110) may be defined with a plurality of protrusions (112) [as seen in Figure. 5a] on its inner surface and the plurality of protrusions (112) engage with the plurality of slots (111) on the first sleeve (109) to facilitate sliding of the second sleeve (110) on the first sleeve (108). As seen in Figures. 4a-4c, the second sleeve (110) may slide along the outer surface of the first sleeve (109), corresponding to actuation of the selection lever (108) for selecting the gears, and rotate along with rotation of the first sleeve (109) [as seen in Figures. 5a-5c] corresponding to actuation of the shift lever (106) for shifting the gears.
Referring now to Figure. 5a, the plurality of slots (111) of the first sleeve (109) may be dimensioned to be larger than the plurality of plurality of protrusions (112) of the second sleeve (110). This configuration aids in providing clearance or gap (G) between mating surfaces (117) or on one side of mating surfaces (117) of the plurality of protrusions (112) with the plurality of slots (111), depending on gear shifted [best seen in Figures. 5a-5c]. The clearance or the gap (G) aids in mitigating vibrations from transferring to the shift lever (106) and ultimately to the gear lever (101). This improves comfort to the operator during driving of the vehicle.
Turning back to Figure. 1, the shift tower (104) may include detent pin (114) which may be coupled to the housing (105) and a shift ramp (115) coupled to the shift lever (106). The detent pin (114) may contact and exert force onto the shift ramp (115) to prevent free play of the shift lever (106), thus mitigating vibrations or inadvertent movement of the transmission components, which results in convenient driving experience to the operator.
In an operational embodiment, to change the gear, the user may operate the gear lever (101). As seen in Figure. 4a, which depicts position of the second sleeve (110) on the first sleeve (109) when gear is in neutral, 3rd or 4th gate, and Figure. 5a depicts position of slots (111) and protrusion of the first sleeve (109) and the second sleeve (110), when the gear is in neutral. In order to select 1st gear, upon operation of the gear lever (101), the second sleeve (110) may slide on the first sleeve (109) in a downward direction [as seen in Figure. 4c], displacing the selector shaft (107) downwardly, independent to the shift lever (106). This aids in easy gear selection without need of much efforts from the operator. Further to shift to the first gear, the first sleeve (109) [thus, the second sleeve (110)] may rotate in an anti-clockwise direction [as

seen in Figure. 5b] to rotate the selector shaft (107). During rotation of the first sleeve (109) and the second sleeve (110), the protrusions (112) engage one of the mating surface (117) of the slots (111) and creating the gap (G) on the other mating surface (117) of the slot. This aids in mitigating transfer of vibrations from engine or gearbox (103) onto the gear lever (101). Similarly, when selecting 5th gear or reverse gear, the second sleeve (110) may slide on the first sleeve (109) in an upward direction [as seen in Figure. 4b], displacing the selector shaft (107) upwardly, independent to the shift lever (106). This aids in easy gear selection without need of much efforts from the operator, as the shift lever (106) carrying masses does not displace along with the displacement of the selector shaft (107). Further to shift to the first gear, the first sleeve (109) [thus, the second sleeve (110)] may rotate in a clockwise direction to rotate the selector shaft (107). During rotation of the first sleeve (109) and the second sleeve (110), the protrusions (112) engage one of the mating surface (117) of the slots (111) and creating the gap (G) on the other mating surface (117) of the slot. This aids in mitigating transfer of vibrations from engine or gearbox (103) onto the gear lever (101).
In an embodiment, the configuration of the selector shaft (107) shaft aids in displacement of the selector shaft (107) independently without need of movement of the shift lever (106), like the conventional art. Thus, effort of the operator to select the gear is reduced, which improves comfort of the operator during driving of the vehicle.
Referring to Figure. 6, which illustrates a perspective view of the shift tower (204) in accordance to a second embodiment of the present disclosure. The shift tower (204) having the same configuration as that of the shift tower (204) described in the first embodiment, also include a shift ramp (215) which may be coupled to the shift lever (106). Further, the shift tower (104) may include a detent pin (214) coupled to the housing (105) and configured to be in contact with the shift ramp (215). The detent pin (214) may exert force on to the shift ramp (115) coupled to the shift lever (106), in order to hold the shift lever (106) intact and to avoid free play of the shift lever (106) due to the gap (G) between the slots (111) of the first sleeve (109) and the protrusions (212) of the second sleeve (110). As seen in Figures. 7a to 7c, in an embodiment, the shift ramp (215) may include a pair of tapered surfaces (217) and a groove (216) defined between the pair of tapered surfaces (217). The detent pin (214) may continuously exert force on to the shift ramp (215) [thus, the shift lever (106)] by traversing on the pair of tapered surfaces (217) and the groove (216) depending on rotational position of the shift lever (106) corresponding to gear to be shifted. As an example, the detent pin (214)

may contact groove (216) portion of the shift ramp (215) during neutral and may contact with one of the tapered surface (217) when the gear is shift to one of first to fifth or reverse gear. Thus, the detent pin (214) and shift ramp (215) aids mitigating free play of the shift lever (106).
Equivalents:
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to "at least one of A, B, and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, and C" would include but not be limited to systems that

have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to "at least one of A, B, or C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals:
Referral numeral Description
100 Gear shifting system
101 Gear lever
102 Cables
103 Gearbox
104, 204 Shift tower
105 Housing
106, 206 Shift lever
107 Selector shaft
108 Selection lever
109 First sleeve
110 Second sleeve
111 Slots
112, 212 Protrusions
113 Shift finger
114, 214 Detent pin
115, 215 Shift ramp
G Gap
116 Masses
216 Groove
217 Tapered surface

We Claim:
1. A shift tower (104) for a manual transmission unit of a vehicle, the shift tower (104)
comprising:
a housing (105);
a shift lever (106) removably connected to the housing (105) and configured to rotate on the housing (105) and comprising a first sleeve (109), wherein the first sleeve (109) is configured to rotate along with rotation of the shift lever (106);
a selector shaft (107) movably disposed in the housing (105) and protruding through the shift lever (106) and the first sleeve (109);
a selection lever (108) pivotally coupled to the housing (105); and
a second sleeve (110) slidably coupled to an outer surface of the first sleeve (109) and connected to an end of the selector shaft (107) and the selection lever (108) such that, the second sleeve (110) is configured to slide along the outer surface of the first sleeve (109) to vertically displace the selector shaft (107), in response to actuation of the selection lever (108) for gear selection, and rotates along with rotation of the first sleeve (109) for rotating the selector shaft (107), in response to rotation of the shift lever (106) for gear shifting.
2. The shift tower (104) as claimed in claimed in claim 1, wherein the first sleeve (109) is defined with a plurality of slots (111) and the second sleeve (110) is defined with a plurality of protrusions (112), wherein the plurality of slots (111) receives the plurality of protrusions (112) for slidably coupling the first sleeve (109) and the second sleeve (110).
3. The shift tower (104) as claimed in claim 2, wherein the plurality of slots (111) are dimensioned to be larger than the plurality of protrusions (112) to provide clearance at one side of mating surfaces (117) of the plurality of protrusions (112) with the plurality of slots (111).
4. The shift tower (104) as claimed in claim 1, comprising a shift finger (113) coupled to the selector shaft (107) and configured to displace along with displacement of the selector shaft (107).

5. The shift tower (104) as claimed in claim 1, comprising a plurality of masses positioned on the shift lever (106).
6. The shift tower (104) as claimed in claim 1, comprising a detent pin (114) coupled to the housing (105).
7. The shift tower (104) as claimed in claims 1 and 6, comprising a shift ramp (115) coupled to the shift lever (106) and in contact with the detent pin (114), wherein the detent pin (114) exerts force onto the shift ramp (115) to prevent free play of the shift lever (106).
8. A shift tower (204) for a manual transmission unit of a vehicle, the shift tower (204) comprising:
a housing (105);
a detent pin (214) coupled to the housing (105);
a shift lever (106) rotatably disposed on the housing (105) and comprising a first sleeve (109) and, wherein the first sleeve (109) is configured to rotate along with rotation of the shift lever (106);
a shift ramp (215) coupled to the shift lever (106) and being contacted by the detent pin (214);
a selector shaft (107) movably disposed in the housing (105) and protruding through the shift lever (106) and the first sleeve (109);
a selection lever (108) pivotally coupled to the housing (105); and
a second sleeve (110) slidably coupled to an outer surface of the first sleeve (109) and connected to an end of the selector shaft (107) and the selection lever (108) such that, the second sleeve (110) is configured to slide along the outer surface of the first sleeve (109) to vertically displace the selector shaft (107), in response to actuation of the selection lever (108) for gear selection, and rotate along with rotation of the first sleeve (109) for rotating the selector shaft (107), in response to rotation of the shift lever (106) for gear shifting.
9. The shift tower (104) as claimed in claim 8, wherein the shift ramp (215) comprises a
pair of tapered surfaces and a groove (216) defined between the pair of tapered
surfaces (217), wherein the detent pin (114) contacts at least one of the pair of tapered

surfaces and the groove to exert force onto the shift ramp (115) to prevent free play of the shift lever (106).
10. The shift tower (104) as claimed in claimed in claim 8, wherein the first sleeve (109) is defined with a plurality of protrusions (112) on an inner surface and the second sleeve (110) is defined with a plurality of slots (111), wherein the plurality of slots (111) receives the plurality of protrusions (112) for slidably coupling the first sleeve (109) and the second sleeve (110).
11. The shift tower (104) as claimed in claim 10, wherein each of the plurality of slots (111) are dimensioned to be larger than the plurality of protrusions (112) to maintain a gap (G) at one side of mating surfaces (117) of the plurality of protrusions (112) with the plurality of slots (111).
12. A gear shifting system (100) for a manual transmission unit of a vehicle, the system comprising:
a gear lever (101) operably disposed in a cabin of the vehicle;
a shift tower (104, 204) disposed on a gearbox (103) of the vehicle and coupled to the gear lever (101), wherein the shift tower (104, 204) is configured to select and shift gears in response to operation of the gear lever (101), the shift tower (104) comprising:
a housing (105);
a shift lever (106) rotatably disposed on the housing (105) and coupled to the gear lever (101) through a first cable, wherein the shift lever (106) comprises a first sleeve (109) configured to rotate along with rotation of the shift lever (106);
a selector shaft (107) movably disposed in the housing (105) and protruding through the shift lever (106) and the first sleeve (109);
a selection lever (108) pivotally coupled to the housing (105) and coupled to the gear lever (101) through a second cable; and
a second sleeve (110) slidably coupled to an outer surface of the first sleeve (109) and connected to an end of the selector shaft (107) and the selection lever (108) such that, the second sleeve (110) is configured to slide along the outer surface of the first sleeve (109) to vertically displace the selector shaft (107), in response to actuation of the selection lever (108) by

operation of the gear lever (101) in the first direction for gear selection, and rotate along with rotation of the first sleeve (109) for rotating the selector shaft (107), in response to rotation of the shift lever (106) by operation of the gear lever (101) in the second direction for gear shifting.
13. A vehicle comprising a manual transmission unit and a gear shifting system (100) as claimed in claim 12 for shifting gears in the manual transmission unit.