GM Service Manual Online
For 1990-2009 cars only

Gearshift Mechanism


Object Number: 179926  Size: LH
(1)Gearshift Control Lever Knob
(2)Gearshift Control Lever
(3)Gearshift Control Lever Upper Boot
(4)Gearshift Control Lever Lower Boot
(5)Gearshift Control Lever Snap Ring
(6)Gearshift Control Lever Shim
(7)Gearshift Control Lever Upper Seat
(8)Gearshift Control Lever Lower Seat
(9)Gearshift Control Lever Boot Cover
(10)Gearshift Control Lever Housing Dust Cover
(11)Gearshift Control Shaft Housing Nut
(12)Gearshift Control Lever Housing
(13)Gearshift Control Lever Guide Plate
(14)Gearshift Control Lever Housing to Guide Plate Washer
(15)Gearshift Control Lever Housing to Guide Plate Nut
(16)Extension Rod
(17)Gearshift Control Lever Guide Plate Bolt
(18)Gearshift Control Shaft Rear Boot
(19)Gearshift Control Shaft Rear Boot
(20)Gearshift Control Shaft Rear Through Bolt and Nut
(21)Gearshift Control Shaft Joint O-Ring
(22)Gearshift Control Shaft Bushing
(23)Gearshift Control Shaft Joint O-Ring
(24)Gearshift Control Shaft Rear Washer
(25)Gearshift Control Shaft Outer Bushing
(26)Gearshift Control Shaft Inner Bushing
(27)Gearshift Control Shaft Front Through Bolt Nut
(28)Gearshift Control Shaft Front Through Bolt Washer
(29)Gearshift Control Joint Through Bolt and Nut
(30)Gearshift Control Shaft Joint
(31)Gearshift Control Shaft Joint O-Ring
(32)Gearshift Control Shaft Bushing
(33)Gearshift Control Shaft Joint O-Ring
(34)Gearshift Control Joint Through Bolt
(35)Gearshift Control Joint Through Bolt Washer
(36)Gearshift Control Shaft Outer Bushing
(37)Gearshift Control Shaft Inner Bushing
(38)Extension Rod Mounting Stud Washer
(39)Extension Rod Mounting Stud
(40)Extension Rod Spacer
(41)Extension Rod Bushing
(42)Extension Rod Retaining Washer
(43)Extension Rod Retaining Washer
(44)Extension Rod Retaining Nut

Object Number: 167997  Size: SH

Gear selection begins in the gearshift control lever (1). The gearshift control shaft transmits gear selection from the gearshift control lever to the transaxle. The gearshift control shaft joint connects the gearshift control shaft to the transaxle gearshift shaft.

Gearshift and Select Shaft Assembly


Object Number: 179930  Size: MH
(1)Reverse Gearshift Arm
(2)Reverse Gearshift Lever
(3)5th and Reverse Gearshift Guide Shaft
(4)5th and Reverse Gearshift Shaft
(5)High Speed Gearshift Shaft
(6)Low Speed Gearshift Shaft
(7)Gearshift and Select Lever
(8)5th and Reverse Gearshift Cam
(9)5th and Reverse Interlock Guide Bolt
(10)Gearshift Guide Case
(11)Gearshift Interlock Plate
(12)Gearshift Interlock Bolt
(13)Gearshift Yoke
(14)Transaxle Gearshift Shaft
(15)Gearshift Arm
(16)Gearshift and Select Shaft

An arm (15) and a yoke (13) to the gearshift and to the select shaft assembly transmit the transaxle gearshift shaft (14) movement.This happens when the transaxle gearshift shaft performs the following movements:

    • The transaxle gearshift shaft moves in.
    • The transaxle gearshift shaft moves out.
    • The transaxle gearshift shaft turns.

The gearshift and the select shaft assembly actuate each shift shaft and each fork for the desired transaxle gearshift. A gearshift interlock plate (11) prevents 2 different gears from engaging during shifting.