GM Service Manual Online
For 1990-2009 cars only

The low speed synchronizer is mounted on the main shaft and will engage with either the main shaft first or the main shaft second gear. The high speed synchronizer is also mounted on the main shaft and will engage with either the main shaft third or the input shaft fourth gear. The reverse synchronizer is mounted on the main shaft and engages with the main shaft fifth or the main shaft reverse gear. The countershaft meshes with the main shaft to produce the appropriate gear ratio output.

Internal Gear Components


Object Number: 167976  Size: LF
(1)Speedometer Driven Gear Case Retaining Bolt
(2)Speedometer Driven Gear Case
(3)Speedometer Driven Gear Case O-Ring
(4)Speedometer Driven Gear Roll Pin
(5)Speedometer Driven Gear
(6)Speedometer Driven Gear Lip Seal
(7)Oil Seal
(8)Main Shaft Rear Bearing C-Clip
(8)Main Shaft Rear Bearing C-Clip
(9)Speedometer Drive Gear
(10)Main Shaft Rear Bearing
(11)Main Shaft Fifth Gear Washer
(12)Main Shaft Needle Bearing
(13)Main Shaft Fifth Gear
(14)High Speed And Reverse Hub C-Clip
(14)High Speed And Reverse Hub C-Clip
(15)High Speed Synchronizer Ring
(16)Reverse Synchronizer Sleeve
(17)Low Speed Synchronizer Spring
(17)Low Speed Synchronizer Spring
(18)Synchronizer Key
(18)Synchronizer Key
(18)Synchronizer Key
(19)Reverse Synchronizer Hub
(20)Main Shaft Reverse Gear
(21)Main Shaft Reverse Gear Needle Bearing
(22)Main Shaft Reverse Gear Bushing
(23)Main Shaft Bearing Washer
(24)Main Shaft Center Bearing
(25)Main Shaft Bearing Washer
(26)Main Shaft Center Bearing C-Ring
(27)Main Shaft First Gear
(28)Main Shaft First Gear Needle Bearing
(29)Main Shaft First Gear Bushing
(30)Low Speed Synchronizer Ring
(31)Low Speed Synchronizer Sleeve
(32)Low Speed Synchronizer Spring
(32)Low Speed Synchronizer Spring
(33)Low Speed Synchronizer Hub
(34)Low Speed Synchronizer Ring
(35)Main Shaft Second Gear
(36)Main Shaft Second Gear Needle Bearing
(37)Main Shaft
(38)Main Shaft Washer Ball
(39)Main Shaft Third Gear
(40)High Speed Synchronizer Spring
(41)Main Shaft Third Gear Needle Bearing
(42)High Speed Synchronizer Sleeve
(43)High Speed Synchronizer Spring
(43)High Speed Synchronizer Spring
(44)High Speed Synchronizer Hub
(45)Input Shaft Needle Bearing
(46)Input Shaft Fourth Gear
(47)Input Shaft
(48)Front Input Shaft Bearing
(49)Front Input Shaft Bearing C-Clip
(50)Front Input Shaft Oil Seal
(51)Front Input Shaft Bearing C-Ring
(52)Front Countershaft Bearing C-Clip
(53)Front Countershaft Bearing
(54)Friction Gear Snap Ring
(55)Center Gear Key Pin
(56)Friction Gear Retainer
(57)Friction Gear Spring
(58)Friction Gear
(60)Countershaft
(61)Countershaft Center Bearing Bushing
(62)Countershaft Center Bearing
(63)Countershaft Reverse Gear
(64)Countershaft Fifth Gear
(65)Rear Countershaft Bearing
(66)Rear Countershaft Bearing C-Clip
(67)Countershaft Plug
(68)Countershaft Center Bearing
(69)Countershaft Center Bearing Plate
(70)Reverse Idler Gear Thrust Washer
(71)Reverse Idler Gear Needle Bearing
(72)Reverse Idler Gear
(73)Reverse Idler Shaft Bolt
(74)Reverse Idler Shaft