Transmission System Description and Operation. Chevrolet Export Chevy P42 Commercial Chassis 2000

For 1990-2009 cars

Figure 1:

#### Transmission Case and Gear Sets

(1) | Countershaft Rear Bearing
(2) | Thrust Washer Pin
(3) | Transmission Countershaft
(4) | Countershaft Front Bearing
(5) | Reverse Idler Gear Shaft
(6) | Reverse Idler Gear Washer
(7) | Reverse Idler Gear Bearing
(8) | Reverse Idler Gear
(9) | Reverse Idler Gear Washer
(10) | Input Shaft Bearing Retainer Bolt
(11) | Input Shaft Retainer
(12) | Input Shaft Seal
(13) | Input Shaft Bearing Cup
(14) | Countershaft Bearing Cap
(15) | Countershaft Front Bearing Cup
(16) | PTO Cover Bolt
(17) | PTO Cover
(18) | Chip Magnet
(19) | Transmission Case
(20) | Countershaft Rear Bearing Cup
(21) | Countershaft Bearing Shim
(22) | Countershaft Thrust Washer
(23) | Countershaft Rear Bearing Retainer
(24) | Countershaft Rear Bearing Retainer Bolt
(25) | Overdrive Gear Bearing
(26) | Countershaft Overdrive Gear
(27) | Synchronizer Strut
(28) | Synchronizer Spring
(29) | Overdrive Synchronizer Sleeve
(30) | Overdrive Gear Blocking Ring
(31) | Overdrive Clutch Gear
(32) | Overdrive Synchronizer Retaining Ring
(33) | Overdrive Shift Fork
(34) | Shift Fork Lock Pin
(35) | Overdrive/Reverse Shift Shaft
(36) | Mainshaft Bearing Retainer Bolt
(37) | Mainshaft Bearing Retainer
(38) | Mainshaft Bearing Shim
(39) | Mainshaft Rear Bearing Cup

Figure 2:

#### Main Drive Gear and Mainshaft Gear Sets

(1) | Vehicle Speed Sensor Reluctor Wheel
(2) | Mainshaft Overdrive Gear
(3) | Mainshaft Rear Bearing
(4) | Reverse Gear Thrust Washer
(5) | Reverse Gear
(6) | Reverse Gear Synchronizer Insert
(7) | Synchronizer Spring
(8) | Reverse Gear Synchronizer Ring
(9) | Reverse Shift Detent Spring Sleeve
(10) | Reverse Gear Bearing
(11) | Reverse Gear Spacer
(12) | Reverse Gear Retaining Ring
(13) | 1st/Reverse Gear Clutch Hub
(14) | 1st Gear Bearing
(15) | 1st Speed Gear
(16) | Mainshaft
(17) | Thrust Washer Retaining Pin
(18) | 1st Gear Outer Synchronizer Ring
(19) | Middle Synchronizer Ring
(19) | Middle Synchronizer Ring
(20) | Inner Blocker Synchronizer Ring
(20) | Inner Blocker Synchronizer Ring
(21) | Retainer Ring
(21) | Retainer Ring
(21) | Retainer Ring
(22) | 1st/2nd Gear Synchronizer Spring
(23) | Synchronizer Spring
(24) | 1st/2nd Gear Synchronizer Insert
(25) | 1st/2nd Gear Synchronizer Hub
(26) | 1st/2nd Synchronizer Sleeve
(27) | 2nd Gear Outer Synchronizer Ring
(28) | 2nd Speed Gear
(29) | 2nd Speed Gear Bearing
(30) | 3rd Gear Thrust Washer
(31) | 3rd Gear Retaining Ring
(32) | Mainshaft Gear Bearing Spacer
(33) | Mainshaft 3rd Speed Gear
(34) | 3rd Speed Gear Bearing
(35) | 3rd Gear Blocking Ring
(36) | 3rd/4th Gear Synchronizer Hub
(37) | 3rd/4th Gear Synchronizer Spring
(38) | 3rd/4th Gear Synchronizer Insert
(39) | 3rd/4th Gear Synchronizer Sleeve
(40) | 3rd Gear Blocking Ring
(41) | Drive Gear Clutch Gear
(42) | Drive Gear Bearing
(43) | Main Drive Gear Bearing
(44) | Main Drive Gear
(45) | Input Shaft Bearing Cone

Figure 3:

#### Shift Cover

(1) | Cup Interlock Expansion Plug
(2) | Cover To Case Bolt
(3) | Cover Pin
(4) | Shift Lever Cover
(5) | Vent Pipe
(6) | Shift Fork Interlock Pin
(6) | Shift Fork Interlock Pin
(6) | Shift Fork Interlock Pin
(7) | 3rd and 4th Shift Fork
(8) | Shift Fork Pad
(9) | 1st and 2nd Shift Shaft
(10) | Shift Interlock Plunger
(11) | Shift Rod Interlock Pin
(12) | 3rd and 4th Shift Shaft
(13) | 1st and 2nd Shift Fork
(14) | 1st and 2nd Shift Lug
(15) | 3rd and 4th Shift Lug
(16) | Reverse and Overdrive Fork
(17) | Overdrive Lug
(18) | Overdrive and Reverse Shift Shaft
(19) | Shift Fork and Bar Poppet Plunger
(20) | Shift Rod Poppet Ball Spring
(21) | Shift Bar Housing Expansion Plug
(22) | Backup Lamp Switch
(23) | Backup Lamp Switch Gasket

Figure 4:

#### Transmission Extension

(1) | Mainshaft Nut
(2) | Mainshaft Nut Washer
(3) | Transmission Extension
(4) | Transmission Bolt
(5) | Transmission Case Lock Pin
(6) | Vehicle Speed Sensor
(7) | Transmission Case Lock Pin
(8) | Transmission Bolt
(9) | Transmission Extension
(10) | Rear Output Shaft Rear Bearing
(11) | Mainshaft Rear Bearing Retainer Ring
(12) | Mainshaft Seal
(13) | Propeller Shaft Yoke
(14) | Rubber Washer
(15) | Mainshaft Nut Washer
(16) | Mainshaft Nut
(17) | Speed Sensor Bolt
(18) | Speed Sensor
(19) | Transmission Case Lock Pin
(20) | Transmission Bolt
(21) | Transmission Extension
(22) | Speedometer Drive Spacer
(23) | Rear Output Shaft Rear Bearing
(24) | Mainshaft Rear Bearing Retainer Ring
(25) | Mainshaft Seal