GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Lucerne 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Component Location
Figure 1:

Transaxle Major Components
Object Number: 13235 Size: LF
(1)Torque Converter Assembly
(2)Manual Shaft
(3)2nd Clutch
(4)Reverse Clutch
(5)3rd Clutch
(6)Forward Clutch
(7)Coast Clutch
(8)Low Roller Clutch Assembly
(9)Output Speed Sensor Assembly
(10)Differential Assembly
(11)Output Shaft (Differential Side Gear)
(12)Final Drive Assembly
(13)Lube Fitting
(14)Forward Sprag Clutch Assembly
(15)Low/Reverse Servo Assembly
(16)Input Planetary Gear Set
(17)Reaction Planetary Gear Set
(18)Reverse Accumulator
(19)Forward Accumulator
(20)1-2 Accumulator
(21)4th Servo
(22)3-4 Accumulator
(23)2nd Sprag Clutch Assembly
(24)Drive Link Assembly
(25)Output Shaft
(26)Driven Sprocket
(27)Input Speed Sensor Assembly
(28)Upper Control Valve Body Assembly
(29)Secondary Pump Assembly
(30)Primary Pump Assembly
(31)Scavenge Pump Assembly
(32)Drive Sprocket
Figure 2:

Bushings, Bearings and Washers
Object Number: 15580 Size: LF
(102)Final Drive Sun Gear/Final Drive Carrier Thrust Bearing
(111)Right Differential Thrust Washer
(117)Left Differential Thrust Washer
(124)Case Extension Bushing
(132)Thrust Bearing Assembly
(132)Thrust Bearing Assembly
(132)Thrust Bearing Assembly
(133)Differential Carrier/Case Extension Selective Thrust Washer
(208)Oil Pump Driven Shaft Thrust Washer
(401)Converter Hub Bushing
(402)Front Stator Shaft Bushing
(408)Ball Bearing (2)
(417)Thrust Bearing
(419)Oil Transfer Sleeve
(436)Support/Reverse Clutch Thrust Washer
(440)Thrust Bearing
(502)Small Bushing
(503)Large Bushing
(520)2nd Clutch Outer Race Washer
(521)Thrust Bearing
(522)Driven Sprocket Support Selective Thrust Washer
(602)Input Shaft Bushing
(603)Input Shaft/Oil Transfer Sleeve
(615)Input Shaft/3rd Hub Thrust Washer
(618)Hub Bushing
(619)Thrust Bearing Assembly
(622)Reaction Sun Gear Bushing
(710)Thrust Bearing Assembly
(713)Flange to Outer Race Thrust Washer
(718)Flange/Forward Clutch Housing Thrust Bearing
(720)Race/Coast Clutch Hub Thrust Washer
(723)Input Flange Bushing
(803)Small Housing Bushing
(804)Large Housing Bushing
(824)Oil Transfer Sleeve
(825)Left Support/Sun Shaft Bushing
(826)Right Support/Sun Shaft Bushing
(832)Forward Clutch Support/Park Gear Thrust Bearing
Figure 3:

Seals
Object Number: 614318 Size: LF
(4)Connector, O-Ring Cooler (Return)
(30)Gasket, Side Cover to Case Cover
(34)Seal, Case Cover to Drive Sprocket
(35)Seal, Case Cover to Turbine Shaft
(37)Seal, Axle Case Cover
(122)Seal, Final Drive Sun Gear
(125)Seal, Axle to Case Extension
(126)Seal, Case Extension to Case
(130)Sensor, Speed Output Assembly
(209)Seal, Filter
(346)Seal, 2-3 Accumulator Piston
(403)Seal, Converter Hub Assembly
(409)Ring, Drive Sprocket Oil Seal
(412)Seal, O-Ring
(423)Ring, 4 Lobe Seal (2)
(430)Piston Assembly, 2nd Clutch
(506)Seal (Inner)
(507)Seal (Outer)
(525)Seal, Servo Cover
(532)Seal, 4th Servo Piston
(606)Piston Assembly, 3rd Clutch
(614)Ring, Oil Seal (2)
(808)Forward Clutch Piston Seal (Inner)
(809)Forward Clutch Piston Seal (Outer)
(810)Piston Assembly, Coast Clutch
(828)Seal, Cooler Return
(829)Ring, Oil Seal (Support/Housing) (3)
(929)Seal, Low/Reverse Servo (Small)
(930)Seal, Low/Reverse Servo (Large)
(947)Seal, Reverse Accumulator
(961)Seal, Forward Accumulator
(969)Seal, 1-2 Accumulator
(976)Seal, 3-4 Accumulator