1994 AUTOMATIC TRANSMISSION SERVICING General Motors Corp. Transmission Removal & Installation
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
Scheme 209
Scheme 209: Removal (3T40 Transaxle)
- Disconnect and shield negative battery cable. Remove air cleaner. Remove bolt securing transaxle throttle valve cable to transaxle. Remove shift cable and bracket from transaxle. Disconnect electrical connectors as necessary.
- Disconnect oil cooler lines from transaxle. Plug ends of lines. Remove all transaxle-to-engine bolts except bolt nearest starter motor (leave this bolt loosely installed). Support engine from top. Raise and support vehicle on hoist. Remove left front wheel. Remove left engine splash shield. Remove pinch bolt from left ball joint. Disconnect ball joint from left control arm. CAUTION: If steering intermediate shaft is not disconnected from steering gear stub shaft as described in next step, these components could be damaged, possibly resulting in loss of steering control.
- Remove pinch bolt securing steering intermediate shaft to steering gear stub shaft. Remove stabilizer bar. Center-punch the 2 spot welds securing left crossmember to rear crossmember. Left crossmember is the 90-degree frame piece that acts as left frame and front crossmember. (Scheme 209) Drill out spot welds using 7/16" drill bit.
- Remove bolt securing left end of steering rack to rear crossmember. Remove 4 bolts securing left crossmember to right frame. Using jackstand, support left crossmember from bottom. Remove 2 bolts securing left crossmember to body.
- Remove 2 nuts securing left transaxle mount to left crossmember. Remove left crossmember and jackstand. Remove starter and torque converter shields. Remove 3 flexplate-to-converter bolts. Remove 2 transaxle extension bolts from engine-to-transaxle bracket.
- Remove rear transaxle mount bracket assembly (it may be necessary to raise transaxle). Using transaxle jack, support transaxle from bottom. Remove 2 braces from right end of transaxle. Remove left drive axle. See «AXLE SHAFTS - FRONT»(/buick/century/v-1982-1996/remont/axle-shafts/#axle-shafts-front) article in DRIVE AXLES.
- Remove remaining transaxle-to-engine bolt near starter. Remove transaxle and right drive axle as an assembly.
Removal (4T60-E Transaxle)
- Disconnect and shield negative battery cable. Remove air cleaner. Disconnect electrical connectors as necessary. Remove shift cable and bracket from transaxle. Disconnect vacuum modulator hose from modulator. Remove 3 upper transaxle-to-engine bolts. CAUTION: If steering intermediate shaft is not disconnected from steering gear stub shaft as described in next step, these components could be damaged, possibly resulting in loss of steering control.
- Remove pinch bolt securing steering intermediate shaft to steering gear stub shaft. Support engine from top. Raise and support vehicle on hoist. Remove front wheels. Remove engine splash shields. Remove pinch bolts from ball joints. Disconnect ball joints from control arms.
- Remove stabilizer bar. Center-punch the 2 spot welds securing left crossmember to rear crossmember. Left crossmember is the 90-degree frame piece that acts as left frame and front crossmember. (Scheme 209) Drill out spot welds using 7/16" drill bit.
- Remove nuts from front and rear transaxle mounts. Remove bolts from power steering cooler line bracket. Remove bolts securing left crossmember to right frame. Using jackstand, support left crossmember from bottom. Loosen 2 right frame mounts and discard bolts.
- Remove 2 left crossmember-to-body bolts. Remove left crossmember. Remove torque converter shields. Remove flexplate-to-converter bolts. Remove drive axles. See «AXLE SHAFTS - FRONT»(/buick/century/v-1982-1996/remont/axle-shafts/#axle-shafts-front) article in DRIVE AXLES.
- Remove transaxle support bracket bolts from transaxle. Disconnect transaxle cooler lines from transaxle. Using transaxle jack, support transaxle from bottom. Remove rear transaxle bolts from engine. Remove remaining transaxle-to-engine bolts. Remove transaxle.
To install, reverse removal procedure. Tighten nuts and bolts to specification. See TORQUE SPECIFICATIONS . Adjust transaxle throttle valve cable and gear shift linkage. See ADJUSTMENTS in appropriate TRANSMISSION SERVICING - A/T article. Adjust front wheel toe-in, if necessary. Fill transaxle to proper fluid level.
| CAUTION | Before installing pinch bolt in hole at steering gear stub shaft, ensure shaft is seated. If shaft is not seated, components may separate, causing loss of steering control. |
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) |
| Flywheel-To-Converter Bolt | 46 (62) |
| Frame Mount Bolt | 40 (54) |
| Intermediate Shaft-To-Steering Gear Shaft Bolt | 40 (54) |
| Shift Control Cable Bracket-To-Transaxle Bolt | 18 (24) |
| Transaxle-To-Engine Bolt | 55 (75) |
| Wheel Lug Nuts | 100 (136) |