5L40-E/5L50-E - Automatic Transmission

Case Extension and Gasket Replacement

Removal Procedure




1. Remove the drive flange (2) and seal (3). Refer to Drive Flange and Seal Replacement (Drive Flange and Seal Replacement).
2. Place a suitable jack under the transmission pan in order to support the transmission.
3. Remove the transmission support. Refer to Transmission Support Replacement (Except 5L40 and 6L50) (Transmission Support Replacement (Except 5L40 and 6L50))Transmission Support Replacement (5L40 and 6L50) (Transmission Support Replacement (5L40 and 6L50)).
4. Place a suitable drain pan under the extension housing.




5. Remove the extension housing retaining bolts (1).
6. The output shaft retainer will slide off the output shaft while removing the case extension housing.
7. Remove the extension housing (2) and the seal (4).

Installation Procedure




1. Install the output shaft thrust washer to the inner side of the case extension housing prior to installing of the case extension housing. Align the thrust washer tabs with the locating slots on the case extension housing.





Note: The case extension housing gasket seal is reusable. Replace the gasket ONLY if the sealing surface is damaged.

2. Install the extension housing (2) and the seal (4).

Caution: Refer to Fastener Caution (Fastener Caution).

3. Install the extension housing bolts (1) and tighten to 22 Nm (16 lb ft).
4. Install the transmission support. Refer to Transmission Support Replacement (Except 5L40 and 6L50) (Transmission Support Replacement (Except 5L40 and 6L50))Transmission Support Replacement (5L40 and 6L50) (Transmission Support Replacement (5L40 and 6L50)).
5. Remove the transmission jack.




6. Install the drive flange (2) and seal (3). Refer to Drive Flange and Seal Replacement (Drive Flange and Seal Replacement).