For 1990-2009 cars

1. Install the NEW 5 transmission case fluid passage seals (86, 87).
2. Coat the NEW 5 transmission case cover fluid seal rings (21) with ATF and install them to the transmission case cover (19).
3. Place the forward clutch housing thrust bearing assembly (585) with grease on the transmission case cover (19).
4. Remove any packing material on the contacting surfaces of the transmission case cover (19) and transmission case assembly and wipe off oil on the contacting surfaces.

Important: Be careful that there is no oil on the contacting surfaces of the case cover and transmission case assembly.

5. Apply a 3 mm (1/8 in) bead of sealant GM P/N 89020326 (Canadian P/N 89021188) to the case cover as shown.
6. Install the transmission case cover (19).

Notice: Refer to Fastener Notice in the Preface section.

7. Install the 10 transmission case cover bolts (20).

Tighten
Tighten bolts to 25 N·m (18 lb ft).