Extension Housing: Service and Repair
Extension Housing GasketRemoval
NOTE: The 4x2 application is shown, the 4x4 application is similar
All vehicles
1. Place the transmission range selector lever in the NEUTRAL position.
2. Raise the vehicle on a hoist.
4x4 vehicles
3. Remove the transfer case.
4x2 vehicles
4. Remove the driveshaft.
5. Remove the transmission insulator to crossmember support nuts.
6. Install a suitable high-lift transmission jack.
7. CAUTION: Be sure not to raise the back of the transmission too high, if it makes contact with the underbody damage to the TSS and OSS sensors will occur.
Remove the rear transmission mount.
1 Raise the transmission up off the rear crossmember support.
2 Remove the bolts.
3 Remove the rear transmission mount.
8. Remove the bolts and the transmission extension housing.
9. Remove and discard the extension housing gasket.
Installation
All vehicles
1. NOTE: The extension must have a shoulder or a boss cast in it to hold the orifice lube plug in the back of the case. If the wrong extension housing is used, the plug may become loose and/or fallout and cause transmission damage.
NOTE: Lightly lubricate the gasket with petroleum jelly to hold it in place during assembly.
Install the new extension housing gasket.
1 Verify that the extension has a shoulder cast in it.
2 Install the new extension housing gasket.
2. Install the extension housing bolts.
3. CAUTION: Be sure not to raise the back of the transmission too high, if it makes contact with the underbody, damage to the TSS and OSS sensors will occur.
Install the rear transmission mount.
1 Raise the transmission up.
2 Install the rear transmission mount.
3 Install the bolts.
4. Lower the transmission on to the rear crossmember support.
5. Install the transmission insulator and nuts.
6. Remove the high-lift transmission jack.
4X2 vehicles
7. Install the driveshaft.
4X4 vehicles
8. Install the transfer case.
All vehicles
9. Lower the vehicle.
10. Check fluid level, fill with clean automatic transmission fluid.
11. Check for correct operation.