Extension housing oil seal (2WD) — replacement
1. Oil leaks frequently occur due to wear of the extension housing oil seal. Replacement of this seal is relatively easy, since it can be performed without removing the transmission from the vehicle.
2. The extension housing oil seal is located at the extreme rear of the transmission, where the driveshaft is attached. If leakage at the seal is suspected, raise the vehicle and support it securely on jack stands. If the seal is leaking, transmission lubricant will be built up on the front of the driveshaft and may be dripping from the rear of the transmission.
3. Remove the driveshaft (see Driveline).
4. Using a seal removal tool or a large screwdriver, carefully pry the oil seal out of the rear of the transmission (see illustration). Do not damage the splines on the transmission output shaft.
5.4 Carefully pry the old seal out of the extension housing — don’t damage the splines on the output shaft
5. Using a seal driver or a very large deep socket as a drift, install the new oil seal (see illustration). Drive it into the bore squarely and make sure it’s completely seated.
5.5 Drive the new seal into place with a seal driver or a large socket and hammer
6. Lubricate the splines of the transmission output shaft and the outside of the driveshaft yoke with lightweight grease, then install the driveshaft (see Driveline). Be careful not to damage the lip of the new seal.