Q: How to Replace a oil Seal?A: To replace the rear differential pinion seal, raise the vehicle and support it on jack stands. Put the transaxle in Neutral, and the parking brake off. Measure the pinion flange's turning torque and note it. Remove the retaining nut and pinion flange, using a puller if needed. Detach the worn seal, and install a new one. Tighten the pinion flange nut to minimum torque, checking the turning torque against the noted figure. Reinstall the driveshaft and lower the vehicle.