Rear motor seal
Senior User
Joined: Aug 2001
Posts: 407
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From: New England
Rear motor seal
Rear main is not that bad. You have to drop the tranny/transfer case. If you have a manual tranny, take off pressure plate/clutch/flywheel. Seal is a $5 part. Remove the old seal and drive in a new one. Fairly simple fix...but very time consuming. While you are in there, take a close look at the pilot bearing and the slave cylinder/throwout bearing. These are cheap parts that tend to need replacing. If you have an automatic, just remove the tranny/transfer case and the torque convertor/flywheel and replace the seal.
Make sure that you drive the seal in straight, if not is will leak fairly quickly.
Good Luck.
Make sure that you drive the seal in straight, if not is will leak fairly quickly.
Good Luck.
Posting Guru
Joined: Feb 2001
Posts: 1,728
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From: Keweenaw Bay, MI
Rear motor seal
Usually when the oil seals start to leak it is because your main bearings have worn to a point where your crankshaft has dropped down, and when the engine is running it orbits a larger circle than that of your main bearing journal diameter, thereby, wearing the seals. I would highly recommend that you replace your main and connecting rod bearings and oil pump if you are going this far.
Senior User
Joined: Aug 2001
Posts: 407
Likes: 0
From: New England
Rear motor seal
No need to raise the motor once the tranny and things are out of the way it will be right in front of you.
You shouldn't get anything inside the tranny, because you are not opening the tranny, just unbolting it from the block. The torque convertor should come out with the tranny. The rear main seal is on the back of the motor, where the crankshaft comes out between the oil pan and the block. There is no need to mess with motor mounts or the oil pan (unless it is leaking too).
This is best done on a lift. It will be difficult to line up the seal and get it in straight while laying on your back. Even more difficult to get the tranny out while laying on the ground. I guess I should re-phrase it to say, it is simple with a vehicle lift.
You shouldn't get anything inside the tranny, because you are not opening the tranny, just unbolting it from the block. The torque convertor should come out with the tranny. The rear main seal is on the back of the motor, where the crankshaft comes out between the oil pan and the block. There is no need to mess with motor mounts or the oil pan (unless it is leaking too).
This is best done on a lift. It will be difficult to line up the seal and get it in straight while laying on your back. Even more difficult to get the tranny out while laying on the ground. I guess I should re-phrase it to say, it is simple with a vehicle lift.
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