I had several things I wanted to do that required the transfer case skid to be removed. I thought I would do all of them at the same time.
1. Clean up rust on frame where skid touches.
2. Fix leak coming from where the tranny and tcase attach.
While I was at it, why not do a tummy tuck?
3. Tummy tuck and engine skid.
4. Replace tcase shifter linkage.
I broke all these up into different threads. If you're interested you can search for them by their titles.
1. POR-15 Rust Repair on Frame Report
2. Transmission and Transfercase Seal Replacement Report
3. UCF Tummy Tuck and Engine Skid Report
4. Novak Transfer Case Shifter Linkage Report
I have a 2001 Wrangler Sport I6, 3 speed auto and NP231 tcase. It has 77,000 miles.
I am not an expert. I followed instructions, factory service manual and forum postings.
Below is my leak. See arrow. Over a couple weeks it would accumulate on the skid plate enough to start dripping on the driveway.
It's hard to tell if the tranny or tcase is leaking since they use the same fluid. I guess I'll replace both seals!
Finding the right part numbers for the seals wasn't as straight forward as expected.
I started with the Jeep parts catalog for my model. Advance Auto Parts and others have no idea what to do with these part numbers. Apparently, cross referencing or even offering a suggestion where to go is out of their grasp. I'm sure the dealership does, since it's their part numbers, but there's many reasons why I don't want to use them.
- 4167 929 - Transfer case input gear seal
- 4269 956 - Transmission adapter seal
I then stumbled across this web site: Timken Online Parts Catalog
It will cross reference the Mopar part numbers to Timken/National part numbers. Sweet!
- 4167 929 becomes 3173 - Transfer case input gear seal
- 4269 956 becomes 710058 - Transmission adapter seal
Just in case I needed a speedi-sleeve (repair sleeve) I picked up a couple. The tcase input shaft rides on both the tranny and tcase seals. Because of this, the same sleeve is used. Again, I choose National.
Advance Auto Parts sells National. This is the brand I wanted to go with. They seem to have a good reputation. Others are probably fine, but I would hate to replace a faulty new seal. I ended up buying a couple of each. I'll return what I don't use. In the below pic you will notice there is an additional seal 710928. It doesn't belong. I got it out of confusion after visiting Rockauto.com.
Let's get this out of the way. If you look at below picture you will see there is an adapter that connects the tranny and tcase. There is a gasket between the tranny and adapter, but not the adapter and tcase. So don't worry about it.
#7 is the transmission adapter.
#8 is the adapter seal.
#14 is the transmission case gasket.
These are the specialized tools I used:
- Seal puller. If you've seen one you've seen them all?
- PVC pipe for seal driver
- Harbor Freight transmission jack (#39178 ) $79.99
If you have some help you don't need the tranny jack. I do not. My friends could care less about working on a car. It was very useful.
See the "POR-15 Rust Repair on Frame Report" thread.