Originally Posted by doclouie
Dealer did the change out under warranty and they said it was almost a grand because it was a one piece seal and they needed to pull the tranny.
If your '91 XJ had a 4.0L engine, it did not have a one piece seal. If it did have a one piece seal, it did not have a 4.0L engine. There are no other possibilities.
Here is the Fel-Pro parts listing for a '91 XJ. Take a look and see how many one piece rear main seals you see for the 4.0L engine.
Federal-Mogul Resource Center - Vehicle Look-up
If you insist on subscribing to the theory that "The dealer said it, so it has to be true," have at it. Dealers love folks like you. It just proves my point that dealers hoodwink those who don't know any better.
Just recently, I repaired a Ford steering column with a $12 part. Dealer swore to the owner that the part was NLA and the entire steering column had to be replaced, for $950. And they charged him $80 to tell him that lie. That's what dealers do.
And, the ironic things was, that dealer's very own parts department had the $12 part in stock. And the parts man knew what I was talking about before I even finished with the part number. "We sell those all the time," he said.