Presence of Extension Housing Bushing in 4 Cyl.?

Hey all,

Can any of you verify the existence of an extension housing bushing at the slip yoke of the driveshaft of the 2nd gen. 4 cyl.?

I have a recurring leak from my extension housing and have had the seal replaced twice. The ship doing the replacements can't get it fixed and is suggesting I take it to the dealership.
I asked if they had checked the extension housing bushing for wear, if the slip yoke was in good condition, and if their was play in the U joints. They swore up and down the WAS no extension housing bushing. They didn't really answer the other questions... but that's neither here nor there.

I'm going to head in to the dealership sometime soon, but I want to at least have an idea of what the issue could be. Can anyone give me a bit more to go on here?