Rear main seal

[kazzx]

I am about to attempt to change my rear main seal. Has anyone done this that can offer any advice ? I have an 87 with the 4.0

[Xacto]

A few older posts regarding the rear main that might be helpful:

 

http://www.comancheclub.com/forums/viewtopic.php?t=2346

 

http://www.comancheclub.com/forums/viewtopic.php?t=397

[kazzx]

Good information there. I guess the search button works!

[jeepthing07]

I did it on a friends 258 the manual said to loosen all the main caps and re-torque them. He hasent had a problem yet with it. We used the double lip seal.

[Duner]

My Dad and I recently did this one. First do you have an automatic or manual? We were not able to get the crank to drop due to the pilot bushing still engaged to the trans mainshaft, ended up having to seperate the trans from the engine about an inch after that no problem. If you have an auto you may be able to unbolt the converter and pry the converter back enough to let the flywheel drop with the crank.

Also took the opportunity to replace the timing chain, oil pump seemed like a good preventitive maintenance opportunity if your budget allows.

[jeepthing07]

My Dad and I recently did this one. First do you have an automatic or manual? We were not able to get the crank to drop due to the pilot bushing still engaged to the trans mainshaft, ended up having to seperate the trans from the engine about an inch after that no problem. If you have an auto you may be able to unbolt the converter and pry the converter back enough to let the flywheel drop with the crank.

Also took the opportunity to replace the timing chain, oil pump seemed like a good preventitive maintenance opportunity if your budget allows.

 

You don't need to touch the transmission or remove the crank to change the rear main on a 4.0.