Engine/Transmission (1994 - 1998) What do I need to do to replace the rear main seal?

[JBlackwell]

Well, I have been redoing this poor poor truck I bought out in the woods and once bone stock. I just got done pulling the trans. for fully splined mainshaft, new syncro kit, new bearings and such and also upgrade to a SB 13 Con FE and it looks like the rear main has been leaking pretty good.



So do I need to pull the flywheel housing that bolts to the back of the block??? Everything is pulled already: transmission and bellhousing, clutch, & flywheel.



I appreciate anyones help,

JD

 

[SRadke]

Just drill a small hole in the metal part of the seal and start a screw in it. Grab the screw with vise grips and pull it out. No need to remove that big aluminum piece. The new seal (from Cummins anyway) will come with a plastic deal to start the seal and a steel ring to tap it in with that insure the proper depth. It's really easy.



-Scott

 

[Vaughn MacKenzie]

SRadke, JD is talking about the rear main seal, not the front seal. I don't think it's quite that simple. . . but I'm afraid I don't know the R&R instructions to do it correctly. Some engines you have to loosen some of the main bearing bolts so the crank can drop a bit so you can push out the old seal and push in the new one (2-piece seal). If there is no flange on the end of the crankshaft where the flywheel bolts then it's probably a single piece seal.



Vaughn

 

[SRadke]

Actually Vaughn, it is taht easy. I've done about 5 rears and two fronts and all of the rears were easier than the fronts. Both of them fought me for some reason.



-Scott



PS, thanks for the tip on the Por-20. Watch the hiller B2 threads and you'll see some pics of my beautiful new setup by early next week .

 

[JBlackwell]

I appreciate the help guys, that should get me going again.



JD