85 cj7 4.2l getting replaced with 79 cj7 4.2l, issues...

[Hawaii Girl]

Aloha, maybe someone can help, got 85 cj7 4.2l 5 speed jeep, replacing motor with a 79 cj7 4.2l, has centerfold clutch, guys having major issues trying get motor n tranie to merge, dropping tranie now...why they not merging?

 

[808CJ7]

Check the pilot shaft bushing if it's the correct size and if the splines for the clutch disc match up. Aloha

 

[LGR]

When I did the NV3550 conversion on my 4.2L it took us a day of trying to mate the two. Such a pain, we got it, just took lots of tries and wrench throwing.

 

[flatie46]

Sometimes when you put the pilot bushing in you can close the hole up a bit on the outside edge. It's made of a soft metal and it doesn't take much. May want to check it with the alingnment tool. If it is you can take the burr off with a little sandpaper. Like mentioned above it could have the wrong one in it, I know there's a difference in the size of a 3 and 4 speed pilot bushing from experiance.