Ryan Thompson

1985 928 32v auto
please see the picture it looks like there's too much spline showing based on a write-up I read on a 93 928 GTS.

Bertrand Daoust

Yes way to much.

Looks like the shaft moved to the back. You'll need to check the back for sure.

The front should look like this.

Ryan Thompson

I should have mentioned I am reinstalling a new/used motor after TBF.

Do I just loosen the rear pinch bolt and move it back?

Any suggestions on how to do this?

I have the plug out of the rear pinch bolt location and have loosened it a little, but may need to do more. Also sprayed pb blast liberally in the tt hole.

Bertrand Daoust

Ok, I see.

You need to move the shaft forward until everything is well aligned.
Make sure the front bolt is lose. Remove the back bolt and aligned everything.

Mark R.

I can tell you exactly what is happening here Ryan.

Your rear clamp bolt is installed in the shaft neck-down area, instead of in the shaft cutout where it belongs.

Edit: Betrand beat me to it...

FredR

Something looks somewhat out of whack there- has the drive shaft been displaced rearwards by any chance?

The rear pinch bolt is not adjustable as the bolt engages a detente in the shaft. Sounds as though you need to inspect the rear bolt and more to the point fit a new one but before that you need to ensure the detente aligns with the bolt hole and that the assembly has not been chewed up as it were.

Mark R.

I encountered the exact same problem. Read this thread:

https://rennlist.com/forums/928-foru...y-looking.html

Bertrand Daoust

Mark, you just used the right words to what I was trying to show with the pic!
Thanks.

I always try to do my best but my lack of English language skills is often a problem for me here...

Mark R.

I'd say you're doing pretty darn well, Bertrand.

Your English is WAY better than my French...

James Bailey

Pretty obvious why the prior engine suffered thrust bearing failure !!!! Clueless " mechanic " .