Jim_H

Getting ready to put clutch pack in this morning and noticed 2
things.

1. My new throw out bearing has a split type plastic race
that rides on the guide tube and I am afraid to force the tube in.
The race is a bit smaller than the tube but being split like it is
maybe I am supposed to spread it?

2. !*&*@$#$#! There is a bit of a groove on the outside of the guide
tube on 1 side. Probably from miss alignment becaude the arm didn't
have a bushing. Anyway I am wondering if I should use it. The worn
circumference is 1.328" and the unworn 1.33" I know this doesn't
sound like a lot but I could feel a ridge and see the wear mark
once I cleaned it so I thought I would ask the pro's.

Wild Bill

Jim, You need the new style guide tube designed to work with the new TO bearing. Different o.d. and different finish... Should glide smoothly into TO bearing plastic split bushing designed for use without lubrication.

I ran into the same problem... Although you can still buy the old style parts, you have to have all the new style to insure compatability. After similar confusion and mis-matched components, I ended up having to get a new release arm and guide tube to make things work right.

Jim_H

I have a 91. It already has the large ball stud but the TO bearing might need a different sleeve?? I thought this was all changed before 91. This sucks.

9x8

Okay, sorry for resurrecting this, but I ran into the same problem with my '90 GT.
I got the "newer type" release bearing with plastic inner race. (Other than that bearings look identical).
Obviously, my old guide tube won't fit into it.
I'm really NOT willing to wait another month for "proper" guide tube, so:

long story short - is there absolutely no way of using this with my guide tube? Should I just reassemble everything with my old release bearing and live with that rattle?

Lizard928

On this issue if you get the new bearing then you MUST use the new GTS guide tube AND release arm!

Alternatively you can buy the new bearing and remove the circlip which holds the bearing to the housing. Then seperate the bearing from the housing and repeat this process with the old. You can then put the new bearing on the old housing and reuse the old clutch arm and guide tube.

9x8

Thanks for the advice.

It seems like my car has been "serviced" earlier by someone who has absolutely no clue about 928s. It had later (GTS style) T/O bearing - but with plastic inside parts taken out - sliding over what seems to be early guide tube. That's why I mentioned earlier that both new and old bearings look identical - they apparently are. Clutch fork seems to be of newer type as well.

So, basicly, since I had everything but the guide tube of newer design - and assumed that since everything worked this way, I did the same thing previous "servicemen" did (yea, I know, I know): I took out those plastic pieces from TO bearing, fit the bearing over the guide tube and put everything back together.

Now, some time for explaining why I went in there in the first place: the main reason for a clutch job was this very very annoying sqeaking sound that came from the clutch, depended on engine revs and went away as soon as clutch was being pressed. The VERY likely main suspect was T/O bearing.

Well, you guessed it - after I put everything back together, the squeaking was there again!
Took me some time to figure out that the problem most likely comes from the guide tube - since T/O bearing will freely spin on it - instead of bearing working itself. So, apparently now I need a guide tube of newer design to fix this. Gladly I didn't throw out those plastic TO bearing inserts either.

Quick summary:
If you want to replace clutch components with those of newer design, replace everything!

Edit:
BTW, is it possible to replace guide tube without taking out clutch pack?

Lizard928

no you must remove the clutch to get the guide tube out.

9x8

Well, this sucks.