Wrong clutch bearing?
Thread Starter
Instructor
Joined: Feb 2009
Posts: 191
Likes: 0
From: Woodstock IL
Wrong clutch bearing?
I switched my 93 from a black tag to a brand new blue tag. And I did not realize that I needed to use a different clutch bearing. I was wondering if this is going to be a problem or not? So far I have driven the car with no real issues.
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
If it fits...it won't do anything wrong....You'll know the first time you start the motor and try to put it in gear if the TO Bearing is not going to work.
Then of it is not attached to the fork properly it could fall off and that is a real fun one.
Then of it is not attached to the fork properly it could fall off and that is a real fun one.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
The black tag ID is larger, and I can not see how the bearing will spin concentric if the TOB is offset when the clutch engages.
It may be ok for a while, but be prepared to replace it.
the TOB for black tag 89-93 is 3.175 ID and the blue tage 94-96 TOB is 3.110 ID
http://forums.corvetteforum.com/c4-t...-tag-zf-2.html
http://forums.corvetteforum.com/c4-t...-question.html
It may be ok for a while, but be prepared to replace it.
the TOB for black tag 89-93 is 3.175 ID and the blue tage 94-96 TOB is 3.110 ID
http://forums.corvetteforum.com/c4-t...-tag-zf-2.html
http://forums.corvetteforum.com/c4-t...-question.html
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
When the TOB is not engaged it will be resting on the top side of the Input Sleeve because the fork is loose,
then when the clutch is engaged the TOB will be off center and sniping eccentric, it cant be good.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 191
Likes: 0
From: Woodstock IL
Well you guys appear to be 100% correct. I just spoke with the ZFDOC and he said I have the incorrect throwout bearing. So I guess I will take out the transmission again and do it correctly this time.
One last question though. Do I need to replace just the bearing or the entire throwout bearing assembly?
One last question though. Do I need to replace just the bearing or the entire throwout bearing assembly?
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Well you guys appear to be 100% correct. I just spoke with the ZFDOC and he said I have the incorrect throwout bearing. So I guess I will take out the transmission again and do it correctly this time.
One last question though. Do I need to replace just the bearing or the entire throwout bearing assembly?
One last question though. Do I need to replace just the bearing or the entire throwout bearing assembly?
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Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Would you keep it?
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 195
From: folsom california
they're pricey all right....getting one for my 96....same tob you'll need with your blue tag...cheapest I found was Ecklers , GM bearing, GM# 10222087, Eckler's item # 50583, $89.99.
I presume you did not change out your original TOB, I realize that finances don't allow doing everything at once but as a general rule, given the amount of labor involved in pulling (any) transmission, replacement of the throw out bearing at the same time is good insurance...throw out bearings don't last forever.
I presume you did not change out your original TOB, I realize that finances don't allow doing everything at once but as a general rule, given the amount of labor involved in pulling (any) transmission, replacement of the throw out bearing at the same time is good insurance...throw out bearings don't last forever.
Racer
Joined: Apr 2005
Posts: 408
Likes: 0
And since when does 0.065" (which gives you 0.033 of extra clearance) equal to 1/2 of 3.175"? With the rotational mass spinning that shaft at 6,000rpm on occasion, I'd wager that shaft wiggles more than the 0.033"
If you had forced the shaft through the bearing that was too small, then you would probably notice a problem, ie, situation reversed. I can see a problem there.
Thread Starter
Instructor
Joined: Feb 2009
Posts: 191
Likes: 0
From: Woodstock IL
The thing that agrivates me the most is what I put into this thing. I bought a brand new blue tag for 1,100$ delivered. And I bought a new clutch kit for 325$ delivered. And yes the clutch kit came with a new throwout bearing. However it was for a black tag. So far I have about 1425$ invested in doing this project. What that doesn't include is number of hours spent trying to line up this transmission with a basic floor jack. While the car is suspended in the air with K-mart jack stands.
And to think that I have to do this all over again for a piece of crap TOB? Well guess what?
I JUST ORDERED ANOTHER TOB! This time the correct one. There goes another 89.99$
I should have bought a Harley!
And to think that I have to do this all over again for a piece of crap TOB? Well guess what?
I JUST ORDERED ANOTHER TOB! This time the correct one. There goes another 89.99$
I should have bought a Harley!
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 195
From: folsom california
I feel your pain; I haven't even pulled my trans yet and I'm about $1,000 for flywheel, pressure plate , disc, clutch pilot bearing and throwout bearing...all from reputable dealers (no flea bay); got the wrong pilot bearing....the old (as in antique) style solid bushing instead of the factory roller style...so called experts who couldn't take the time to do the research insisted it was the right one; got the new throw out bearing with one of the ears that hold the retaining clip broken off and laying in the box....unbelievable. 
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
[QUOTE=lt4red;1573763785]
And since when does 0.065" (which gives you 0.033 of extra clearance) equal to 1/2 of 3.175"? With the rotational mass spinning that shaft at 6,000rpm on occasion, I'd wager that shaft wiggles more than the 0.033"
1/2 right all wrong is a shop saying
TIR on the input shaft should not exceed .003" according to Bill Bordeau at ZF Doc.. more than that and the input shaft is bent and or the pilot bearing is substantially worn
And since when does 0.065" (which gives you 0.033 of extra clearance) equal to 1/2 of 3.175"? With the rotational mass spinning that shaft at 6,000rpm on occasion, I'd wager that shaft wiggles more than the 0.033"
1/2 right all wrong is a shop saying
TIR on the input shaft should not exceed .003" according to Bill Bordeau at ZF Doc.. more than that and the input shaft is bent and or the pilot bearing is substantially worn