Throwout Bearing Play

[Shizap]

Originally Posted by 1991 Corvette ZR-1

So ZF Doc aka Bill Bourdeau has a service in which you can send him your pressure plate and he can make sure it is correctly set up, so it has proper engagement of the disc and not lop sided. If I remember correctly, he mentioned the parent company that owns Valeo has a monopoly on the style of pressure plate made for pull type clutches for C4 Corvettes and they do not care about tolerances and accuracy. So no matter where you get the pull type pressure plate from, if it is not NOS OEM, it is coming from the same manufacturer slapping them together. So the SPEC plates are very likely the same pig, just wearing lipstick - pretty blue paint.

If I were you, I would take the time, reach out to Bill or strongly consider the push type conversion.

Yes, I?m aware that all the pull type clutches now made for C4s are made from the same parent company. Unfortunately, it is near impossible to find a NOS Valeo plate. Did you end up sending your pressure plate off to ZF doc for this service?

[1991 Corvette ZR-1]

Originally Posted by Shizap

Yes, I?m aware that all the pull type clutches now made for C4s are made from the same parent company. Unfortunately, it is near impossible to find a NOS Valeo plate. Did you end up sending your pressure plate off to ZF doc for this service?

I did not. I actually found out about if from him the night I was installing the assembly into the car. Impatience and rolling of the dice and all that. Also, I had just received the flywheel and plate back from a balance job done by Marc. I did not want to risk compromising the balance job if Bill had to level any of the pressure plate feet. Thankfully, all has been quiet and well with smooth engagement.

If you are willing to wait a week or so, give him a call. If it were me, I would. Dropping the trans is no fun, even during the winter months.