[DeTomaso] ZF shifting problem

[John Donahue]

Would a clutch disc be that sensitive to operating temperature?

> On Sep 12, 2022, at 3:21 PM, Asa Jay Laughton via DeTomaso <detomaso at server.detomasolist.com> wrote:
> 
> Hi All,
> I just had a call with Mark Mead in Spokane.  Mark has a 1974 Pantera.  He had restoration done somewhere else and now has a problem with the ZF.
> 
> ZF was rebuilt by RBT.  I don’t think the problem is the ZF.  It’s either the gear lube or the clutch.
> 
> Symptoms:
> Cold drive all good, shifting fine.
> After warm up, it will no longer come out of gear like the clutch is not disengaging.
> 
> The place that put the ZF in, used Valvoline synthetic 75-90 gear lube. That’s all he knows.  New master and slave, but not sure about clutch disc or pressure plate.
> 
> I am out of town heading to SSCC with Mad Dog.  I will be troubleshooting Mark’s car when I get back from  all my trips at the end of September.
> 
> In the meantime, I am looking for opinions about the Valvoline synthetic 75-90.  Mark has talked to Drew Backlund, -THE- Pantera guy in Spokane from the 70’s and 80’s.  Drew hasn’t worked on Pantera’s in about 30 years but he has Mark convinced that Redline 75-90 is the -only- gear lube that will actually work.
> 
>  I know it’s one of the best but I need a new refresher on the topic of lubes. Would using the Valvoline cause this issue?  I’m thinking it might be an incorrect clutch disc, not so much the fluid but I won’t know more until late this month when I can touch the car.
> 
> What do we think?
> Thank you,
> Asa  Jay
> 
> Sent via radio waves
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