05-23-2019, 03:02 AM
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#3
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Senior Member
Join Date: Jul 2012
Location: Australia/USA/EU/Soviet Russia
Posts: 1,105
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Re: Yellow metals in Ford A transmission
Quote:
Originally Posted by Forddan
Hi
I have a Tudor from January 1929.
Does this car have yellow metals in the transmission ?
In another thread of mine about STP it was mentioned that I have to be careful because it contains zinc anti wear ZDDP. And that supplement will affect yellow metals.
Can someone confirm me if I have to be worried if I mix 50/50 STP with 600w oil with respect to those metals. Unless my car do not have them and then there is nothing to be worried of.
Thanks
Daniel
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Why are you complicating a simple situation? If you believe the 600w is too thin then buy a proper thicker oil; forget STP since it worries you. Buy Penrite Transoil 250 which is yellow metal friendly (GL-1) and use it straight or mix with 600W. A one liter bottle costs $16 at Restoration Supply Company.
https://www.restorationstuff.com/
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