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Well I hate to make suggestions , I had a great fluid but the refinery that made it went buns up, it was basically a 10W30 type F.
I have customers that run with success mobil1 ,torco and royal purple and I can honestly say I havent seen much as far as clutch wear decrease but gear wear is slightly better in high hp applications so far.
Others have run type f ,mopar atf4 and numerous dexron oils under several labels.
The only research I have done is to see if the transmission shows an improvement in wear items after a season of racing. The new oils being tried this season are the amsoil and lucas racing fluids. Im hoping I will see a reduction in some of the gear wear in the powerglides without being too slippery and causing clutch problems, but only time will tell.

Take care ,Hutch
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