Cast iron PG ATF

[Michael L.]

What transmission fluids are best to run in a cast iron Powerglide? Mine is a '55 model.

[Roy B.]

Re: Cast iron PG ATF

Any thing today is OK

[Joel A.]

Re: Cast iron PG ATF

Dextron would be best, but, as Roy said, anything would work. The older style Ford type "F" fluid will make it shift a bit firmer, but that's not really a good thing on an older ci/pg. I'd stick with the Dextron III.

[Frank C.]

Re: Cast iron PG ATF

IIRC...many many smelt seasons ago, I was told never to use F**d type "F" in GM tranny because it contained graphite