Re: Twin Ultramatic Problem

Posted by Tim Cole On 2012/9/8 16:46:33

This note is for Ross:

I did a little research. Type A (the original trans oil) is essentially AW32/46 hydraulic dyed red. Type F is a little heavier on average.

If the problem with these old transmissions is worn parts (especially gear to body and gear to cover clearances) then why not try mixing Dexron (AW32 plus modifiers) with AW68 hydraulic to increase line pressures?

The specs for these transmission oils are all over the map and I suspect things like Lucas are just heavy hydraulic oils that increase line pressure.