C6 Trans Oil Type

[norcal510]

Hello all,

I plan to service the trans on my 70 Mach 1. Could someone tell me what oil type the C6 or FMX trans uses. I've searched the net but cant seem to find a concrete answer.

Is it type F or dexmerc II?


Thanks all

[Mach 1 Club]

Type F is what it came with and requires. Type FA is acceptable too for trannys requiring F. You may have to look around or have it ordered for you, not all places stock it on the shelves anymore.

Dexron is a more modern fluid. The tranny will slip and not shift right if it's put into a Type F or FA tranny.

I use Valvoline high mileage with stop leak in mine, Seems to work good, stopped every leak I had with the tranny!!

[norcal510]

Great my local parts store has a bunch of Type F on the self.


Thank you very much!

[Mach 1 Club]

No problem don't be a stranger!