904 fluid question.

[Fishy]

In the '67 Fish, 69 isn't sure what fluid he put in. there's ATF+3 and Type F. It's actin low and we're not sure what to put in it and he says one is better to mix with the other than vise-versa? :huh: Any suggestions? It only really has very minor issues when gettin on it coming out of a turn, so it's not too bad....yet.

 

[thrashingcows]

Why not drain it...new filter...then fill with your choice?

 

[Fishy]

That's what I thought but if I remember correctly, the last time him and I talked about it he rejected that idea for some reason. :huh:

 

[71ChargerRT]

Type F is thinner if I remember correctly, and I'm pretty sure I was told it the cheap replacement for the B&M "Trick Shift"

 

[69.5CUDA]

see thats kinda what i remember too is type F being the firmer shifting better stuff to use? and that 1 can be mixxed into the other but not recomended to mix the other way around...and i "thought" f int atf was ok but atf into f was bad?

which fluid will net the harder shifts?...maybe its time to just crack it open

 

[71ChargerRT]

If you google Type F in a Mopar or Chevy a lot of links like this come up

http://www.stevesnovasite.com/forums/archive/index.php/t-110263.html

It seems to be the cheap alternative to the B&M fluid. Type F is rougher, I guess, while the ATFIII, +4 is slipperier(?)

 

[Dr.Jass]

Pure Type F is the only way to go. B&M Trick Shift is Type F, with some supposed enhancements.

I would drain the trans and converter, and put in straight Type F. It's been a Torqueflite "speed secret" for over 40 years, and the trans will actually last longer as well as perform better.

 

[69.5CUDA]

belive it or not doc this is still the original trans with a backyard shift kit...10-1 odds are type f is whats in it..wish there was a way to tell for sure...guess a drain and fill is in order

 

[Dr.Jass]

I believe it... however, if it's the original fluid there's no way it's got ATF+3 in it. That didn't appear until the mid-90s. Prior to that, though Mopar had their own part number, spec, etc. it was just Dexron I/II/III in the bottle. Chrysler never used Type F, and warned against mixing it into trannies filled with factory fluid. I honestly doubt it would really hurt much if anything, but I wouldn't do it anyhow.

 

[69.5CUDA]

it got a filter and flush umm....too long ago to remember..probably back when i was racing it down at the track...thus why ive forgotten what fluid is in it.....6 or more 7-1/4 rears 2 engines a shattered k member and full front end later and that trans still goes strong