HighHopes85

I think it might have been in either one of my 350 THM books or my 700R4 repair manual...

Does Type F tranny fluid have more friction modifiers in it than good ole factory recommended Dexron III, and if so, don't GM and Ford use the same paper-ish material on the clutches???

Romeo Barrera

Some tranny Guru on the F-body forum confirmed that Type-F does have more friction modifiers, but not to use them in your GM auto trannies. I don't know about the clutch material.

gmvette1

i've been running type f in my 88 for over a year now no problem at all. my trans guy said that it's better for the clutches & bands. :cheers:

arnold

Maybe a search can be conducted on the F-body forum to find thread and the reason
for that thinking.

HighHopes85

Sorry about the dupe post then...I never ventured to the F-body forum. Must have been a coincidence that I brought it up around the same time. Just saw lots of people talking about playing with the TV cable and buying expensive B&M fluid, so I thought it would have been an appropriate time.

I guess next time I have a question about buying new carpet, I should look in the 'Wheels and Tires' section :rolleyes: Thanks, -Matt-

Romeo Barrera

Pro Built Automatics
Member
Posts: 610
From: Calimesa, California, U.S.
Registered: Jul 1999
posted December 01, 2000 03:17 PM
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The type "F" was designed for use with Asbestos clutches, the type found in Ford till 1977. From then on paper type clutches are used in everything. According to Borg Warner, Raybestoes, & Hydramatic, the type "F" fluid has apx. 12-17% less holding power on dynamic clutches and bands when compared to approved Dexron 3. Ford type "F" has more static holding power,(neutral to drive) but this is not a problem with any 700R4 or 2004R transmission. When GM transmissions come in that have ran type "F" fluid, we have seen faster wear on parts. I would stay away from type "F", B&M Trick Shift or equvilant. If you like synthetics use Amsoil (best) or Red Line (2nd best).
Hope This Helps!!!


[Modified by Romeo Barrera, 10:06 PM 11/27/2001]

HighHopes85

Awesome. Thanks. :cheers: -Matt-

arnold

It's cool HighHopes. I thot it was a good post. Actually, my post was in
response to Romeo. Hey, we got Romeo to come back with a good follow-up,
didn't we. :D

Jim-K

I just bought 12 qts of Mobil 1 ATF for a new Tranny Doctor TH700R4 thats sitting on the garage floor at the moment. 50 bux :eek:*whew*:eek: Sure hope its worth it.

Jim-K