727 trans oil -What are you using?

Type F here.

For a mostly stock torqueflite, I agree type F has its use. But my trans has 5 frictions in the front drum, and 165 psi line pressure. It doesn't need the extra friction of the type F, and I believe (hope?) Dexron will lubricate better.

And if you only change the fluid once a year (or less), I agree a name brand fluid would be my choice over a store brand.

My last fluid change, Castrol ATF was on sale almost as cheap as the store brand, so I bought the Castrol. Even though normally I use the cheap stuff. I put 7 qts in my setup when I change the fluid and filter every 30-40 passes, and my trans looks good inside (several inspections over the years). So, I am not spending $8-12/qt on fancy ATF. Have you seen the price of Royal Purple ATF?

If there is a lube issue, hp level dictates roller. I am still using type f in my 5 clutch unit. I don't see any issues with more coefficient. Most 727's I see have front clutch heat check issues, which indicates lack thereof, or clearance issues. I have gone to clearances that were verboten 20 years ago.

Cheapo type F here

I agree many 727 builds have front clutch issues. But my setup doesn't (and it sounds like yours doesn't either). I like the 5 friction setup (high torque, race, application).

What front clutch clearance are you running? I have settled on 0.075", but have run down to 0.060".

John Force's favorite here....Castrol GTX Type F

one more with TF, here.

Type F

Coming from the "keep it at .050" days, it was hard (25 years of .0125 per disc) to start seeing .075-.080 It makes snap ring/oversize steel selection a breeze. I'm anal, so it would sometimes take me a couple of hours, and sometimes machine shop expense, to arrive at .050.

Dex 3,prefer name brand

Type F here too. I also subsitute 1 qt of 30w for a qt of trans fluid. If it ain't broke, don't be trying fix it.
Brian

I run a 904 and Type F

904 Mobil 1 ATF w/Lucas additive. About 20* cooler w/ y trans brake.

dexron/mercon 5 in mine.

I've seen the fluid issue debated many times. Many testimonials for mercon derivatives, and type F fluids.


Personally, I think that over all these years of torqueflight use, by many different party's, one thing has been proven.... That A 727 doesn't care what fluid you use AS LONG as it was built right

Cheapo (beacause it leaks ) type F as well.

autozone/advance auto type F. been running it since rebuilt in 2003 and still going strong.

727 6 clutches, billet steel drum, dex3 as per trans builders suggestion. sometimes doing the rounds the trans gets hot but you'd never guess with smelling my fluid. i did try type F but trans man said no so dex 3 it is.

Duraguard universal hydraulic fluid !!!!!
its thicker werks grate for high HP.

tranny been bulit proof for 4 years till now the T brake solenoid quit.

Yup but it also makes converter slip less!!!

Type F since 1973 when we ran a Art Carr trans,Marv ripes at A-1 trans says type F in 727, Dave Smitth at Pro Trans says type F with no trans brake. Mopar engineers in the old drag racing seminars said type F also

Nothing but cheapo type-F

Rickster