What type of transmission fluid?

[1of1547]

I have a Turbo 350 with a B&M 3000 Holeshot stall converter in my Regal. The instuction sheet for the converter calls for Type FA transmission fluid. But I overheard a ATI transmission spokesman recommend only Dextron Type III. He was telling a customer that the only reason people recommend Type FA is because it will make the transmission shift harder. He basically said that the Dextron will lubricate alot better than the Type FA. I was wondering if this was true. I would rather make the transmission last longer rather than chirping 2nd gear.

 

[rick richardson]

how about the 2004r

 

[HOTTOGO]

Here's one link....

http://www.turbobuick.com/forums/showthread.php?s=&threadid=1540&highlight=tractor+fluid
Try a search on here it has been thoughly discussed many times.

 

[Clay Thompson]

AEEEEEEEEEEEEE

Not another transmission fluid question.

 

[1of1547]

The original Turbo 200r4 is on the shelf beside the original block. They are numbers matching so I do not want to destroy them. in the past I have been very good at blowing things up. Besides I could not afford to rebuild the Turbo 200r4 at this time. Thanks for the link Mark that answered my question. Sorry Clay I didn't know it was a touchy subject. Thanks again to everybody who responded.

 

[WE4]

LOLOLOLOL

Clay, tonight you have me cracking up. You just seem to have this knack of pissing people off. ROFL

I really wish they knew you better so they could appreciate the humor in it as I do !!!!

If they only knew.........LOL

and most of all...
1of1547....... DO NOT take it personal in any way.! He is an assshole to all, AND you should hear him bust my balls!!!!!!!!!!! ROFL

Bruce
WE4

 

[1of1547]

I am by no means pissed off. Normally when you see something like that, something is going on. Sorta like a downpipe or clear taillight lenses. I takes alot to get me fired up. It takes a smart ass to understand a smart ass I just didn't want to be in the middle of the crossfire. Thanks again guys!!!

 

[Clay Thompson]

Trannie fluid question

The most often asked question on the site. A search will provide more info than you can digest.

My recommendation, Amsoil--not a popular one but my position is explained in detail in other threads.

 

[pitoturbo]

HOW ABOUT AMSOIL HDY FLUID SYNT DID ANYBODY USE IT

 

[MARINES185]

since no one answered your question, i will. all gm transmissions
that i no of (automatic) require a dexron trans fluid. this is
how gm got smooth shifts on there cars. the dexron allows
for more slippage between the clutches. type f fluid as used
by ford will not slip as much as dexron. you can run type f in
gm trans but you must get every bit of dexron out even in the
converter. type f is very similar to the ''hi performance'' trans
fluid sold by b&m and other manufactures.

 

[Scott231]

Not! You can mix and match the fluids. The differences are minimal. As with 99% of the questions asked in Turbo Buick forums, the answer is: it depends.

As Sarge said, Dexron is more likely to produce smoother shifts (but I doubt you'll notice it); Type-F is more likely to produce quicker shifts (but I doubt you'll notice it). Both are red oils

The Mobil 424 or Coastal Hi Torque Tractor Fluids are less likely to burn. Last Friday during TestnTune, I had a 14-second Mustange try to burn me down (or possibly he was just an idiot and afraid to go into the lights). After sitting on the trans brake for about 6 seconds under boost, my Dexron tranny fluid turned to a gross brown substance that smells like burnt molasses.

 

[tom h]

Originally posted by Scott231
The Mobil 424 or Coastal Hi Torque Tractor Fluids are less likely to burn. ... After sitting on the trans brake for about 6 seconds under boost, my Dexron tranny fluid turned to a gross brown substance that smells like burnt molasses.

here's an interesting comparison of physical properties, from the Mobil web site:

Flash Point, °C (°F), ASTM D 92
Mobil Multi-Purpose ATF , 370°F
Mobil 1 Synthetic ATF , 428°F
Mobilfluid 424 , 442°F

viscosity, cSt at 100°C
Mobil Multi-Purpose ATF , 7.5
Mobil 1 Synthetic ATF , 7.6
Mobilfluid 424 , 9.3

From the flash points it appears 424 fluid is thermally lots more stable than ordinary ATF, and comparable to Synthetic ATF.

424 fluid appears significantly "thicker" than regular or synthetic ATF.

I'd read here about mixing regular ATF with Mobil 424. To preserve maximum temeprature stability it'd seem best to use straight 424 fluid -- otherwise the regular ATF would be the weak link and burn/sludge first.

Is there any reason NOT to use straight 424 fluid??

how much does 424 cost? it's bound to be cheaper than the $6 per qt of Mobil synthetic ATF, yes?

 

[Roc87]

From a local distributor here in town its around $35 for 5 gallons of it. so.....4qts. per gallon = 20 quarts. Its about $1.75 per quart.

 

[HOTTOGO]

Originally posted by tom h
From the flash points it appears 424 fluid is thermally lots more stable than ordinary ATF, and comparable to Synthetic ATF.

I'd read here about mixing regular ATF with Mobil 424. To preserve maximum temeprature stability it'd seem best to use straight 424 fluid -- otherwise the regular ATF would be the weak link and burn/sludge first.

Is there any reason NOT to use straight 424 fluid??

There's no reason you can't run it straight, mixing atf is just for coloring. I doubt the 2qts of atf to 10qts of tractor fluid will hurt the stability though. If your gonna get the tranny that hot I think your bound to have other probs then just burnt oil, ie; seals, band, clutches burnt and a life of less than half of what it should be.