View Poll Results: Which fluid is best for a M12 T56?
Redline D4 ATF
53
8.85%
Royal Purple Syncromax
179
29.88%
GM Syncromesh
154
25.71%
OEM Dexron III ATF
213
35.56%
Voters: 599. You may not vote on this poll
Which T56 fluid?
Originally Posted by chucky2
Personally, I'd rather have it start leaking a little bit so I could take care of it, rather than run dino and have the whole thing just die a bad death one day (anyone seen that thread with the melted gears? 
)
Chuck
)Chuck
I haven't see the thread with the melted gears, you have a link?? Sounds interesting, what happened, got too hot at the track running dino oil??
On The Tree
Joined: Jan 2004
Posts: 114
Likes: 0
From: Chicagoland, IL USA
Domestic Demon- That thread would be here:
No lube = T56 MELTDOWN! Pics...
Just to be clear, my point wasn't that a dino T-56 lube will cause this, rather, bur rather loosing a seal could cause this.
Chuck
No lube = T56 MELTDOWN! Pics...
Just to be clear, my point wasn't that a dino T-56 lube will cause this, rather, bur rather loosing a seal could cause this.
Chuck
Originally Posted by Deeavi
I have done alot of research on engine oils and ATF. Mobil1 and Amsoil fully synthetics are the best!
Robert
I had a conversation with the guys at keisler on the power tour about this. A friend was having a problem with a T56 he got from a shop online (very good reputation) and this is what was suggested. They have the guy who designed the T56. He said to use dextron. He explained it to me, the syncros use the weight of the fluid to effect the speeds of the blocker rings and speed gears. If you use a lighter of heavier fluid it will effect the operation of the syncros. I use dextron in mine and it's at the track 2-3 days a week. I check the fluid regularly and change as needed.
Originally Posted by yellowbird1232
I had a conversation with the guys at keisler on the power tour about this. A friend was having a problem with a T56 he got from a shop online (very good reputation) and this is what was suggested. They have the guy who designed the T56. He said to use dextron. He explained it to me, the syncros use the weight of the fluid to effect the speeds of the blocker rings and speed gears. If you use a lighter of heavier fluid it will effect the operation of the syncros. I use dextron in mine and it's at the track 2-3 days a week. I check the fluid regularly and change as needed.
Its even imprinted on the trans case to use DEXRON III ATF, and I don't think they just put that on there for the hell of it
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
still trying to understand this all.
Is RP Synchromax Synthetic? does it have dextron III?
I dunno what the hell to buy now. So many different opinions on this thread.
Im either leaning on RP Synchromax or Mobil 1 ATF.
Is RP Synchromax Synthetic? does it have dextron III?
I dunno what the hell to buy now. So many different opinions on this thread.
Im either leaning on RP Synchromax or Mobil 1 ATF.
RP Synchromax is synthetic, and it meets the Dexron III spec.
I just put Mobil 1 ATF in my freshly rebuilt T-56 from Joe and Amber (T-56 Rebuilds), and I'm VERY pleased with the results.
I just put Mobil 1 ATF in my freshly rebuilt T-56 from Joe and Amber (T-56 Rebuilds), and I'm VERY pleased with the results.
t56 rebuilds recommended mobil 1 atf for me.
also, lately i heard that tremec will only warranty damages if this fluid is run.
i ran synchromesh for about 500 miles and switched to mobil 1 ATF
also, lately i heard that tremec will only warranty damages if this fluid is run.
i ran synchromesh for about 500 miles and switched to mobil 1 ATF
12 Second Club
Joined: Sep 2005
Posts: 4,273
Likes: 0
From: Bucks County, Pa.
Originally Posted by MeentSS02
RP Synchromax is synthetic, and it meets the Dexron III spec.
I just put Mobil 1 ATF in my freshly rebuilt T-56 from Joe and Amber (T-56 Rebuilds), and I'm VERY pleased with the results.
I just put Mobil 1 ATF in my freshly rebuilt T-56 from Joe and Amber (T-56 Rebuilds), and I'm VERY pleased with the results.
Originally Posted by dailydriver
Did you have problems with the Specialty Formulations stuff?? Could it have contributed to the recent rebuild???
Got tired of it one day, and decided to do a rebuild.I ran the S.F. MTF Glide as the first fill in this new transmission, and it did very well. The only reason I switched it out was because I wanted to change the trans oil after about 1k miles just to make sure everything was okay (and it was). Joe and Amber (T56 Rebuilds) recommended the Mobil 1 ATF, and after looking at its properties compared to a lot of others out there, it seemed to be a pretty good match. The added benefit of being able to pick it up at my local Auto Zone for ~$6.00/quart was nice too
Overall, slow speed driving is just a LITTLE smoother with the Mobil 1, and hard shifting is the same to me.
On The Tree
Joined: Jan 2006
Posts: 115
Likes: 0
From: Jersey
All these fluids and not one mention of Dex/Merc V....the Dex III replacement? The bottle states that it's a synthetic blend that conforms with DEX III and III E specifications. We threw a few quarts in our trans...I'll let you know
On The Tree
Joined: Jan 2004
Posts: 114
Likes: 0
From: Chicagoland, IL USA
Rabidbandit- Mercon (and whatever roman numeral that follows it) is not a GM spec and will probably never be referenced by GM. I know you said Mercon V, however did you mean you put in GM's new Dexron VI?
The new Dexron VI starts at a lower cst @ 100C than Dexron III, 6.0 vs. approx. 7.5, so if that's what you're talking about, then you have a fluid with less viscosity than spec'd for. Whether or not that would be a problem is hard to tell...Dexron III is rumored to shear down, so if the new Dexron is more shear stable, does that really matter? Maybe getting a hold of the Dexron VI spec. would be a good idea here...
If you really meant you're running Mercon V, then you could be one of the first (if you're actually running just Mecron V and not a dual rated fluid)...it seems that most that go outside of the dino Dexron III spec. go for something more....hardcore (for lack of a better word)....fluid...
Chuck
The new Dexron VI starts at a lower cst @ 100C than Dexron III, 6.0 vs. approx. 7.5, so if that's what you're talking about, then you have a fluid with less viscosity than spec'd for. Whether or not that would be a problem is hard to tell...Dexron III is rumored to shear down, so if the new Dexron is more shear stable, does that really matter? Maybe getting a hold of the Dexron VI spec. would be a good idea here...
If you really meant you're running Mercon V, then you could be one of the first (if you're actually running just Mecron V and not a dual rated fluid)...it seems that most that go outside of the dino Dexron III spec. go for something more....hardcore (for lack of a better word)....fluid...
Chuck
On The Tree
Joined: Jan 2006
Posts: 115
Likes: 0
From: Jersey
My bad...I was hearing everyone spouting off Dex III...Dex III...I assumed Anyway we have been using Advance Autoparts ATF with no problems except for some notchy shifting. Wear isn't even a factor...the damn trans is tight as hell after 50k and no shavings...(I filter through cheese cloth when draining)...and the new stuff is Valvoline Dextron/Mercon V...yes ford fluid. Willing to gamble according to the bottle...it has the same or better specs than the regular ATF that we have been running. It's seems to be a higher weight although without specifics...I could be wrong. I've been running it in my 4L60E in my blazer and tranfercase as well. It accually shifts better (less shudder) and temps are cooler...according to my little guage. If it works in that pile of crap and hasn't toasted the bands after 15k of heavy towing...then I thinks it's a safe bet...any thoughts I just tired of people thinking that you have to spend $15+ a freakin quart of synthetic-super-duper-fiction-eliminator to ease your mind of a trans failing. Do you think they had that crap back in the day runnin' down the track...uuuhh nope. I'm tryin' something new dammit 
Edit: Found the specs:
Viscosity
cSt @ 100ºC 7.5
cP @ -40ºC (-40ºF) 10,500
Flash Point, ºC (ºF) 206 (403)
Pour Point, ºC (ºF) -55 (-67)
Gravity, API 34.1
Color Red
Mercon V satisfies Ford's new Mercon V specification, Ford Mercon and General Motors' Dexron-III, Dexron-IIE, or Dexron II specifications.
Mercon V is also acceptable in any Audi, Honda, Mazda, Nissan, Opel, Renault, Toyota and Volkswagen transmissions that require a Dexron-III, Dexron-IIE or Dexron-II type fluid
Anyway we have been using Advance Autoparts ATF with no problems except for some notchy shifting. Wear isn't even a factor...the damn trans is tight as hell after 50k and no shavings...(I filter through cheese cloth when draining)...and the new stuff is Valvoline Dextron/Mercon V...yes ford fluid. Willing to gamble according to the bottle...it has the same or better specs than the regular ATF that we have been running. It's seems to be a higher weight although without specifics...I could be wrong. I've been running it in my 4L60E in my blazer and tranfercase as well. It accually shifts better (less shudder) and temps are cooler...according to my little guage. If it works in that pile of crap and hasn't toasted the bands after 15k of heavy towing...then I thinks it's a safe bet...any thoughts I just tired of people thinking that you have to spend $15+ a freakin quart of synthetic-super-duper-fiction-eliminator to ease your mind of a trans failing. Do you think they had that crap back in the day runnin' down the track...uuuhh nope. I'm tryin' something new dammit Edit: Found the specs:
Viscosity
cSt @ 100ºC 7.5
cP @ -40ºC (-40ºF) 10,500
Flash Point, ºC (ºF) 206 (403)
Pour Point, ºC (ºF) -55 (-67)
Gravity, API 34.1
Color Red
Mercon V satisfies Ford's new Mercon V specification, Ford Mercon and General Motors' Dexron-III, Dexron-IIE, or Dexron II specifications.
Mercon V is also acceptable in any Audi, Honda, Mazda, Nissan, Opel, Renault, Toyota and Volkswagen transmissions that require a Dexron-III, Dexron-IIE or Dexron-II type fluid
Last edited by Rabidbandit; Oct 11, 2006 at 03:11 PM.
On The Tree
Joined: Jan 2004
Posts: 114
Likes: 0
From: Chicagoland, IL USA
Rabidbandit- Looks like that would be fine running that in place of a dino Dexron III...I'm sure a Mercon V rated fluid has somewhat better basestocks than a just making it dino Dexron III rated fluid (especially the ones not H rated), so at the minimum, you should have at least a somewhat hardier fluid in there.
Hope it works out great!
Chuck
Hope it works out great!
Chuck