I was told to use this fluid for my t56, what say you? - LS1TECH - Camaro and Firebird Forum Discussion



Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters
Sponsored by:
Sponsored by:

I was told to use this fluid for my t56, what say you?

Reply
 
Thread Tools Search this Thread
Old 02-27-2017, 10:59 AM   #1
12 Second Club
Thread Starter
 
Mappinsj's Avatar
 
Join Date: Nov 2014
Posts: 808
Default I was told to use this fluid for my t56, what say you?

look, I just want to know what the forum thinks about this fluid in t56 since there is no reliable recent source that explicitly states what fluid is called for

Name:  mobil-1-synthetic-atf-fluid_zpswonwzcyp.png
Views: 91
Size:  90.7 KB

Mobile 1 synthetic automatic transmission fluid

Last edited by Mappinsj; 02-28-2017 at 10:28 AM. Reason: non-sponsor soliciting
Mappinsj is offline   Reply With Quote
Old 02-27-2017, 12:24 PM   #2
TECH Fanatic
iTrader: (6)
 
Join Date: Oct 2002
Location: Detroit metro area
Posts: 1,929
Default

That is the manufacturer's choice.
calhoon is offline   Reply With Quote
Old 02-27-2017, 05:49 PM   #3
TECH Addict
iTrader: (14)
 
chrysler kid's Avatar
 
Join Date: Feb 2005
Location: Mckinney Plano Frisco
Posts: 2,639
Default

Any dexron3 atf is more than acceptable.
chrysler kid is offline   Reply With Quote
Old 02-27-2017, 06:27 PM   #4
TECH Junkie
 
Join Date: Apr 2008
Posts: 3,598
Default

I would just use whatever the sticker next to the fill plug on tranny says or what is listed in owners manual.

If those say a synthetic ATF than the Mobil 1 is good stuff

I recall Tremac started using the carbon blocker rings in T56 99 or 2000. Previous was paper blocker rings and synthetics did not get along with those.
BALLSS is offline   Reply With Quote
Old 02-27-2017, 09:30 PM   #5
Pontiacerator
iTrader: (12)
 
RevGTO's Avatar
 
Join Date: Nov 2003
Location: Wichita KS / Rancho San Diego
Posts: 5,150
Default

https://ls1tech.com/forums/manual-tr...ghlight=Tremec

I concur with advice from Tremec tech support in the thread. I got some grinding on cold mornings when I replaced the original fill with Mobil 1 synthetic. Got better after switching back to Dex III.
RevGTO is offline   Reply With Quote
Old 02-27-2017, 09:50 PM   #6
12 Second Club
Thread Starter
 
Mappinsj's Avatar
 
Join Date: Nov 2014
Posts: 808
Default

I have a carbon ring blocker kit. I was told paper doesn't like syn and carbon does
Mappinsj is offline   Reply With Quote
Old 02-27-2017, 10:37 PM   #7
10 Second Club
iTrader: (2)
 
Darth_V8r's Avatar
 
Join Date: Jul 2014
Location: My own internal universe
Posts: 5,057
Default

Mappy my tranny was built by RPM. They said to use royal purple synchromax or AMSoil torquedrive.
Darth_V8r is offline   Reply With Quote
Old 02-27-2017, 10:59 PM   #8
TECH Enthusiast
iTrader: (5)
 
Join Date: May 2009
Location: clear lake, Texas
Posts: 598
Default

I just put penzoil synchromesh in mine, shifts like butter now.
whatsa347 is offline   Reply With Quote
Old 02-28-2017, 01:15 PM   #9
12 Second Club
Thread Starter
 
Mappinsj's Avatar
 
Join Date: Nov 2014
Posts: 808
Default

It seems that M1 syn ATF is good for carbon ring blockers, (which my car has), and not paper. I think I am gonna go ahead and get this stuff.
Mappinsj is offline   Reply With Quote
Old 02-28-2017, 07:37 PM   #10
12 Second Club
Thread Starter
 
Mappinsj's Avatar
 
Join Date: Nov 2014
Posts: 808
Default

Quote:
Originally Posted by RevGTO View Post
https://ls1tech.com/forums/manual-tr...ghlight=Tremec

I concur with advice from Tremec tech support in the thread. I got some grinding on cold mornings when I replaced the original fill with Mobil 1 synthetic. Got better after switching back to Dex III.
After researching this for hours (simply because I want the right stuff)
I have come to the conclusion that Dextron VI is not the same as Dextron III and Tremec on their website FAQ recommends Dextron III for all their transmissions save the TKO 5 speed.

I have found that they actually recommend AGAINST all synthetic fluid


I will be buying Dex III for my t56 as it is still for sale separate from Dex VI.
Mappinsj is offline   Reply With Quote
Old 03-01-2017, 08:07 PM   #11
TECH Addict
iTrader: (14)
 
chrysler kid's Avatar
 
Join Date: Feb 2005
Location: Mckinney Plano Frisco
Posts: 2,639
Default

Dexron III is the best fluid to use.
chrysler kid is offline   Reply With Quote
Old 03-02-2017, 08:43 AM   #12
TECH Fanatic
iTrader: (17)
 
AAIIIC's Avatar
 
Join Date: Aug 2007
Location: Where the Navy tells me to go
Posts: 1,759
Default

Quote:
Originally Posted by Mappinsj View Post
Mobile 1 synthetic automatic transmission fluid
Is that the special Alabama formulation?
AAIIIC is offline   Reply With Quote
Old 03-03-2017, 08:06 AM   #13
12 Second Club
Thread Starter
 
Mappinsj's Avatar
 
Join Date: Nov 2014
Posts: 808
Default

Quote:
Originally Posted by AAIIIC View Post
Is that the special Alabama formulation?
hahahaha i was made when I was typing it, they took my link down I was using for reference because it was wrong website. Its fair though lol
Mappinsj is offline   Reply With Quote
Old 03-04-2017, 08:38 PM   #14
TECH Enthusiast
 
Join Date: Nov 2011
Location: Connecticut SE shore
Posts: 561
Default

I've done this "what fluid" drill twice in the past 5 years and keep coming back to Dex 3. And since I have paper lined friction rings, I stick with conventional fluids. Currently using the GM Man Trans Lube 88861800, which is a beefed up ATF with slightly more anti-wear chemicals than base line conventionals. That's a good choice in your car too, even if it shears down fairly quick. I just change mine every 4K miles to ensure it stays above the 6.4 cSt range. It's a factory fill in many older Corvette T56's and meant for life. Hard to believe that as it probably shears down under 5.0 cSt by 20K-100K miles.

https://ls1tech.com/forums/manual-tr...56-others.html ....my 2 cents from 2016.

The other synthetic ATFs (Amsoil ATD, Redline D4, M1 ATF, RP Synchromax, Honda D1) are good choices too. And they don't shear near as much as conventionals. The Pennzoil synchromesh is a notch higher in protection as it's a true GL4 manual trans lubricant with visc around 9.3 cSt. That ATFs are around 7.1-7.6. Though note that synchro ring operation is directly affected by viscosity. If I had the carbon rings in my car I'd probably try some of those synthetic ATF's as they have beefier add packs than the GM MTL ATF. You will find numerous threads on the internet of people having great results with all these fluids. You will also find people having negative results with all of them, except the conventional Dex 3's. The Dex 6's tend to be around a 6.0 cSt viscosity. Valvoline Max Life ATF has a solid add pack and doesn't shear hardly at all, but viscosity is 5.9 new. Too low imo and GM cautions against using it in any car they specced for manual transmission fluid.

Last edited by Firebrian; 03-04-2017 at 09:33 PM.
Firebrian is offline   Reply With Quote
Old 03-05-2017, 02:22 PM   #15
Pontiacerator
iTrader: (12)
 
RevGTO's Avatar
 
Join Date: Nov 2003
Location: Wichita KS / Rancho San Diego
Posts: 5,150
Default

Quote:
Originally Posted by Firebrian View Post
I've done this "what fluid" drill twice in the past 5 years and keep coming back to Dex 3. I just change mine every 4K miles to ensure it stays above the 6.4 cSt range. It's a factory fill in many older Corvette T56's and meant for life. Hard to believe that as it probably shears down under 5.0 cSt by 20K-100K miles.
I bought my first M6 T/A with about 80k. It was shifting just fine, but I promptly changed out the factory fill to M1 ATF and started getting the 2nd gear cold grind. Switched back to Dex III and it got better, but it never seemed to shift quite as smoothly as it did before I changed it.

My current M6 has 91k and I'm sure is on the factory fill. It shifts like a hot knife through butter. Common sense tells me that the fluid must be sheared down, but based on previous experience, I'm scared to change it. Maybe it's like an old automatic where the sludge is holding it together, lol. If it ain't broke, don't fix it?
RevGTO is offline   Reply With Quote
Old 03-06-2017, 12:46 AM   #16
TECH Enthusiast
 
Join Date: Nov 2011
Location: Connecticut SE shore
Posts: 561
Default

Quote:
Originally Posted by RevGTO View Post
My current M6 has 91k and I'm sure is on the factory fill. It shifts like a hot knife through butter. Common sense tells me that the fluid must be sheared down, but based on previous experience, I'm scared to change it. Maybe it's like an old automatic where the sludge is holding it together, lol. If it ain't broke, don't fix it?
I can only say that when I bought my car in 2012 it still had factory fill in it though only on 12,000 miles. I changed it just due to age and not knowing for sure what condition it was in. It shifted just fine too. It looked fine coming out. Put regular Valvoline Dex 3 in and there was almost zero difference in shift quality. Though I felt it was maybe 10% improved? That could have been the Placebo affect too. But it surely was not worse. Changed it again 4 years later and no difference with the new stuff.

One advantage to getting the factory fill out is to remove whatever metal wear/break-in particles might be swimming around in your fluid. At 91K I'd take the risk and change it with GM factory approved MTL/Dex 3.
Firebrian is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
FTI 3200 stall converter, 400 horsepower rating Mappinsj Parts Classifieds 15 04-17-2017 05:16 PM
2000 Camaro SS after M6 swap Mappinsj Drag Racing Results 2 03-20-2017 01:27 PM
New Precision 7475 8UALIVE Parts Classifieds 23 02-22-2017 12:46 AM
6l80e for sale 8UALIVE Parts Classifieds 12 11-10-2016 12:11 AM
1994 Trans Am 10K Miles! StevenUniverse Vehicle Classifieds 7 10-04-2016 11:22 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:58 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: