What fluid should I use in my T-56 as per Tremec techincal support
06-16-2015, 10:53 AM
#83
People mentioning which fluid they've tried would be more useful if the mentioned if they were using carbon or paper blockers.
Personally, Redline ATF and Amsoil ATF have served me well with carbon blockers. Normal dex iii was pretty good but not great. Dex vi and synchromesh did not work well.
Personally, Redline ATF and Amsoil ATF have served me well with carbon blockers. Normal dex iii was pretty good but not great. Dex vi and synchromesh did not work well.
06-16-2015, 12:08 PM
#84
TECH Resident
People mentioning which fluid they've tried would be more useful if the mentioned if they were using carbon or paper blockers.
Personally, Redline ATF and Amsoil ATF have served me well with carbon blockers. Normal dex iii was pretty good but not great. Dex vi and synchromesh did not work well.
Personally, Redline ATF and Amsoil ATF have served me well with carbon blockers. Normal dex iii was pretty good but not great. Dex vi and synchromesh did not work well.
I know I have a 2001.... But I couldn't tell you what the transmission has as its all original (unless it's labeled on the housing?)
06-17-2015, 04:23 PM
#87
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06-29-2015, 03:09 PM
#88
My 99 TA had the factory fill fluid in the T-56 for 90,000 miles from Feb 1999 to July 2008. Shifted ok.
Switched to Mobile 1 synthetic ATF in July 2008 and currently running it. I felt the T-56 shifted better with the Mobile 1 synthetic. The car isn't driven in cold weather conditions. Car has 138,xxx miles on it and shifts better in my opinion than other f-bodies (98-02) with stock fluid I've driven over the years.
Switched to Mobile 1 synthetic ATF in July 2008 and currently running it. I felt the T-56 shifted better with the Mobile 1 synthetic. The car isn't driven in cold weather conditions. Car has 138,xxx miles on it and shifts better in my opinion than other f-bodies (98-02) with stock fluid I've driven over the years.
06-29-2015, 11:42 PM
#89
I had the opposite experience with M1 ATF in my 01 TA, like you, at about 90k. Changed out the factory fill with it and then noticed grinding on cold mornings, and more notchiness in general. Went back to Dex III and it improved, but it still wasn't as good as it was with the factory fill.
07-21-2015, 06:18 PM
#91
TECH Resident
So, I ended up using the castrol; but now I notice a bit more whine (I'm assuming it's th transmission, and hoping it's not something to do with the heads/cam install).
I used 4 quarts, ran it for a 100 miles.... But the whine was so noticeable I decided to double check the level (I originally filled thru the shifter).
It poured out about a cup or two from the fill tube. I ran it with just that, but still whine.
I'm wondering if it'll be worth my while hunting down the GM stuff.
I used 4 quarts, ran it for a 100 miles.... But the whine was so noticeable I decided to double check the level (I originally filled thru the shifter).
It poured out about a cup or two from the fill tube. I ran it with just that, but still whine.
I'm wondering if it'll be worth my while hunting down the GM stuff.
07-23-2015, 07:05 PM
#92
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I was at Fleet Farm and they had Amsoil ATF, so I am running that. Shifts nice and the transmission is really quiet. So far so good. It was like 11 bucks per quart and I dumped in 4 quarts through the shifter.
Andrew
Andrew
07-23-2015, 10:19 PM
#94
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Anybody tried transyn atf? It is the **** sucker deluxe fluid for a stock allison transmission and ahat i run in mine behind my duramax. It is synthetic.
I will be filling my t56 with it when my nova finally runs, its a used transmission though so i cant gaurantee what kind of shape it is in.
I will be filling my t56 with it when my nova finally runs, its a used transmission though so i cant gaurantee what kind of shape it is in.
08-14-2015, 06:11 PM
#95
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Anyone have any feedback on the GM Fluid 88861800 Manual Transmission Fluid? Some people on amazon said they use it in their T-56
I found this http://www.cadillacfaq.com/faq/tsb/data/pip3836.pdf
So I am thinking of running this GM fluid in my T-56. It has 59,xxx miles I was planning on changing it at 60,000. My ws6 owners manual says the T-56 fluid doesn't need changed but I don't believe that. It is sometimes notchy going into reverse
I found this http://www.cadillacfaq.com/faq/tsb/data/pip3836.pdf
So I am thinking of running this GM fluid in my T-56. It has 59,xxx miles I was planning on changing it at 60,000. My ws6 owners manual says the T-56 fluid doesn't need changed but I don't believe that. It is sometimes notchy going into reverse
08-14-2015, 11:41 PM
#96
TECH Enthusiast
I'm sure that GM fluid is fine. It's probably just repackaged ATF DEX 3 anyways. As DEX 3 is phased out or licensing agreements change, so will the latest packaging. ATF DEX 3 was fine for out T56's 10-15 years ago, it should still be fine today. I would suspect the GM product costs more than DEX 3. Tremec still has the same recommendations which is probably more important.
If you have 59K miles on your DEX 3 I'd change it despite the owner's manual suggesting it is fine for life. It might be. My T56 fluid was 13 years old with 13K miles when I got my car. It made sense to change it just based on age. It looked fine though.
If you have 59K miles on your DEX 3 I'd change it despite the owner's manual suggesting it is fine for life. It might be. My T56 fluid was 13 years old with 13K miles when I got my car. It made sense to change it just based on age. It looked fine though.
08-16-2015, 01:29 PM
#97
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Anyone have any feedback on the GM Fluid 88861800 Manual Transmission Fluid? Some people on amazon said they use it in their T-56
I found this http://www.cadillacfaq.com/faq/tsb/data/pip3836.pdf
So I am thinking of running this GM fluid in my T-56. It has 59,xxx miles I was planning on changing it at 60,000. My ws6 owners manual says the T-56 fluid doesn't need changed but I don't believe that. It is sometimes notchy going into reverse
I found this http://www.cadillacfaq.com/faq/tsb/data/pip3836.pdf
So I am thinking of running this GM fluid in my T-56. It has 59,xxx miles I was planning on changing it at 60,000. My ws6 owners manual says the T-56 fluid doesn't need changed but I don't believe that. It is sometimes notchy going into reverse
Andrew
07-31-2016, 05:04 PM
#98
I see a lot of questions on here asking about what trans fluid should be used in the t-56. I called up Tremec technical support to get the final answer.
-Dexron III is THE most highly recommended all round choice, specifically Texaco/Havoline brand.
-Dexron VI- Still being evaluated and tested, NOT recommended for the T-56 at this time and has caused issues so far in preliminary evaluation.
-Syncromesh- Not really recommended, but can be used in high temp high stress applications(drag racing, very hot climates etc.) since it is thicker than dexron III for some added protection.
-Synthetic- Mobil 1 is the only brand advisable to use and tested by Tremec, can cause shifting issues in colder climates.
So there you go, straight from the manufacturer.
-Dexron III is THE most highly recommended all round choice, specifically Texaco/Havoline brand.
-Dexron VI- Still being evaluated and tested, NOT recommended for the T-56 at this time and has caused issues so far in preliminary evaluation.
-Syncromesh- Not really recommended, but can be used in high temp high stress applications(drag racing, very hot climates etc.) since it is thicker than dexron III for some added protection.
-Synthetic- Mobil 1 is the only brand advisable to use and tested by Tremec, can cause shifting issues in colder climates.
So there you go, straight from the manufacturer.
DEXRON VI is only a recommended replacement for the A4. Tremec is still specifying the DEXRON-lll for the T56 as well as the altered TR-6060 I just upgraded to in my '04.
This of course is a factory new unit rather than modified, and would mean the Dex/Merc branded version now.
Whatever you choose, I would advise by experience that you do not switch back and forth....my modified T56 had Mobil1 but had issues in colder temps. Went to friction modified Syncromesh, then the modifiers recommendation of RP...synchronizers had enough by then!
Last edited by somethingelse; 07-31-2016 at 05:13 PM.
08-01-2016, 11:04 AM
#99
Tremac used paper blocker rings until 98 IIRC in the T56. Synthetics, over time, started to break down the paper. tremac switched to carbon blocker rings around 98 so using synthetics for those later versions was not a problem relative to the paper ones.
Tremac does not test every brand of fluid so they won't say everyone is OK. Dex 3 is what the tested and engineered for. I believe they did test Mobil one and that was good for use in T56 with the carbon blocker rings. My $02 is not to over analyze it and just use DEX 3 of any brand as the sticker on the tranny says.
Tremac does not test every brand of fluid so they won't say everyone is OK. Dex 3 is what the tested and engineered for. I believe they did test Mobil one and that was good for use in T56 with the carbon blocker rings. My $02 is not to over analyze it and just use DEX 3 of any brand as the sticker on the tranny says.
10-06-2016, 09:31 AM
#100
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I just received my Tick Performance built T56 and emailed them to see what trans fluid they recommend with their built transmissions and they told me Dextron 3 ATF. Gonna go with that or Mobil 1 ATF I believe as I stay around VA-FL and it doesn't get too cold either way. Just so everyone knows what they recommend for their built T56s.