What fluid do you run in your T56?

EmersonHart13

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I am going to be changing mine in the near future and everyone and their grandmother have a different opinion. Spec is Dex/Merc III and I believe (have read) Tremec also recommends Mobil 1 Synthetic ATF.

What do you use?

Thanks,

John
 

wolfe

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I have heard of a lot of people using the ATF and swear by it. For synthetic, I've always liked red line. I would talk to someone who rebuilds them and see what they recommend.
 

EmersonHart13

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People are all over, but ATF is the spec.

There is some argument between synthetic and regular as well.

Makes my head hurt.
 

6literEat'r

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gm atf dex 3 is the standard....i run the newer style dex 6 in my t56, have had no problems.
 

EmersonHart13

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I was thinking of going Mobil Dex/Merc VI. That's good feedback.

Thanks
 

Wrencher

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I build T56's.
Redline D4 is about the best thing you can put in them.
Holds up well & provides the proper friction level for the blocker rings.
Has a GL-4 protection level rating.

Many that road race & auto x also run the same thing.
 

EmersonHart13

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After reading the description it definitely sounds like what I am looking for. The trans has not been liking the cold weather at all. Will it help smooth out the operation as well?
 

Wrencher

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After reading the description it definitely sounds like what I am looking for. The trans has not been liking the cold weather at all. Will it help smooth out the operation as well?
It actually does help cold.
But is your clutch hydraulics holding up too?
That is just as if not more important than the fluid choice.

I( only ask because seen many have a slightly different pedal cold & cause notchy shifting.
 

EmersonHart13

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First manual and the only one I have ever driven so I don't really know. I am also due to do a clutch fluid swap too. From what I have read I am overdue on that, most recommendations are to change that quite regularly. Is that what you are asking about?

I have read some less than glorious reviews about Royal Purple, but that doesn't mean the fluid was actually at fault for their problems.
 

Smokinhot

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I ran RP,it seems to help quite a bit with operations and knock down temps. My leg didn't seem so hot after awhile. F-body owners know what's up
 

EmersonHart13

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Well then RL, RP, and then Mobil are my top 3 then.
 

Wrencher

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First manual and the only one I have ever driven so I don't really know. I am also due to do a clutch fluid swap too. From what I have read I am overdue on that, most recommendations are to change that quite regularly. Is that what you are asking about?
Clutch fluid flush is a maintenance on these cars.
I always flush mine right when it seems to start getting dirty.

But you'll notice some cars more then others they seem to get a slight mushy pedal cold. As the car warms up it improves along with the shifting.
I always pay attention to the free play in the pedal.
Hydraulic clutches are a pain sometimes.

Hydraulics are very important for the longevity on the T56 in a F/Y car.
 

EmersonHart13

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Yeah, I have read about changing the clutch fluid whenever you do the oil, at the least.

The clutch and trans are so much better warmed up.

The more I read about the T56 the more I shake my head. I really enjoy the box or rocks noise that everyone talks about. I hear the StangShifterGaskets.com gasket really helps keep that noise down.
 

EmersonHart13

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I did the clutch fluid today and it was terrible. I am glad I ran across the thread about changing that. I will be sure to add that to my regular routine.

I ordered 5 quarts of the Redline D4 from Amazon, which arrives Wednesday, and I am planning to do the fluid Saturday if my new shifter gasket comes by then.

Thanks for all the help.
 

EmersonHart13

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So Wrencher if you had a GTO would you ignore GM? I think you would...
 

Wrencher

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The GTO's do call for 4.6 q. The F cars call for 4.
The GTO triple coned synchronizers on all forward gears is a best version that has more in common with a T 6060 than a T56. But it is a T56, with a higher recommended fill capacity.
I dont know why I had it in my mind yours was an F car.
 

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