GM Sinchromesh and T-5

[1991GT]

Can GM Sinchromesh be used in a T-5? If so is it the best lubricant or is there a better one availible?

[jimberg]

Tremecs use GM Synchromesh. You just need to use ATF (Mercon-Dextron II / III ) or any high performance synthetic equivalent (Royal Purple, Red Line)

[Mr 5 0]

Yes, you can use GM Synchromesh tranny fluid in a T-5 but any synthetic ATF fluid will do the job quite well.

[1991GT]

My car has 130,000 miles on it and sometimes is real hard to get into first gear. Shifting isn't isn't the smoothest around either and I know the fluid has never been changed. My friend has an 87 Fiero and had a very similar issue with his transmission but fixed it when he added the Sinchromesh. I've heard a lot of good things about Red Line's products, you guys think I'd be better off with the Red Line rather than the Sinchromesh?

[jimberg]

This is taken directly from the TTC web site.

What type of lube is recommended for my TREMEC transmission?

The following types of lube are recommended:
TR-3550/TKO - GM Synchromesh or Dextron III
TR-3650/T-45/T-5 - Dextron III
T-56 (Ford and GM) - Dextron III
T-56 (Viper only) - Castrol Syntorque

GM Synchromesh is too heavy of an oil to use in a T5. I don't think you would benefit at all from using it, so, yes, looking at Red Line would be a better alternative.

[Mr 5 0]

I've known a few people who used the GM Synchromesh fluid in a T-5 without any negative results so I don't believe it would harm an already worn T-5 but as I stated in my first post, any synthetic Mercon fluid would be better.

Red Line is very high quality; you can't go wrong with any of their products.

[jrgoffin]

You can't go wrong with Mobil 1 sythetic ATF in your T-5! I use Mobil 1 prodcuts everywhere and like the fact that they are all available at local shops.