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#503644 - 11/27/03 10:07 AM GM Oil Part # 12346190
kmook Offline

Registered: 11/26/03
Posts: 2
Loc: West Palm Beach, FL.
I have a 96 Trans Am and the T-56 manual tranny went on it. So in doing a rebuild on it i ordered upgraded parts for it from Donato Engineering. And after i ordered the parts he said to go to a GM dealer and use part #12346190 which is a new oil that is really good...

Anyone know what this is, or why its any better than normal tranny fluid? All i know is it was $20 a quart [Eek!]

[ November 28, 2003, 02:09 AM: Message edited by: kmook ]

#503645 - 11/27/03 11:11 AM Re: GM Oil Part # 12346190
Ferb Offline

Registered: 10/20/02
Posts: 263
Loc: San Diego, CA
12346190 is the Castrol Syntorq LT. Doing a quicky search on here for "Syntorq", it seems the best alternative is a 50/50 mix of Redline MT-90 and MTL.

For background, the 6190 is used in the Viper, but not in the T-56 for the 'vette. in the Corvette it was just normal Syncromesh fluid.

pricey buggers those GM factory lubes are.


#503646 - 11/27/03 05:36 PM Re: GM Oil Part # 12346190
kmook Offline

Registered: 11/26/03
Posts: 2
Loc: West Palm Beach, FL.
Thanks [Smile]

I found this which was interesting-

#503647 - 11/28/03 01:33 AM Re: GM Oil Part # 12346190
Ferb Offline

Registered: 10/20/02
Posts: 263
Loc: San Diego, CA
Hm. Hm hm hm. Synthetic lube eats paper. Never heard of anything like that. Trying to run that scenario in my head, i can't find any reason that it WOULD.

Maybe with a full ester fluid that is polarized...

Anyone reading this that can give a better reason? If paper is dissolved in synthetic ATF, then many tranny filters should be completely gone by now.


#503648 - 11/28/03 05:33 PM Re: GM Oil Part # 12346190
TooSlick Offline

Registered: 08/02/02
Posts: 5785
Loc: Dixie
Amsoil recommends either of their 75w-90, synthetic gear lubes for this application. The Castrol Syntorq is a synthetic gear lube will very good low temp properties ...

I'd run the Amsoil S2000, 75w-90 (TGR) - I think it retails for about $9.25/qt if I remember correctly.

Dixie Synthetics

#503649 - 12/01/03 06:14 AM Re: GM Oil Part # 12346190
Rat407 Offline

Registered: 12/13/02
Posts: 1279
Loc: North Carolina
Close TooSlick, $9.20/qt [Big Grin]