Which fluid for TH350?

Mountaineer

Veteran Member
Mar 6, 1999
2,095
Where Mountaineers are free
Purchased a TH350 for a project, its been sitting empty since a rebuild some 10-12 years ago. Kinda scouted around (Advance, Auto Zone, Walmart) for what I believe went in these trannys some years ago, Dexron III I believe, and nothing positive, just a counter guy who says "that stuff will work". What WILL work, thats on the shelves today?
 

CorkyE

Veteran Member
Lifetime Gold Member
Nov 4, 2004
11,931
Ringgold, GA
Red...

That's what my transmission buddy tells me. Valvoline Dex/Merc III from WalMart is what I use. No need for the more expensive stuff.
 

COPO

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Lifetime Gold Member
Sep 15, 1999
22,300
Ontario, Canada
34BD10A1-CFD1-4256-A0DB-8980110A9185.jpeg
 

ChevyReb

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Feb 4, 2003
4,581
SC
I used what COPO showed in his pic above, or the latest iteration of it.

FWIW When I asked my transmission guy what fluid to use in it he said go to Dollar General and buy the cheapest fluid you can find that has Dexron III on it. At 1st I didn't think he was serious but he said that's what he uses in all of his rebuilds. He said it's the same spec paying more is a waste of $.
 

camaro71/holland

Veteran Member
Aug 27, 2003
1,668
The Netherlands
Periodic changes are far more important than the exact type of fluid (in old school transmissions) even for high build racing transmissions.

Can't go wrong with Dexron III as suggested earlier.
 




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