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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: kodalee on April 14, 2014, 08:24:39 pm

Title: what type of fluid
Post by: kodalee on April 14, 2014, 08:24:39 pm

I just had my turbo 350 rebuilt with Kevlar clutches and a competition shift kit. It will be used for daily driving/ off road. will a house brand of fluid work or should i run something like Lucas or Valvoline

Title: Re: what type of fluid
Post by: BADAZ chevy guy on April 14, 2014, 08:45:58 pm

Run the good stuff!

Title: Re: what type of fluid
Post by: rich weyand on April 14, 2014, 09:24:06 pm

Run synthetic ATF.  It's chemical properties are such that it will heat up much less, lowering transmission temps considerably and extending transmission life.  Shifts nicer, too.

Title: Re: what type of fluid
Post by: bd on April 14, 2014, 09:45:35 pm

Allison Transynd (http://www.madjackdiesel.com/allison-1000-transmission/allison-fluids/transynd-transmission-fluid.html) full synthetic

TCI Max Shift (http://www.summitracing.com/parts/tci-950640/overview/) mineral

Both of these products provide excellent, cost effective service in GM automatics. 

Heat kills automatic transmissions rather quickly.  Ensure longer life from your new HP transmission by installing a good supplemental cooler to augment the factory wet cooler.