Quote:
Originally Posted by f250ben
This is helpful, and confirmation of what I just found. I did some research on the A340F transmission (which was in the 1st gen tacomas, 3rd gen 4runners, and the 03/04 4th gens. Most of the fluid checking instructions specified engine running.
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Same for every automatic transmission with dipstick I've ever seen including GM, Ford, Subaru, etc. Engine running at idle, transmission at operating temp, vehicle level.
Quote:
Originally Posted by f250ben
It looks like my trans was underfilled.
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Also, MaxLife fluid's hot viscosity is on the low end of the spectrum for your transmission. Yours calls for T-IV fluid which is thicker than WS...MaxLife claims to meet both specs. If you find you're not happy with the upshift or downshift behavior, consider exchanging for T-IV spec fluid.
The data below are gathered from manufacturer product data sheets, and show the significant difference in viscosity between MaxLife and Castrol's product which meets T-IV spec but not WS:
Product 40degC visc / 100degC visc / Viscosity Index
Valvoline MaxLife 28.82 / 5.91 / VI 156
Castrol TransMax Import Multi-Vehicle 36.6 / 8.0 / VI 200
