What your really talking about here are the viscosity improvers and friction modifiers that are used in the base stock to create the finished transmission fluid. The ATF+4 spec calls out a very specific viscosity improver that Chrysler found would remain shear-stable for 100,000 miles (because people don't perform fluid/filter changes like they should). Dexron III starts to lose viscosity around 25,000 miles. Not a problem if you change your fluid and adjust your bands once per year. In real world terms the Dexron fluid that you put in is a little slicker (not as much grab) than the ATF+4 and is made from refined crude oil and it will lose viscosity quicker and won't tolerate as much heat (towing, hauling) as ATF +4. The problem that you describe in your first post is related to the govenor (sets and holds line pressure) in the transmission. The RH transmission used a hydraulic governor. Transmission has test ports on the side of the case to verify line pressure. I don't have them off the top of my head but if you have access to alldata or a factory manual they will be printed. That is the only way to accurately diagnosis the problem.

 

i dont think atf+3 is even sold anymore as atf+4 is a revised version of +3.

get that fluid out ASAP and replace with +4. if problem persists, replace the governor pressure sensor and solenoid, when mine went bad, i had the EXACT same symptoms

 

alright i had a problem my walmart doesn't sell +4 or neither my advance so what do i do

 

Say WHAT??? Advance has their own brand of ATF +4...... At least, the one here sells it.

 

lolz
My walmart has LOTS of ATF+4.
W00t.

 

mine says they don't have it but it ain't gonna matter anyway fuel pump when't out this morning so i'll be putting that thing in there

 

When i bought my ram the guy said he was and still running the atf+2.
is this bad? I Will be putting it atf+4