What is the difference between AFT3 and AFT4 transmission fluid?

Answer 1

I think you mean ATF, (Automatic Transmission Fluid) Dexron is not a universal fluid. Chrysler four-speed automatics only use ATF+3 (ATF+4 for newer vehicles), regardless of what the dipstick or owner's manual says. Chrysler ATF+3 fluid is no longer the only fluid to use in a late model transmission. Chrysler TSB# 21-006-01 notes that all current vehicles only use ATF+4 type 9602, part 05013457AA (for quart bottles). The advantages of ATF+4 over ATF+3 include: Better anti-wear properties, Improved rust/corrosion prevention, Controls oxidation -Eliminates deposits, Controls friction, Anti-foaming, Superior low temperature operation: From what I have read ATF+3 is not synthetic but ATF+4 is synthetic. Use what your owners manual states or ask you local chrysler dealer, but do not under any circumstance use Dexron or a universal fluid.

Answer 2

AFT3 and AFT4 are specific types of automatic transmission fluids that meet different performance specifications set by the manufacturer. AFT4 typically has a higher viscosity and better lubricating properties compared to AFT3 to meet the requirements of newer transmission systems. It is important to use the correct type of transmission fluid as recommended by the vehicle manufacturer to ensure proper operation and longevity of the transmission.