Want this question answered?
Dexron III/Mercon automotive transmission fluid (ATF) is generally recommended as a replacement fluid for automatic transmissions meeting original equipment manufacturers (O.E.M.) performance requirements for current General Motors, Ford, other domestic and imported passenger cars, vans and light trucks where DEXRON II, DEXRON II-E, DEXRON III, AND Ford/MERCON fluids are specified.Dexron VI is a partial synthetic which properties exceed dexron III by 100% in every area. Dexron VI can not be interchanged or repalced with DEXRON II, DEXRON II-E, DEXRON III, DEXRON-III/MERCON.
Mercon/Dexron or Mercon VI.
Dexron-III/Mercon (D/M) does NOT meet the Mercon V (M-V) or Dexron-VI (D-VI) rating and should NEVER be used in a transmission that requires M-V or D-VI. However, M-V and D-VI both exceed the D/M spec and can be used in a transmission that calls for D/M transmission fluid. Despite this, there is really no point in using M-V or D-VI in a transmission designed to use D/M because those transmissions do not get any added benefit from them despite M-V and D-VI being roughly double to triple the price of conventional D/M.
There is no such oil as Dexron 4, there is Dexron 6 (VI).
No you need to use Dexron VI
MERCON V is a transmission fluid for Fords and DEXRON-VI is a fluid made for GMs. Mercon and Dexron are NOT, nor have they ever been, the same thing. People got the idea that they were because traditional ATF meets the specs of both. It doesn't mean that they have the same specs. Mercon V and Dexron VI are non-interchangeable. Always read the label of any ATF you plan to use. GM, Ford and Chrysler all use different fluids so make sure that what you choose is correct!
Dexron VI ATF or Dexron/Mercon Domestic Multi-Vehicle ATF.
Dexron III is itself an hydraulic fluid. The issue is, not all hydraulic fluids are equal in quality. General Motors recommends replacing the discontinued Dexron III with Dexron VI
Dexron III can be used and you can also use the newest Dexron VI which is backward compatible and provides more protection than Dexron III.
4 bottles (quarts) of fluid. I have a 1999 XLS, & I recently changed transmission fluid. Transmission was drained with removing coolent connection etc. (complete removal). I Dexron VI can be used, instead of the original Dexron III (original fluid - again Dexron III was a cutting edge when 98 Avalon was released!). Dexron VI has many advanges over Dexron III. Consult a knowledgeable mechanic, & use the proper Dexron VI for your vehicle.
Dexron VI which supercedes Dexron III
Always use the exact transmission fluid specified by your vehicle manufacturer. Some transmission fluids are backwards compatible and some are not. Use of the incorrect transmission fluid can damage or destroy your transmission.Previous versions of Dexron ( II, III) transmission fluid are not acceptable substitutes for Dexron VI.