Tampa 928s

Update on tyranny:
I found a bad vacuum line a 4 inch size above the TT it was hidden very well; it had a hole in it. I took it for a warm up drive and a found good bit of difference.
I had to add almost 2-Quarts of ATF after adding a can of Tran-x. I drained some fluid first but about just a quart. I placed the car in neutral after a warm up drive, probably only 1.5 of Atf went in the rest spilled down my arm. I will know today how well it drives. That means I was down 2 Quarts and had a vacuum leak. I still need to adjust the Cables the TB is real loose but am waiting on new boots. They wont budge due to age and can't get at the adjustments.

Tampa 928s

I think I screwed up last night, it was late and I was not paying attention and picked up Mercon V Atf and instead of Mercon Dextron. I added a little less than 2 Quarts and a 16 Ox can of Trans-X. should I drain the fluid or not worry about it?
I know better than to rush these things but do anyways!

Tampa 928s

Anyone so I can sleep tonight !

GregBBRD

Doubt anyone knows what happens when different kinds of fluid are mixed...I certainly do not...and I fix these things. If there is any doubt...drain and refill...that's what we would do here.

Tampa 928s

Running out tonight to get some fluid, I have a leaking Transmission hose to replace and its off now, about to get dirty again. I think thats the best thing to do also!

WallyP

From Valvoline's specs:
Mercon V
Recommended for use in passenger and commercial vehicles requiring Ford’s MERCON®V and MERCON®, GM DEXRON®-IIE, III, and approved for H Specification


From Chevron's specs:
DEXRON-III. This is a specification for General Motors vehicles, but many foreign manufactures specify a DEXRON approved ATF as well. DEXRON-III can be used in transmissions that call for DEXRON-IIE or DEXRON-II.

MERCON. Most late model Ford vehicles specify a MERCON ATF. Most ATF's that meet DEXRON-III also meet the MERCON requirements.

MERCON V. Beginning in 1997, Ford began building transmissions for some of their large cars, trucks and vans that require a MERCON V fluid. MERCON V generally can not be used in transmissions that call for a MERCON ATF.

CHEVRON'S AUTOMATIC TRANSMISSION FLUIDS. CHEVRON SUPREME AUTOMATIC TRANSMISSION FLUID IS DEXRON-III AND MERCON approved and is formulated with special base oil for Supreme protection from heat, oxidation and wear.


Pennzoil specs:
PENNZOIL MULTI-VEHICLE ATF is a special blend of high quality synthetic and mineral base stocks with an advanced additive system for automatic and powershift transmissions. It is fully qualified as a DEXRON-III (H), MERCON, MERCON V and Allison C-4 fluid.

Quaker State:
QUAKER STATE MULTI-VEHICLE ATF provides excellent wear protection for all passenger cars and light trucks requiring the use of a Type A or Type A Suffix A, GM DEXRON, GM DEXRON-II, GM DEXRON-IIE, GM DEXRON-III (H), Ford MERCON or MERCONV automatic transmission fluids.

Lots of confusion...

Jim bailey - 928 International

Dexron and Mercon were names made up and licensed by the AUTO makers. Oil companies can only use those NAMES if they PAY. The confusion is deliberate to benefit the auto maker and oil company license agreement. The trend toward one size fits all indicates that there is probably little difference in MOST. That said the stuff is cheap and best to run what was specified.

Bill Ball

MOST of the current ATFs that are Mercon V certified are multipupose and include the Dexron III spec. Some, like Valvoline's, do not. I can't vouch for the safety of using Mercon V in place of Dexron III in our cars. It's possible it might even work better. It's been found to provide crisper shifting in OTHER transmissions, and, vice versa, when Dexron III was installed or added to Mercon V in trannies that called for Mercon V, the shifting was smoother and problems with shuddering torque converters were eliminated. The newer formulations have lower viscosity and different friction modifiers. Dexron VI has lower viscosity at operating temperatures than earlier Dexron formulations, and this might be beneficial, for all I know. I was hoping Steve Cattaneo would pop in and comment.