Friggin Frusterating Fluids September 19, 2008, 06:14:22 PM Hello all, Long live liquids I always thought that the AOD tranny in 87 and 88 used the Ford Type F transmission fluid. Am I right or wrong? The Haynes DIY indicates for C3, AOD, A4LD trannys for 83-87 to use Dexron II, while the 88 C3, AOD, A4LD tranny's use Mercon. Bottom line question... what type of tranny fluid should I use in my stock 1988 Cougar XR7, AOD (20 yrs old, and still shifting great)? Type F (part no. XT-1-QF), Dexron II (part no. XT-2-QDX) or Mercon (part no. AT-2-QDX), or even something else? Quote Selected
Friggin Frusterating Fluids Reply #1 – September 19, 2008, 08:14:07 PM mercon/dexron III Quote Selected
Friggin Frusterating Fluids Reply #2 – September 19, 2008, 10:57:30 PM What is the difference between Dexron III and II? Quote Selected
Friggin Frusterating Fluids Reply #3 – September 19, 2008, 11:27:50 PM ISorry, I Thought it was a math question Quote Selected
Friggin Frusterating Fluids Reply #4 – September 19, 2008, 11:56:53 PM I've used nothing but "F" in my SC AOD since I installed it back in '99... It's lived through close to 700 drag strip passes... I switched to "F" in '93 Grand Marquis AODE in '98 when it started slipping on the 1-2 shift at 33K mi... With the help of a B&M electronic shift improver, it lasted till last year with 131K on the clock... Failure then was the front pump to housing gasket... Quote Selected
Friggin Frusterating Fluids Reply #5 – September 20, 2008, 12:17:30 AM Im no expert, but Type F, was sure as hell not called for in these AOD's.I will use Mercon IV or whatever it is, when I change mine. Maybe its Mercon V, I dunno. Quote Selected
Friggin Frusterating Fluids Reply #6 – September 20, 2008, 07:42:34 AM Quote from: mcb82gt;236771Im no expert, but Type F, was sure as hell not called for in these AOD's.Obviously..."F" isn't as greasy as the Dextron/Mercon fluids and gives a firmer shift(most of the GM racers use it in their trans as well) ... Doesn't have the durability, so in a street application it should be changed at about 20K mi...Quote from: mcb82gt;236771I will use Mercon IV or whatever it is, when I change mine. Maybe its Mercon V, I dunno.You should not use Mercron V in the older transmissions, as there is a said comparability issue with some of the seals... Whether it's a real problem, I honestly don't know... Quote Selected
Friggin Frusterating Fluids Reply #7 – September 20, 2008, 01:01:27 PM So, bottom line, I should use Dexron III?What's the difference between Dexron II and III? The Haynes manual calls for DexII, not III. Quote Selected
Friggin Frusterating Fluids Reply #8 – September 20, 2008, 05:16:47 PM personally, I've only used what was stamped on the dipstick for my cougar.but I do remember using type F in my 88 E-250 with aod.never had any problems with it. Quote Selected
Friggin Frusterating Fluids Reply #9 – September 20, 2008, 09:17:05 PM Quote from: cougarXLS;236790So, bottom line, I should use Dexron III?What's the difference between Dexron II and III? The Haynes manual calls for DexII, not III.Dexron III supercedes II...simplest answer. Have fun. Quote Selected
Friggin Frusterating Fluids Reply #10 – September 21, 2008, 01:07:52 PM Okay.Anyway, I've done some pretty silly, stupid things in my life. But this one's a topper: thanks daminc. I merely gazed at the tranny dipstick: Mercon. LOL, all these years thinking it was Type F.So my next question, for curiosity's sake, is what's the difference between Dexron and Mercon? Quote Selected
Friggin Frusterating Fluids Reply #11 – September 21, 2008, 03:04:14 PM Quote from: cougarXLS;236859what's the difference between Dexron and Mercon?GM markets one Ford the other... AFIK no difference... Quote Selected
Friggin Frusterating Fluids Reply #12 – September 21, 2008, 05:14:27 PM So I should just walk in to my local parts store (in my case, NAPA) and ask for Mercon Transmission Fluid for an 88 Cougar and they'll hand me the *whatever equivalent* for Mercon?This is obviously a new area for me, as I've been using Type F forever. LOL, I wonder if that's why I've had so many tranny problems over the years............. Quote Selected
Friggin Frusterating Fluids Reply #13 – September 21, 2008, 05:15:44 PM , after reviewing this post: I have ALOT to learn. LOL.............. duh. Read the dipstick stupid.Lol, just thought I'd beat anyone to the punch. Quote Selected
Friggin Frusterating Fluids Reply #14 – September 21, 2008, 07:21:23 PM Read the Mercon III bottle, it should tell what all it replaces. Quote Selected
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