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#519307 - 11/11/05 02:05 AM Best Synthetic Automatic Transmission fluid?
Rob Taggs Offline


Registered: 09/08/04
Posts: 807
Loc: Lansing , Kansas
Any opinions on the best one? Changing the Dexron III in wife's Aztec. It takes 7.4 quarts total. Have access to Mobil 1, and Valvoline. Will be shopping around town for some.

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#519308 - 11/11/05 03:31 AM Re: Best Synthetic Automatic Transmission fluid?
Dad2leia Offline


Registered: 09/06/05
Posts: 1202
Loc: Glenshaw, PA
I would seriously give MolaKule's SF AutoGlide a look see Rob. I have it in my Honda right now, and it shifts better than it did with that darn Honda ATF spec Z-1 factory fill did.

His formulations are pretty darn remarkable.

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#519309 - 11/11/05 03:44 AM Re: Best Synthetic Automatic Transmission fluid?
Pablo Offline


Registered: 10/28/02
Posts: 47100
Loc: Duvall WA - Pacific NW USA
Amsoil ATF

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#519310 - 11/11/05 04:02 AM Re: Best Synthetic Automatic Transmission fluid?
unDummy Offline


Registered: 02/01/03
Posts: 8756
Loc: RI
Try the Castrol Transynd or Amsoil TorqueDrive.

Since its just Dexron III, Mobil1 ATF is what I would use. I'm also thinking that my next case of DexronIII will be Royal Purple.

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#519311 - 11/11/05 04:40 AM Re: Best Synthetic Automatic Transmission fluid?
Not the Autorx Frank Offline


Registered: 03/02/03
Posts: 1096
Loc: So Cal
I am currently using RL D4 but I have to nod to Amsoil ATF also. I went who knows how long with a plugged tranny cooler without burning the tranny down. Bullet proof ATF if you ask me. I went 50k an d saved a tranny on that oci.

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#519312 - 11/11/05 04:56 AM Re: Best Synthetic Automatic Transmission fluid?
LargeCarMan Offline


Registered: 10/10/05
Posts: 632
Loc: Idaho
I have over 300,000 miles on my original C-6 Ford transmission with 5 services of Amsoil ATF. It is mated to a 6.9 diesel and transfer case that also run Amsoil. I was an Amsoil nut for many years. Ran the 30wt Diesel oil, single bypass filter, Universal transmission oil, 85-140 front and rear, and grease and fuel additive. This is when I was a single trucker...now married with kids and the truck sits and just goes to the dump and pick up hay....Truck is just wonderful and the 21,000 dollars back then for the truck is still serving me well....84 F-250 Supercab Diesel 4X4. Amsoil is the transmission oil to get if you can afford the cost...in the long run if you keep a truck or car till it dies synthetics pay off.

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#519313 - 11/11/05 05:32 AM Re: Best Synthetic Automatic Transmission fluid?
johnand Offline


Registered: 03/21/05
Posts: 36
Loc: Camas, WA
Yep, AMSOIL ATF is **** good stuff. Been running it in my Jeep Grand Cherokee since it was new in 1998. This is with heavy towing of a boat, and lot's of offroad abuse. The AMSOIL has held up very well, and has keep my tranny happy, which is rare for DCX tranny's.

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#519314 - 11/11/05 07:18 AM Re: Best Synthetic Automatic Transmission fluid?
ARB1977 Offline


Registered: 06/12/05
Posts: 4799
Loc: North Texas
Redline D4 in my toyota tranny that seems to treat her very well. I change my fluid every year about 4-5 qrts worth. I could keep it in longer but clean fluid means happy tranny.

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#519315 - 11/13/05 10:26 AM Re: Best Synthetic Automatic Transmission fluid?
olympic Offline


Registered: 05/23/04
Posts: 694
Loc: Saskatchewan, Canada
Another vote for Amsoil ATF here. I have an 01 Montana creeping up on 300,000 miles with the original tranny. Hoping to get 370k+ before trading her in.

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#519316 - 11/13/05 05:25 PM Re: Best Synthetic Automatic Transmission fluid?
salesrep Offline


Registered: 08/22/03
Posts: 3391
Loc: lllinois

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#519317 - 11/14/05 04:02 AM Re: Best Synthetic Automatic Transmission fluid?
IslaVistaMan Offline


Registered: 05/25/05
Posts: 328
Loc: San Diego, CA
Taggs, Amsoil's Universal ATF works well in your power steering system, too -- provided it calls for Dexron for topping up.

I've used it for more than a year now after a complete flush, and the steering has never felt better. Way better than when the car was new, in fact.

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#519318 - 11/18/05 06:11 PM Re: Best Synthetic Automatic Transmission fluid?
Steelhead Offline


Registered: 07/15/05
Posts: 876
Loc: Washington
Mobil 1 ATF, avail across the country, full real synthetic tech, proven by millions of miles of use, comes on sale, reasonable price.
do a complete flush/change out cooler line.

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#519319 - 11/20/05 11:16 PM Re: Best Synthetic Automatic Transmission fluid?
MolaKule Offline


Registered: 06/05/02
Posts: 17773
Loc: Iowegia - USA
quote:
Another vote for Amsoil ATF here. I have an 01 Montana creeping up on 300,000 miles with the original tranny. Hoping to get 370k+ before trading her in.
What was your oil change intervals?

I believe that short(er) oil change intervals for AT's have a major effect on longevity.

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#519320 - 11/20/05 11:26 PM Re: Best Synthetic Automatic Transmission fluid?
Lance Offline


Registered: 07/30/02
Posts: 145
Loc: Austin, TX
My experience is with a healthy 1997 Toyota Camry, which sports over 151K miles, and the original tranny on AMSOIL universal ATF.

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#519321 - 11/20/05 11:54 PM Re: Best Synthetic Automatic Transmission fluid?
Gary Allan Offline


Registered: 09/28/02
Posts: 39806
Loc: Pottstown, PA
I believe that short(er) oil change intervals for AT's have a major effect on longevity.


Mola, can't we, through auxillary cooling and filtration, extend ATF life pretty far out there? I mean to the point where the fluid isn't any major part of the equation ..to where it would be nothing compared to normal "shedding" that's an inherent part of the operation of an automatic?

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