Originally Posted By: MolaKule
The grapevine info I got was that they increased the phosphorous AW component when they changed the labeling.
Since there are better application specific MTL fluids than DexronIII for MTLs, I don't know why anyone would use it in any MTL.
From Tremec's website FAQ:
Q: What type of fluid does TREMEC recommended?
A: For all ... aftermarket models we recommend Dexron III ATF.
Q: Why use automatic transmission fluid in a manual gearbox?
A: Automatic transmission fluids provide the necessary protection and lubrication, while still allowing the synchronizer to function at its best.
Q: Why not use a synthetic fluid?
A: ... For peace of mind, remember that TREMEC conducts all of its OEM validation testing using conventional fluids without issue.
I trimmed out some extraneous references to transmissions that actually take MTL (one model number only) and a negative piece about synthetic fluids. Basically, if it's the cheapest Dex III ATF, then it's welcome in your Tremec. The thing that amazes me is that they are so adamant on ATF, when there are real GL-4 oils with better viscosimetrics and better anti-wear available.
Is it just a relentless commitment to the fluids that Borg-Warner chose back when these gearboxes were developed? Who knows! If I could find a GL4 that had the right friction characteristics, I'd give it a try. I've read that Ford's DCT fluid works in these gearboxes, but at $30 a quart, I'm not hot to buy five quarts just to give it a try (my TR6060 takes 4.2 quarts).
The grapevine info I got was that they increased the phosphorous AW component when they changed the labeling.
Since there are better application specific MTL fluids than DexronIII for MTLs, I don't know why anyone would use it in any MTL.
From Tremec's website FAQ:
Q: What type of fluid does TREMEC recommended?
A: For all ... aftermarket models we recommend Dexron III ATF.
Q: Why use automatic transmission fluid in a manual gearbox?
A: Automatic transmission fluids provide the necessary protection and lubrication, while still allowing the synchronizer to function at its best.
Q: Why not use a synthetic fluid?
A: ... For peace of mind, remember that TREMEC conducts all of its OEM validation testing using conventional fluids without issue.
I trimmed out some extraneous references to transmissions that actually take MTL (one model number only) and a negative piece about synthetic fluids. Basically, if it's the cheapest Dex III ATF, then it's welcome in your Tremec. The thing that amazes me is that they are so adamant on ATF, when there are real GL-4 oils with better viscosimetrics and better anti-wear available.
Is it just a relentless commitment to the fluids that Borg-Warner chose back when these gearboxes were developed? Who knows! If I could find a GL4 that had the right friction characteristics, I'd give it a try. I've read that Ford's DCT fluid works in these gearboxes, but at $30 a quart, I'm not hot to buy five quarts just to give it a try (my TR6060 takes 4.2 quarts).