ATF extreme heat info??

[KenO]

Has anybody seen any info anywhere on ATF fluids under extreme temps (>200*F)?? Having a little debate on another forum about road race use in high torque applications (> 500 ft./tq) as a manual transmission lube.

 

[Jim Allen]

There is a fair bit on the web, usually in the form of the ubiquitous time at temperature charts. That's what it usually comes down to with temps up to about 250F. The oil oxidizes faster at higher temps. If the oil temp is higher than that consistently, you need to look at cooling methods... simple as that. You didn't offer much contextual info in your question, but , generically, determining operating temps are step one... meaning a temp gauge.

 

[KenO]

Originally Posted By: Jim Allen

There is a fair bit on the web, usually in the form of the ubiquitous time at temperature charts. That's what it usually comes down to with temps up to about 250F. The oil oxidizes faster at higher temps. If the oil temp is higher than that consistently, you need to look at cooling methods... simple as that. You didn't offer much contextual info in your question, but , generically, determining operating temps are step one... meaning a temp gauge.

Oh, I know. I guess I'm asking, is there any proof that an ATF is adequite at high temps and high torque loads, as compared to a proper manual trans lube like Redline MTL or Amsoil MTF, or other trans lubes?? What happens to the viscosity of ATF at high temps, as well as the additive packs and friction modifiers, as compared to the same temps with MTL or MTF, especially with the kind of load we're talking about (road race application, extreme torque demands, etc.)??

 

[KenO]

Originally Posted By: Jim Allen

There is a fair bit on the web, usually in the form of the ubiquitous time at temperature charts. That's what it usually comes down to with temps up to about 250F. The oil oxidizes faster at higher temps. If the oil temp is higher than that consistently, you need to look at cooling methods... simple as that. You didn't offer much contextual info in your question, but , generically, determining operating temps are step one... meaning a temp gauge.

Oh, I know. I guess I'm asking, is there any proof that an ATF is adequite at high temps and high torque loads, as compared to a proper manual trans lube like Redline MTL or Amsoil MTF, or other trans lubes?? What happens to the viscosity of ATF at high temps, as well as the additive packs and friction modifiers, as compared to the same temps with MTL or MTF, especially with the kind of load we're talking about (road race application, extreme torque demands, etc.)??

 

[dparm]

I'd give Red Line's tech line a call. Ask them about ATF in racing situations.

 

[deeter16317]

They use ATF+4 in the Dodge G56 behind the (stock) 610 TQ Cummins, and guys are running around with 25k+ pound GVWs...not to mention the guys with programmers, etc. that are pushing bigger TQ numbers. In a manual trans, I'd be looking for a lighter MTF like Royal Purple SynchroMax or at the very least, a synthetic ATF.

 

[mechtech2]

http://performanceunlimited.com/documents/ Oil temp chart and more!