I've been curious about the ability of thin ATF fluids protecting high hp fwd transmissions containing differentials all in one housing. I think I've gotten my answer by these two reports, particulary considering the mileage differences. All opinions welcomed. First sample is Redline MTL used 25,000 kms , including some road racing and 1/4 racing, hard driving conditions. Second sample is stock Chrysler ATF+4 with 4 oz of Mopar friction modifier, it was used about half the distance at 10,000 kms, no road racing, but a few 1/4 mile runs. here are the numbers:
Iron - 24 , 81
Aluminum - 5 , 16
Chrome - 0 , 1
Copper - 33 , 22
Lead - 15 , 25
Silicon- 20, 28
Zinc - 2184, 50
Visc cst.- 9.6 , 5.9
I was hoping the copper numbers on the Redline MTL would have been better, but I guess for over double the miles it is still better than the stock atf+4 fluid. Look how little zinc is in the stock fluid compared to Redline MTL, and viscosity is quite low too - very thin.
I've been swapping fluids trying to improve the shifting of this tranny as it hasn't been great. Still lots of copper coming off the snychros I think , with either fluid ?. I'm using Amsoil MTF right now and hope to have a comparison later down the road. I never liked the idea of using a thin ATF fluid in a manual tranny, I think this report confirms my suspicions. thin viscosity, low anti-wear additives, doesn't bode well in high hp applications.
I have particle count info for the atf+4 but I never got any on the Redline MTL sample so not able to compare that info. I can post it if anyone wants to see it though.
love to hear some opinions.
Joey
Iron - 24 , 81
Aluminum - 5 , 16
Chrome - 0 , 1
Copper - 33 , 22
Lead - 15 , 25
Silicon- 20, 28
Zinc - 2184, 50
Visc cst.- 9.6 , 5.9
I was hoping the copper numbers on the Redline MTL would have been better, but I guess for over double the miles it is still better than the stock atf+4 fluid. Look how little zinc is in the stock fluid compared to Redline MTL, and viscosity is quite low too - very thin.
I've been swapping fluids trying to improve the shifting of this tranny as it hasn't been great. Still lots of copper coming off the snychros I think , with either fluid ?. I'm using Amsoil MTF right now and hope to have a comparison later down the road. I never liked the idea of using a thin ATF fluid in a manual tranny, I think this report confirms my suspicions. thin viscosity, low anti-wear additives, doesn't bode well in high hp applications.
I have particle count info for the atf+4 but I never got any on the Redline MTL sample so not able to compare that info. I can post it if anyone wants to see it though.
love to hear some opinions.
Joey