Tweet
as some of you know, I'm working on modifications to the auto gearbox (mainly) to enable lockup at speeds lower than normal, and in gears other than OD.
As you probably know, the auto gearbox is a big generator of heat, and that heat is dumped into the cooling system via the in rad ATF cooler. One way of mitigating this is to use an ATF cooler before the ATF goes into the rad. However, i've been doing a bit of research.
ATF works hardest when the torque converter is not locked and there is a lot of load on the engine - ie towing, climbing hills, offroad in low gears.
I had a little play at lunch time and found you can engage lockup in 2nd gear if you select 2nd gear on the box. This means whilst you're plodding up steep hills (or following another 2.4 up the hill before Strata Florida
) you should be able to reduce the amount of heat in the ATF considerably, just when you need to most - ie not much airflow over rad / ATF working hard.
This is applicable to 3.0s too - I've overheated my ATF a couple of times when heavily loaded and climbing steep hills.
Just something that might be worth considering if your truck works hard!
As you probably know, the auto gearbox is a big generator of heat, and that heat is dumped into the cooling system via the in rad ATF cooler. One way of mitigating this is to use an ATF cooler before the ATF goes into the rad. However, i've been doing a bit of research.
ATF works hardest when the torque converter is not locked and there is a lot of load on the engine - ie towing, climbing hills, offroad in low gears.
I had a little play at lunch time and found you can engage lockup in 2nd gear if you select 2nd gear on the box. This means whilst you're plodding up steep hills (or following another 2.4 up the hill before Strata Florida
) you should be able to reduce the amount of heat in the ATF considerably, just when you need to most - ie not much airflow over rad / ATF working hard.This is applicable to 3.0s too - I've overheated my ATF a couple of times when heavily loaded and climbing steep hills.
Just something that might be worth considering if your truck works hard!
Comment