Lorin
Well-Known Member
- Joined
- Mar 28, 2010
- Messages
- 1,530
I really struggled with the ATF getting too hot in the Pyrenees two years ago. Using low range with the CDL off is a good way to keep the box cool on the steep switchback climbs.
It is worth noting that the ATF light comes on at 150C and turns off at 120C. At those temps your ATF is likely cooked. Changing it should be a top priority.
There are a couple of things you can do to improve the box cooling. Adding an aux ATF cooler makes a huge difference. My temps have reduced substantially since adding one. The recommendation with the A442F is the bigger the better. In terms of bang for your buck, this is the best single option - relatively cheap and easy to do.
Fitting an ATF temp gauge allows you to manage temps very effectively and stop getting anywhere near the light coming on.
The other is to fit a lock-up switch - this allows you to lock the TC in 2nd and 3rd thereby stopping the heat production. If you combine it with an uprated valve body you can also lock the TC in 1st. The upgraded valve body also improves cooling.
Wholesale autos in Oz recommend swapping out the ATF for fully synthetic Castrol Transmax Z. They suggest this is good for a 5C drop on its own and it is much more stable at high temps. Not cheap though.
It is worth noting that the ATF light comes on at 150C and turns off at 120C. At those temps your ATF is likely cooked. Changing it should be a top priority.
There are a couple of things you can do to improve the box cooling. Adding an aux ATF cooler makes a huge difference. My temps have reduced substantially since adding one. The recommendation with the A442F is the bigger the better. In terms of bang for your buck, this is the best single option - relatively cheap and easy to do.
Fitting an ATF temp gauge allows you to manage temps very effectively and stop getting anywhere near the light coming on.
The other is to fit a lock-up switch - this allows you to lock the TC in 2nd and 3rd thereby stopping the heat production. If you combine it with an uprated valve body you can also lock the TC in 1st. The upgraded valve body also improves cooling.
Wholesale autos in Oz recommend swapping out the ATF for fully synthetic Castrol Transmax Z. They suggest this is good for a 5C drop on its own and it is much more stable at high temps. Not cheap though.