PPE Thermal Bypass

[Hunter11]

Just wondering if anyone is running the PPE transmission thermal bypass to lower trans temps on the 6.4 ZF8. I installed a thermal bypass on my wifes GMC 5.3 trans and it lowered the temps by 25*. I emailed PPE to make sure it fits the ZF and they replied it does fit. Thanks for any feedback.

https://ppepower.com/products/ram-t...pass-valve-2019-2024-2500-3500-5-7l-6-4l-6-7l

 

[dieselscout80]

My truck’s transmission temperatures stay constant at 167 or 168 degrees even in the summer towing 10k, so I’m not sure it’s necessary.

I think it needs to get warm enough to keep moisture out of the transmission fluid.

Maybe if one was pulling full time and heavy it might be worth considering.

 

[jetrinka]

Yeah at least for my usage I haven't seen a need - I don't tow heavy but pulling our little 5k gross travel trailer up some decent mountain passes in the summer I've seen trans temp hit about 184. Not high enough to worry me.

What transmission temps have you seen?