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LMM/Allison Cooler?

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Hauled another load! Picked up this nice grass hay near Williams Fork Reservoir then hauled it over Berthoud Pass and down the hill home. 7 ton this time, trailer is at 5,500. She went up over the pass no problem but coming down was a bit sketch! If i didnt have the turbo brake in my tow tune i would have been screwed. Tranny did great never broke 195. Truck and trailer might need new brakes!

Sent from my SM-G900P using Tapatalk
 
Sounds like you need to verify proper trailer brake operation or turn up the gain on the trailer brakes. We use one setting unloaded and another loaded.
 
When you go to manual mode, it disables grade braking so you have to manually kick it down to get it up in the RPM's. 4800 is about as high as the TCM will take it, but 4900 won't hurt it.
 
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