Eaton Autoshift Gen 3 Programming Question

Great question. I have never been able to find that information either. Very illusive for sure. They should all skip gears if you are accelerating fast enough with the engine using low torque. For sure do not use any heavy haul calibrations.

 

Can you post your current settings and or a SAR from service ranger?

 

Try the acert tune. One of the best shifting ones they have. If you have a single turbo it may shift too low of rpm and fall below the turbo. Should skip shift good too.

 

Dont matter. Give it a try for a couple runs. Only issue is it might shift too low of rpm. We have a couple customers with it on a deleted isx

 

You might also consider changing your default start gear to 3rd and maximum start gear to 6th. This will give a better feel when empty on takeoff. This will expand your ability to select a higher gear on takeoff as well. And if your super heavy you can still go lower if needed. Think about what gear you would take off in if it were a manual?

 

I use the 2000rpm heavy haul calibration in all single turbo cats I work on.

I find driving from 1300-1550rpm with our gross weights generates too much heat with high pyros from lugging falling below the turbo. with the BW 0000 650hp non wastegated turbos its even worse again.
I find the 2000rpm heavy hall drives them from 1500-1800rpm.

im by no means an experienced truck driver but I advise my C15 powered clients to drive in that range. the ones that do rarely do turbos or manifolds. I personally split down 1/2 gear in 20/22 series 18 speeds with anything from 4.11-4.56 diffs at 1550rpm on an uphill pull. it grabs the gear and youre back on the party peddle at 1750-1800rpm in the sweet spot of the single turbo.

I even use it in the ACERTs. not the most ideal but in my opinion its the best option in there