Cummins ISL 9 with Alison 4000 6 speed.
2014 Providence 42p pulling a toad. Combined total weight about 42000. Traveling on 70 through Utah. This rig really seams doggy. With cruse set on 65 it will pull down to 40 on evan the moderate gra...
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I'm a little surprised you have a 4000 tranny as most ISL's came with the 3000. Not downshifting between 65 and 40 is a programming problem... probably because it's programmed for 500 HP.
My combined weight is over 42K and I can climb most mountain passes at 40 in 4th without manually downshifting. On a long climb I will manually shift so if I have to let up on the throttle for traffic it does not upshift. I use the Eco Mode for rolling hills but not for mountains.
My combined weight is over 42K and I can climb most mountain passes at 40 in 4th without manually downshifting. On a long climb I will manually shift so if I have to let up on the throttle for traffic it does not upshift. I use the Eco Mode for rolling hills but not for mountains.
