lonegunman
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Thanks lonegunman. After putting a few more miles on it, the transmission as started shifting a bit more regular, but still shifts slightly over 2,500 RPM. Is this okay?
Even if it is okay, it bothers me to have to push the engine that high every time I want to accelerate. If it's not under a load, why would the manufacture have the shift points set so high? That said, no matter how I try to manipulate the acceleration, the shift points stay about the same.
I like the idea of reconfiguring the Allison to set the shift points lower. The Cat 3116 seems to have more than enough low end torque to handle a 1,500 RPM shift point when operating without load.
That would be similar to where my dodge diesel shifts. Sure seems like a lot less stress on the engine and trans.
2,500 rpm first gear shifts sounds better. As soon as I got my truck I swapped it to ATF and replaced both the internal and external filters, it smoothed out and ran about 20 degrees cooler. Mine seems to hold for a higher rpm even when accelerating slower as well.
The Cat has tons of torque at lower RPMs so you got me as to why they shift higher. One thing I also had verified was the tach, it took the Cat guy about three minutes to check it and it made me feel a lot better to see that the tach was right on the money.
I think a bit more driving will sort things out and give you an idea what needs checked.