I am sure this has been discussed before, but who uses it and how? I have a 1 ton diesel dually and will be towing a 5500 lb (dry) trailer. I am assuming it will lower fuel economy? Am I correct in as...
S.R.Joe- my Allison is 100 times better than any tranny your pappy used. I'm not hurting it one bit. I went from 2.45's to 2.65's on my 07 Chevy Duramax and have found I get better mileage even when not towing in T/H