I have a 653 trans that we are getting ready to use in a fire dept rescue truck and have some questions on the shift points the 2/3 shift is at 2200 rpms the truck is a 96 IH 4700 was a electric company truck. The 3/4 and the 4/5 is at 2200 rpm also. Is the 2/3 shift point too high? if so how do we adjust it? we are a small dept with little funds any help would be greatly appreciated