well i think its time to upgrade my auto trany, it's started slippen real bad today ....i did a search and found a shift kit at transgo for our 48res but has some one here done the kit from them or some one tryed a better kit??...how munch should i expect to pay for a auto shift kit installed. i'm going thru the phone book now to try to get some priceing and some one to do the job?....i only have 21,650 miles on the truck .....o k 21,650 hard miles....thanks for the input....fast fred