I regeared my 86 auto with 4.88's, it does make a big difference since those big tires soak up power and that auto soaks up at least 15% of your hp over a stick which is 0%. My 86 was a turbo but I think the results will be the same. It definatly helps offroad too in the rocks and climbing hills and such, but nothing will help downhill except finding the wire for that electric torque converter and putting a switch on it so that it doesn't go into the stall mode. That was on my list of to-do's but I sold it before I tried it. If you find the wire you just have to be very careful if you shut it off, you'll blow the converter if you stop with it in the off position.
