i would also suggest a shift kit, that has helped in making my tranny shift a little quicker. u have to make sure to do the "shuffle" thing, cause if u just go 1st to 3rd, you'll your eventually burn out your tranny. i find with the shift kit i don't have to wait as long when going fom 1st to D then back to 1st, for second. its more like one quick motion, and it will save time in the quarter. oh and i haven't had a problem with my tranny when it heats up.
dinomite is right about the shift points, 4800 is safe for your stocker!
------------------
89 GT AOD w/ shift kit, B&M rachet shifter, Trickflow intake, Crane (E-type) cam, 70Tb, 75MAF, 1.6 Rockers, Pulleys, MAC headers and H-pipe, Dynomax mufflers, K&N, 3 core radiator, custom interior, cobra R rims
MY89GT