Im not sure how my transmission should be properly shifting. Its the stock auto in my 90 SC. It doesnt seem to like to go into overdrive untill im at about 2k RPMs and goin 45-50. i dont know if this is normal or a problem becasue this is my first SC. also sometimes it seems like its goin to downshift when i hit the gas, but it almost, overestimates how far im gettin on the peddle and it revs up like its goin into the gear, then suddenly stop and upshifts again. its something possibly wrong? other than that it shifts fine under pressure and in normal driving