I have a 2000 2wd Silverado 4.8 V8 with an auto transmission. It has 85000 mi. and I am getting ready to change trans fluid and filter. Just about everybody suggest adding an additive with some type of seal conditioner. (even the local dealer) They say you can expect smoother shifting and longer transmission life. Mine does seem to shift a little harder than it use to. Does anybody have any experiences good or bad with them. And what is a good brand if I decide to use one? Thaks
larryr