Originally Posted By: JustN89
I'm also about to do this as well, only for my '05 Impala. It's got the notorious hard shift when the trans reaches operating temp. I'm replacing the filter (went with the Wix from RockAuto), putting in Maxlife Dex/Merc Full Synthetic, putting in a TransGo Shift Kit, installing a retainer clip for the actuator tubing, inserting two more magnets and then putting on a Dorman pan (hope my experience is better than 901Memphis's). From everything I've read, the Maxlife Dex/Merc has worked really well in these transmissions.
I had one of the Dorman pans and returned it because it looked slightly shallower than my original, anyway by dropping the pan, you can change the filter at the same time. On the 4T65E, I wouldn't do just a drain without doing the filter.