Trans pan magnet
Hey, my expy has had this intermediate shimmy for awhile at approx 60mph when shifting to 4th gear "low rpm" and gets stuck jumping from 3rd to 4th and back, then goes away. Today it started at 55mph, i eased off the gas and it stabilized. Gave it gas again and it became unstable again, now going 50mph, repeat, 45mph unable to gain speed as the more gas i gave it, the harder it would shimmy, eventually i was going 40mph down the freeway trying to hold it steady. I eventually got off the freeway and headed to the nearest shop. While heading to the shop, my top speed was approx 23mph while shimmying. The shop changed my trans fluid, filter and added a anti slip to the new fluid. I can still feel it wanting to shimmy but its stable for now. Anyone have a clue whats wrong?