Hi new here... I have a 90 lx with the aod and 302. When cruising with steady throttle and under low rpms it will chug and buck so hard it will darn near break your neck. If you floor it and drive it like ya stole it it will smooth out and run well. I'm not sure if it's coming from the tranny or the engine. I took it to the shop this past weekend and when they drove it it didn't act up for them so they didn't do anything for me so I took it back after a few days. I had a bad brake booster so I got that fixed and I thought maybe that that was causing the bucking and chugging but it didn't. It's back to running way rough again. Man, why couldn't it have been running bad when at the shop.. ANyways please help, I've been researching and researching and I'm pretty much at a stand still. At first I thought it was torque converter, so I bought one, didn't have it put it because I was told that it wasn't the tc although the mech didnt check he just drove it and said no not that. Anyways help please