Hi all,
I have an 86 cutlass supreme 3.8 v6 3 speed auto. If I accelerate hard, 3/4+ throttle, or the car downshifts to 2nd going uphill, the engine will begin bucking, jerking and losing power around 50 mph. If I lock it in 2nd gear I can slowly take it up to 60 mph with no trouble and I can...