So, I have a 86 v6 auto. It was running fine, put gas in drove 5 miles parked. Later that night went to get food was fine, leaving food place the exit has a bit of height to it so it was about a 2 inch drop. kinda heard a bang didn't worry. At the stop light ahead I noticed the car was vibrating a bit harsh. While taking the girlfriend home, I noticed a loss of power about 10 minutes down the road, intense shaking and the noise was way of key.
I stopped at walmart grabbed some more oil, and some octane booster. but That wouldn't have made a huge difference instantly drove last half hour home but had no improvment. When I put it in park it ran normal. Odd, threw it in reverse and drive again and shook like crazy. Had girlfriend try it while I looked at engine, I noticed something interesting. Park engine sits normal, any other gear you see it slam up almost tilting but it sits realitvly still while in gear just a giant jump from park to any gear.
I'm thinking either an issue with tranny, or a broken mount but would a bad mount effect power, and sound?
Sounds like a broken moror mount, is the dog bone still attached? When it shifts over it may be shorting out a plug or two, and you could have broken the exhaust. Larry
sounds like a mount is loose or bad. As for the noise it may make one if it is loose enough. i wouldn't think it would effect performance but im not sure. Maybe someone else on here might have a better Idea.
I would bet on the cat converter. Had the same problem on the 85. Parts were loose in the cat causing noise and power loss due to parts shifting inside cat and blocking exhaust path.
