1993 5.7 350 auto with 162K on stock motor and an unknown amount on 3rd transmission. Pretty far over 100K though. Maybe roughly 110-140K. Happened back in the mid 90s and pops can't remember the exact mileage.
Anyways, been having this problem for awhile but I'll to take this truck to college (4 hours away) and this needs to get resolved. After I hit speeds anywhere above 60 mph be it cruise control or not, the thing will randomly start shaking pretty violently. It's almost as if it's trying to shift but can can't lock in a gear. I have to either mash the throttle to drop a gear or let off the gas to slow down and stop whatever its trying to do. It won't resolve the shake on its own I have to do one or the other. Whenever it's gets up to 80-90 it's pretty much a consistent shake and my speedometer starts spazzing out jumping from 70 to pegged. It shatters my gas mileage too.
What could be the problem? Makes taking the interstate a bear. Other than that though it runs like a top.
Anyways, been having this problem for awhile but I'll to take this truck to college (4 hours away) and this needs to get resolved. After I hit speeds anywhere above 60 mph be it cruise control or not, the thing will randomly start shaking pretty violently. It's almost as if it's trying to shift but can can't lock in a gear. I have to either mash the throttle to drop a gear or let off the gas to slow down and stop whatever its trying to do. It won't resolve the shake on its own I have to do one or the other. Whenever it's gets up to 80-90 it's pretty much a consistent shake and my speedometer starts spazzing out jumping from 70 to pegged. It shatters my gas mileage too.
What could be the problem? Makes taking the interstate a bear. Other than that though it runs like a top.
