When driving 65-75 mph car bucking, spitting, jerking

1990 CADILLAC FLEETWOOD BROUGHAM
180,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
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BOBBY EVERITTE
  • MEMBER
  • 1 POST
Starting, warming, uptake off. The cars performance is okay, you smash the gas it goes. But when you get to cruising speed it lets say 65-75 mph it starts bucking spitting jerking like crazy.
Please help. Thank you
Nov 6, 2020 at 10:57 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon,

This sounds like the torque converter in the the transmission. There are clutches in the converter and when they are slipping, it will create this condition.

I would go to a parts store and get the additive for torque converter shutter. Add it to the fluid and drive it. It should take effect in about 20 miles.

https://www.2carpros.com/articles/automatic-transmission-problems

If it goes away then that is the issue. In that case the torque converter needs to be replaced.

Roy

Nov 6, 2020 at 12:43 PM
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