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

Tiny
BOBBY EVERITTE
  • MEMBER
  • 1990 CADILLAC FLEETWOOD BROUGHAM
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
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
Friday, November 6th, 2020 AT 10:57 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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

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Friday, November 6th, 2020 AT 12:43 PM

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