What is causing a transmission shudder when shifting at low RPMs?

2002 LINCOLN TOWN CAR
218,450 MILES • V8 • 2WD • AUTOMATIC
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MARTIN GOODMAN
  • MEMBER
  • 2 POSTS
Sounds like a shudder when shifting and low RPMs. Sounds like the tires ran over a washboard. Engine is running smooth, not rough like it needs a tune up. What would cause this?
Jul 24, 2021 at 7:27 AM
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BMDOUBLE
  • ✓Experienced Mechanic
  • 1,139 POSTS
Perform a transmission service with Motorcraft brand mercon V transmission fluid and a new transmission filter. If you find a little plastic plug in the transmission pan when you lower it, don't be alarmed because that is the original dipstick tube plug that gets pushed through during the assembly process. This was part of an old technical bulletin that we got at the dealership level back in the day, and it worked as long as the transmission was healthy.

Here is a guide that should help:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Jul 24, 2021 at 11:38 AM
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