Turbo 400 Question - Rapid Shifting

Joined
Aug 16, 2005
Messages
815
Location
El Dorado County CA
My Turbo 400 transmission shifts from 2nd to 3rd and back again rapidly under light load on a level road. I know the vehicle should be in 3rd because the road is level and I am light on the gas. Could it be a vacuum leak? I replaced the hose to the vacuum modulator with no change. Any suggestions would be welcome.

Happy Wheeling.

Jim
 
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