Upshifts normally until it suddenly downshifts

1990 DODGE CARAVAN
270,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JAY STERN
  • MEMBER
  • 1 POST
(Caravan with just front seats). Vehicle starts, moves in all gears. Upshifts normally until it suddenly downshifts. Turn off engine. Restart and shifts normally for few minutes, then downshifts again. Is this a solenoid problem or are the transmission bands gone and tranny must be rebuilt?
Jul 18, 2021 at 5:16 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

This sounds like a valve body issue within the transmission.

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

I would start by changing the fluid and filter. Pay close attention to the bottom of the pan and see if there is any metal in the pan. If there is metal in the pan, then most likely you will be talking about a rebuild or replacement.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy

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Jul 18, 2021 at 9:10 PM
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