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Transmission not shifting properly

Tiny
MATEO LIBONATI
  • MEMBER
  • 1999 MITSUBISHI TRUCK
  • 1.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
The box truck runs fine but the transmission will not auto shift on it own; once I stop I must manually place auto lever in lowest gear then manually shift it up to next higher gear to make transmission achieve higher gears.
is there a module of some type that's gone bad or is transmission on its way out?

thanks
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Saturday, March 13th, 2021 AT 11:01 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
It could be an internal issue. However, if you can shift it manually, the clutches sound fine. The first thing I would check is the transmission fluid. Check to make sure it is full and its condition.

Also, I am not showing this vehicle as a "truck". What model is it? Was the transmission fluid ever changed?

Let me know.

Take care and God Bless,
Joe
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Monday, March 15th, 2021 AT 6:20 PM

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