Transmission will not shift into overdrive or third gear

Tiny
MARK PARKER2
  • MEMBER
  • 2005 GMC YUKON
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 280,000 MILES
Will not shift into third or overdrive.1st and 2nd gears perfect. Instead of shifting to 3rd it seems to go into neutral.
Wednesday, January 19th, 2022 AT 12:08 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

There is a good possibility it is either the valve body in the transmission or the clutches are burned out inside the transmission.

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

I would start by dropping the pan and looking for debris in the pan's magnet. Check for any chunks as well. This will help me to narrow the area of failure.

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

Roy
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Thursday, January 20th, 2022 AT 6:22 AM

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