No third gear

2005 GMC ENVOY
188,000 MILES • 4.2L • 6 CYL • 4WD • AUTOMATIC
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STARLORD1976
  • MEMBER
  • 173 POSTS
I already changed fluid and filter. When i drive down the road it will hit first and second with no problem but when it hits third it just revs up and will not go into gear. Is my transmission shot or is there anything else I can try?
Dec 9, 2017 at 9:52 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JIS001
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 3,412 POSTS
A complete tear down is required to find the point of failure. Most likely clutches are worn or maybe a bad band? At this point you may want to look into replacing the transmission now.
Dec 10, 2017 at 4:08 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
It sounds like you have a problem with the second to third shift solenoid. Here is a guide to help you remove the transmission pan so you can do the job:

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

Below are some guides to help you see what the job will be like. Also I have the transmission wiring diagram to help you see which solenoids needs replacement.

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Dec 10, 2017 at 4:14 PM
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STARLORD1976
  • MEMBER
  • 173 POSTS
I also got a P0894 code does that mean anything? Also, the person that had the car drove it low on transmission fluid.
Dec 10, 2017 at 5:29 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
That is a bad sign. It looks like the transmission will need to be replaced or rebuilt.
Dec 15, 2017 at 1:40 PM