Transmission not working properly

2003 CHEVROLET TRAILBLAZER
220,000 MILES • 0.6L • 6 CYL • 4WD • AUTOMATIC
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BRIANJBOY
  • MEMBER
  • 2 POSTS
While driving, my transmission began to act like it was in neutral. Gas only revs the engine.
No check engine light comes on.
When trying to Shift, no gear is available although dash shows the selection.
You can hear solenoids moving when switching between 2-wheel / 4-wheel drive but car does not move, just revs the rpm’s….
The linkage is connected and moves the controller attached to the transmission under the car…..
I hadn’t experienced any prior slipping of the transmission.
There is nothing leaking under the car.
Fluid levels are fine…
What can the trouble be?
I can see many other Trailblazer owners experiencing the same issue with no resolve!
Thanks!
Mar 23, 2022 at 1:36 PM
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ASEMASTER6371
  • ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

I would drop the pan and change the filter. It may be clogged, not allowing fluid flow in the unit.

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

Beyond that, it is an internal failure.

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

Roy
Mar 24, 2022 at 7:10 AM
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BRIANJBOY
  • MEMBER
  • 2 POSTS
Thanks Roy.
I dropped the pan, replaced all 4 transmission solenoids, installed a new filter and changed fluid.
(I noticed normal metal wearing in pan. No broken pieces.)
But no change to problem.
Still No codes on obd2 reader.
Where is the “front pump” located?
Mar 24, 2022 at 11:07 AM
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ASEMASTER6371
  • ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Behind the torque converter. The converter is a common failure.

Roy
Mar 24, 2022 at 11:30 AM
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