2001 Chevy Silverado Hard shift 1 to 2

2001 CHEVROLET SILVERADO
143,000 MILES • V8 • 4WD • AUTOMATIC
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BROWNJOE
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  • 1 POST
I had my auto trans rebuilt and it shifts hard 1 to 2 what controlls the shift is it in the trans or something called the throtle position sensor???

Joe
Oct 10, 2010 at 1:48 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
The TCM (trans control module) controls when the shift happens. However, the shift solenoid makes it shift. Is the engine reving higher than normal before shifting? Have any warning lights come on?

Let me know.

Joe
Oct 10, 2010 at 3:41 PM
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BROWNJOE
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No the engine rpms don't change, just shifts hard and quick, no engine lights.

joe
Oct 10, 2010 at 8:58 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
It sounds like a bad shift solenoid. I would have that checked first.

Let me know what you find.
Joe
Oct 11, 2010 at 4:14 AM
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