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Rebuilt transmission not shifting properly?

Tiny
94K1500SILVERADO
  • MEMBER
  • 1994 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 313,000 MILES
I recently bought a rebuilt transmission from a reputable dealer. When I shift to drive it wants to move but doesn't. I have to shift to first, get up to 10mph, shift to drive and it will shift through the rest of the gears perfectly. When slowing down as soon as it drops below 10 MPH nothing. Then the process starts all over. First, 10 MPH then fine. What could cause this?
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Sunday, March 26th, 2023 AT 8:16 AM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,522 POSTS
It sounds like the pressure regulating solenoid is not working, you will need to drop the pan and change it out here is how in the diagrams below. Please let us know what happens.
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Monday, March 27th, 2023 AT 7:56 AM
Tiny
94K1500SILVERADO
  • MEMBER
  • 6 POSTS
A pressure control solenoid or the pressure switch manifold from the diagram?
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Monday, March 27th, 2023 AT 5:01 PM
Tiny
KEN L
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They are one and the same I believe.
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Wednesday, March 29th, 2023 AT 12:08 PM
Tiny
94K1500SILVERADO
  • MEMBER
  • 6 POSTS
Sorry for taking so long to reply but I just got the pressure switch manifold and I will update you on how it goes. Whether it solves my problem or not. Wish me luck!
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Sunday, April 9th, 2023 AT 5:18 PM
Tiny
KEN L
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Good luck! :)
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Monday, April 10th, 2023 AT 2:23 PM
Tiny
94K1500SILVERADO
  • MEMBER
  • 6 POSTS
I do not like to be the bearer of bad news, but it did not solve the problem. I checked the shift solenoids while I had it open, they were good. Changed the filter and seal. The worst part is there were metal flakes in the pan. Enough to cause concern.
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Monday, April 10th, 2023 AT 4:20 PM
Tiny
KEN L
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I am sorry to hear that, that was our shot to fix it, I sounds like something is broken or not put together correctly and it will need to come back apart.
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Tuesday, April 11th, 2023 AT 11:04 AM
Tiny
94K1500SILVERADO
  • MEMBER
  • 6 POSTS
$2500 down the drain.
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Wednesday, April 12th, 2023 AT 5:40 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,522 POSTS
I am sorry to hear that, it happens.
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Saturday, May 4th, 2024 AT 9:43 AM

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