Rebuilt transmission not shifting properly?

1994 CHEVROLET SILVERADO
313,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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94K1500SILVERADO
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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?
Mar 26, 2023 at 1:16 AM
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STRAILER
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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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Mar 27, 2023 at 12:56 AM
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94K1500SILVERADO
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A pressure control solenoid or the pressure switch manifold from the diagram??
Mar 27, 2023 at 10:01 AM
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STRAILER
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They are one and the same I believe.
Mar 29, 2023 at 5:08 AM
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94K1500SILVERADO
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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!
Apr 9, 2023 at 10:18 AM
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STRAILER
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Good luck! :)
Apr 10, 2023 at 7:23 AM
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94K1500SILVERADO
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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.
Apr 10, 2023 at 9:20 AM
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STRAILER
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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.
Apr 11, 2023 at 4:04 AM
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94K1500SILVERADO
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$2500 down the drain.
Apr 11, 2023 at 10:40 PM
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STRAILER
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I am sorry to hear that, it happens.
May 4, 2024 at 2:43 AM
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