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What up transmission won't go in reverse when first cranked up until after 5 min
1990 Chevrolet 1500 Pickup

What up transmission won't go in reverse when first cranked up until after 5 min

(1990 Chevrolet 1500 Pickup)
The Transmissions never been serviced the transmission goes in reverse after running for 10 to 15 minutes what is the problem
What seems to make the problem better or worse? It's better when started 5 to 10 minutes
Tags: chevrolet, 1500 pickup
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1 answer & 1 comment
Popular Answer
on May 05, 2019

1. Slow, slipping or no reverse:
“lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the transmission may help (must remove valve body), or adding a high-viscosity additive or other seal restorer product. May also have worn boost valve (can replace in the pan).
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on May 05, 2019

Well beyond average automobile repair experience required..
Automatic Transmission Diagnosis
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on May 05, 2019

1. Slow, slipping or no reverse:
“lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the transmission may help (must remove valve body), or adding a high-viscosity additive or other seal restorer product. May also have worn boost valve (can replace in the pan).
Sign in to reply
on May 05, 2019

Well beyond average automobile repair experience required..

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