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92 s10 blazer. No codes won't down shift.

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  #11  
Old 06-05-2018, 07:12 AM
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No vacuum modulation on 700R4. Uses throttle valve to control pressure through cable. I would look into the backfire issue you are experiencing. There also is a downshift valve that may be sticking or spring broken.
92 s10 blazer. No codes won't down shift.-8b712520-0edf-4e3f-8b04-8ee46fbecf94.jpeg
 
Last edited by Transman304; 06-05-2018 at 07:25 AM.
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  #12  
Old 06-05-2018, 09:28 PM
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Originally Posted by error_401
Interesting. IMHO it's also pointing to some other source of the troubles.

Vacuum leak maybe?
not that I can find.. I hooked up all my vacuum lines when I replaced the distributor. It fixed my 4x4 and a.c. and my cruise control but not this issue. I've got to be missing something
 
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Old 06-06-2018, 04:38 AM
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See Transman's advice. It's sound if all other things are up. Addressing the engine issues may also solve the transmission problem.
 
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Old 06-06-2018, 07:09 PM
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Originally Posted by error_401
See Transman's advice. It's sound if all other things are up. Addressing the engine issues may also solve the transmission problem.
thank you both. Im just home from work and getting on it now. Fingers crossed
 
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