C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

No downshift on 4l60E!!!

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Old Jun 21, 2008 | 02:37 PM
  #1  
Batyrkhan's Avatar
Batyrkhan
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Default No downshift on 4l60E!!!

Hello Vette Community,
I need your help with trans again. Suddenly my 4l60e transmission stopped downshift (overdrive) . I am not sure if I am naming things correctly, but let me explain. Usuaally when you you push acelerator on any speed it shoudl downshift to previous gear, BUT IT Do
esn'. Generally trans works fine. I have 95 Coupe.
PLease help me to identify the problem.
Batyr
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Old Jun 21, 2008 | 03:22 PM
  #2  
Pete K's Avatar
Pete K
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Scan it. If the tps or other sensor is out of whack, it could cause shift issues.
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Old Jun 21, 2008 | 09:32 PM
  #3  
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rickneworleansla
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Default throttle cable

Check the throttle cable for slack. My throttle was down to around 89% and it would not downshift when floored because the PCM was not reading WOT.
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Old Jun 24, 2008 | 03:35 AM
  #4  
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Batyrkhan
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Thank you Guys!!!
I hope that is the problem.
Pete, your ray of technical spiritual power should help
Thanks
Batyr
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