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

clutch changed, overdrive not working now

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Old Oct 8, 2011 | 09:57 PM
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84dream
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From: el paso texas
Default clutch changed, overdrive not working now

hey guys,
i have a 1984 which i recently changed the clutch in. during that process i had dropped the pan for the OD unit, i changed the filter and the fluid along with it. today before i left the shop i had filled the OD unit up completely. i went for a test drive, noticing that when i hit the OD switch on the console it didnt kick into overdrive, not did the light come on. after searching the forums for possible answers ive come to a couple conclusions. ive read that if the unit reads low pressure it will disable it. could it just be that i need to add more fluid since i have drove around and the fluid has circulated through the system? or could it be something along the lines of a electrical connector or a relay?

im going to the shop tomorrow morning to see if it needs more fluid and to check the above mentioned items. any advice would be greatly appreciated!
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Old Oct 9, 2011 | 12:41 AM
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vetteoz
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Originally Posted by 84dream
.when i hit the OD switch on the console it didnt kick into overdrive,
On a 84, hitting the O/d defeat switch disables the O/d
By default , the O/d is automatically engaged by the ECM when right conditions are met unless driver over rides ECM by use of the switch

Originally Posted by 84dream
.... not did the light come on....or could it be something along the lines of a electrical connector or a relay?
You have a problem with the power supply to solenoid
Light shows power " available" on solenoid side of O/d switch;not that O/d is actually engaged

Check 1st gear switch and O/d switch for correct operation


Last edited by vetteoz; Oct 9, 2011 at 12:44 AM.
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Old Oct 9, 2011 | 01:12 AM
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84dream
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Thanks for the valuable information. I'll be sure to check it out tomorrow!
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Old Oct 9, 2011 | 02:24 PM
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84dream
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update:
took it to the shop today, fluid was topped off, turns out my first gear switch wasnt connected fully. i pushed it in and works like a charm now. whew
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