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

Doug nash 4+3 shift issues

 
Old 04-14-2019, 01:47 PM
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Johnny Harkey
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Default Doug nash 4+3 shift issues

I am the proud owner of a 1984 with the 4+3. The overdrive has began acting erratic. At times it will drop out of overdrive while on the highway. At times it will not engage overdrive when it its turned on. I have changed the fluid and filter. This helped with hard shift it was having and that clunk as it shifted out of overdrive automatically when reducing speed. I suspect a pressure switch problem in the overdrive. Is it possible to jump or bypass this for diagnostic purposes?
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Old 04-14-2019, 03:08 PM
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jv9999
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Yes, you can just jumper the pressure switch for testing purposes.
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Old 04-14-2019, 04:05 PM
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Johnny Harkey
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Originally Posted by jv9999 View Post
Yes, you can just jumper the pressure switch for testing purposes.
I will give that a shot when i get it up on jack stands next time. I may be putting off the inevitable of changing whole setup to a 6 speed. 😑
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