Overdrive wiring question

chappy · 01-18-2012, 04:34 PM

84 vette;
I want to have the overdrive operate only in 4th gear when the switch is ON and automatically goes off when i leave 4th.
Any idea's before i dig into wiring diagram ??
Thanks mates.

chappy · 01-19-2012, 04:40 PM

I figured it out by replacing the 4th gear switch with one that is Normally closed vs the normally open....You can buy them at napa and they come out of an 88 chevy pick-up transfer case about $20.00....Then there's the wiring fun, which is long in the tooth and a heartache to explain!!!
Run's great having overdrive only engage in 4th because you dont have any thump or feel as it comes on when you are just hitting 4th. You still have the switch option on the console.

01-18-2012, 04:34 PM	#1
chappy Smokin 500HP Club Join Date: Jul 2008 Location: Mid West Posts: 561 My Gallery	Overdrive wiring question 84 vette; I want to have the overdrive operate only in 4th gear when the switch is ON and automatically goes off when i leave 4th. Any idea's before i dig into wiring diagram ?? Thanks mates.

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01-19-2012, 04:40 PM	#2
chappy Smokin 500HP Club Join Date: Jul 2008 Location: Mid West Posts: 561 My Gallery	I figured it out by replacing the 4th gear switch with one that is Normally closed vs the normally open....You can buy them at napa and they come out of an 88 chevy pick-up transfer case about $20.00....Then there's the wiring fun, which is long in the tooth and a heartache to explain!!! Run's great having overdrive only engage in 4th because you dont have any thump or feel as it comes on when you are just hitting 4th. You still have the switch option on the console.

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