Wiring a switch to manually engage overdrive?

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Wiring a switch to manually engage overdrive?

Postby RacinDuallie » Tue Feb 21, 2012 4:50 pm

Can this be done? Truck is a 92 with automatic trans.

If yes please describe proceedure. :oops:
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Re: Wiring a switch to manually engage overdrive?

Postby fatty » Tue Feb 21, 2012 5:31 pm

Yes and it's very easy. It's an orange and green wire (I think it's that color anyways, double check before you go hacking away :D ) on the drivers side of the trans. Cut that wire and run the end that's attached to the trans, to one side of your switch. On the other side of the switch run a wire to a good ground. When your switch is grounded in third gear, overdrive comes on.
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Re: Wiring a switch to manually engage overdrive?

Postby RacinDuallie » Thu Feb 23, 2012 5:43 pm

Got the overdrive working! Stretched her legs out on the highway. :mrgreen:
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Re: Wiring a switch to manually engage overdrive?

Postby dazedandconfused » Thu Feb 23, 2012 7:04 pm

I have mine on a old style floor dimmer switch.
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Re: Wiring a switch to manually engage overdrive?

Postby Tsbourne09 » Fri Feb 24, 2012 9:51 pm

dazedandconfused wrote:I have mine on a old style floor dimmer switch.

that is a great idea!!!! love it! i went through 2 tps sensors, had it on a toggle, now have the dnr tps delete but it goes into od way to late so im going back to the toggle soon.. well was untill i seen what you said you have done. that is a great idea!
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Re: Wiring a switch to manually engage overdrive?

Postby dazedandconfused » Sat Feb 25, 2012 6:10 am

If I leave it on a switch I will change it some. I want to ground it straight to the frame and then run the power side to the switch then to a indicator light so I don't forget it's in OD. Those early morning drives 35 miles one way on the interstate sometimes I forget. I may switch it to my shifter button also since I have a 2nd gen shifter in mine.
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Re: Wiring a switch to manually engage overdrive?

Postby RacinDuallie » Tue Feb 28, 2012 6:57 pm

dazedandconfused wrote: I may switch it to my shifter button also since I have a 2nd gen shifter in mine.


Do you have a 2nd gen tilt column swapped in yours?
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Re: Wiring a switch to manually engage overdrive?

Postby dazedandconfused » Tue Feb 28, 2012 7:08 pm

No I have the first gen tilt colum I just snagged a shift lever out of a 2nd gen and put in mine. I've been thinking more on the indicator light idea. Plan is to run a fused live power to an indicator light then run the ground from the switch to the light and then back down to the trans.
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1983 Dodge D150 that has been repowered with a 93 Cummins/518 running gear AKA The Ugly Duck! I would much rather build them then buy them.
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