patdaly

Not unless you figure out a different (double pole) switch for your overdrive disengage button.

If you route either a pressure or manual switch through the same contacts as you have your OD on, it could lead to unpredictable operation. What you would need is a double pole, single throw switch ( DPST ) where one set of contacts routed the OD and the other routed the TCLU. That way, when you manually locked out OD, the TCLU would follow.

Angry Johnny

It should start off in 1st even without the O/D hooked up. You probably have a governor valve sticking. But I have to ask why did you have the O/D hooked up to a switch to begin with?

1991.5 mopar

I bought it that way. I don't know why it was like that. The 2 prong overdrive plug just hangs there. Maybe I'll call the trans shop about it not starting in 1st with out overdrive hooked up. That is just what they told me

1991.5 mopar

It took patdaly advice and hooked it up the way he said and it works! Thanks for the help. The truck still doesn't start off in first gear though

Angry Johnny

If the trans shop told you that they are wrong. Does it start off in first gear if you put it in neutral and then back to drive? If it does but doesn't down shift back to first after coming to a stop then most likely a governor valve is sticking, pretty common. If it never starts off in first after being put into drive from park or neutral then there are other problems.

patdaly

AJ, thanks for hopping in, man I wish I had the experience on Torqueflites some of Y'all do around here.

Angry Johnny

I spent over 30 years as a trans tech at a Dodge dealer.

1991.5 mopar

Thanks. I'll call them today and tell them that.

1991.5 mopar

Angry Johnny what would be a good power source to run to the center wire on the overdrive plug?

j_martin

I'd pick up the A21 switched power circuit, available at the grid heater relays. Dark blue wire to a coil terminal. If the grid heater relays have been deleted, pick up the circuit at the ASD relay, same color.

1991.5 mopar

Is it okay if I run it straight to the battery? And what does asd stand for?

j_martin

1. no
2. Automatic Shut Down. It's on the driver's fender and easy to get to.

1991.5 mopar

What's bad about running it to the battery? And is it one of the studs with rubber caps on it?

j_martin

If you leave a switch on, you'll kill the battery, and maybe damage a solenoid. (they might depend on a little oil splash for cooling.)

Follow the blue wire. It would be on one of the smaller studs. Check it with a test light. Should have power when the ignition switch is on.

1991.5 mopar

I leave the switches off but I'll definately look into putting it on the asd. The truck goes off to the trans shop tomorrow to figure out why it's not starting in first gear