Manual overdrive switch, what happens if left on?

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Manual overdrive switch, what happens if left on?

Postby adcotton » Mon Dec 26, 2016 8:42 am

hoping to find out what will happen if the OD solenoid was left activated when slowing or
Coming to a stop. Is it like a high range and it will go through the gears normally but at a higher ratio, or will it try to pull up to speed from od or what?
Just curious how attentive you need to be when using it and if transmission damage could occur.

Hope ya'll had a merry Christmas!
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Re: Manual overdrive switch, what happens if left on?

Postby DMan1198 » Mon Dec 26, 2016 10:46 am

Ryan Millikan ran his drag truck with od held on. It shifted normally, but it is a lot harder on the trans. He broke a number of intermediate shafts dead hooking 1500+hp, so I think you'd be fine if you accidentally left it on, but it'd be noticeable when you set off again.
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Re: Manual overdrive switch, what happens if left on?

Postby stuffy » Mon Dec 26, 2016 6:30 pm

DMan1198 wrote:Ryan Millikan ran his drag truck with od held on. It shifted normally, but it is a lot harder on the trans. He broke a number of intermediate shafts dead hooking 1500+hp, so I think you'd be fine if you accidentally left it on, but it'd be noticeable when you set off again.


Maybe lockup switch? I don't see how leaving od locked on could break shafts. As I recall it will only use 3rd for less than a second. I did that with mine a time or 2 and no damage occurred. Just slips the converter more
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Re: Manual overdrive switch, what happens if left on?

Postby dazedandconfused » Tue Dec 27, 2016 7:10 am

Mine will skip third when I leave it on.
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Re: Manual overdrive switch, what happens if left on?

Postby adcotton » Tue Dec 27, 2016 7:50 pm

Thank you for the replies guys!
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Re: Manual overdrive switch, what happens if left on?

Postby DMan1198 » Wed Dec 28, 2016 6:51 am

stuffy wrote:
DMan1198 wrote:Ryan Millikan ran his drag truck with od held on. It shifted normally, but it is a lot harder on the trans. He broke a number of intermediate shafts dead hooking 1500+hp, so I think you'd be fine if you accidentally left it on, but it'd be noticeable when you set off again.


Maybe lockup switch? I don't see how leaving od locked on could break shafts. As I recall it will only use 3rd for less than a second. I did that with mine a time or 2 and no damage occurred. Just slips the converter more

He'd brake the intermediate at the line as soon as trans brake was released. It was the "taller" gearing of 1st plus od that they figured was breaking the shafts.; I mean I am talking about a 1500+whp pro street truck here. They're always harder on everything than our 1st gens.
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Jaeger: 12 ram 3500. Lifted, exhausted, and fed an excessive quantity of air
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Re: Manual overdrive switch, what happens if left on?

Postby stuffy » Wed Dec 28, 2016 8:33 am

So it was actually in overdrive in first and second? I guess I've heard that it was possible. Just didn't know anyone actually did it
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Re: Manual overdrive switch, what happens if left on?

Postby DMan1198 » Wed Dec 28, 2016 1:28 pm

Yup. Didn't do it for long though.
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Re: Manual overdrive switch, what happens if left on?

Postby DodgeFreak » Tue Jan 03, 2017 2:51 pm

I've done it in a Manual vb, in a 2nd gen. Didn't notice much different. Leaving the LU on is a different story lol.
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