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Old 02-27-2012, 04:02 PM   #1
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Overdrive Question

First off what is overdrive? Do I have overdrive on an automatic transmission? How do you turn it on/off? How do you know when it's on/off? Thanks.

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Old 02-27-2012, 04:05 PM   #2
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What year is your Jeep?

And yes. The top gear is overdrive (4th on a '07-'11, 5th on a '12), but you don't have to do anything to go in or out of it. The computer handles all that.

All overdrive does is gear your drivetrain taller (numerically lower) than 1:1 for improved fuel economy at highway cruise.

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Old 02-27-2012, 04:06 PM   #3
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Overdrive (mechanics) - Wikipedia, the free encyclopedia

As for the specifics of Jeep controls, others can answer that better right now.
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Old 02-27-2012, 04:32 PM   #4
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It's a 2007. People keep saying I need to turn overdrive off with my new setup. I just don't know how.
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Old 02-27-2012, 04:34 PM   #5
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Why would you need to turn it off, unless you put bigger tires on and didn't re-gear, then I could see an issue with it hunting between 3rd and 4th.

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Old 02-27-2012, 04:34 PM   #6
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Quote:
Originally Posted by GoPacers View Post
It's a 2007. People keep saying I need to turn overdrive off with my new setup. I just don't know how.
If you don't have a button to turn it off (can't remember if my 09 had one) just keep it in 3rd.
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Old 02-27-2012, 04:49 PM   #7
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How? It's an automatic.
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Old 02-27-2012, 04:51 PM   #8
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Quote:
Originally Posted by GoPacers View Post
How? It's an automatic.
there should be a button on your shift console... near the shifter
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Old 02-27-2012, 04:52 PM   #9
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How? It's an automatic.
Look at your shifter. You should have P-N-D-3-2-1. Place the shifter on the 3.

In D it will shift to 4th, which is your o/d gear.
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Old 02-27-2012, 04:54 PM   #10
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there should be a button on your shift console... near the shifter
I thought I remembered a button on my 09. Turning o/d off with the button will keep it from shifting into 4th when in drive (D). The same thing as keeping it in 3rd.
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Old 02-27-2012, 04:58 PM   #11
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There is O/D button by your shifter, press it and an O/D off light will come up on your dash.
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Old 02-27-2012, 05:09 PM   #12
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Ohhhh that button. I've never used it once. So with my new tires and lift kit I do not want to press it, or do?

Sorry fellas.
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Old 02-27-2012, 05:33 PM   #13
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Try it with O/D off. See for yourself if it gives you any benefit.
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Old 02-27-2012, 05:45 PM   #14
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Ohhhh that button. I've never used it once. So with my new tires and lift kit I do not want to press it, or do?

Sorry fellas.
How about you give us more info, such as gear ratio and tire size, that would help us to help you.

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Old 02-27-2012, 05:49 PM   #15
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35" tire 3.25" lift 4.10 gear.
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Old 02-27-2012, 05:53 PM   #16
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35" tire 3.25" lift 4.10 gear.
A true 35 or technically a 34" tire...lol
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Old 07-22-2012, 04:30 PM   #17
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My 2012 Wrangler Unlimited Sport has automatic transmission and a button on a panel for overdrive. When I push the button, a light blinks on the instrument panel a couple of times and them goes off. Pushing it again has the same effect. Should the light stay on?
Turning off the overdrive gives engine-braking when going downhill. I've found no other use for it. The automatic transmission takes care of everything else, including towing my boat up and down hills.
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Old 07-22-2012, 04:56 PM   #18
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My 2012 Wrangler Unlimited Sport has automatic transmission and a button on a panel for overdrive
Really?? I dont have an Unlimited but i do have 5 speed automatic and dont seem to have a O/D button....Just being able to manual "slap" shift it is all thats really needed
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Old 08-15-2012, 04:50 PM   #19
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Really?? I dont have an Unlimited but i do have 5 speed automatic and dont seem to have a O/D button....Just being able to manual "slap" shift it is all thats really needed
You probably do have it but don't recognize it. It has a drawing of a Jeep going downhill.
Turning off the overdrive keeps the tranny from shifting into top gear, and gives some engine-braking, but for normal driving, it hurts your fuel economy, which is the whole reason for having a higher gear. I can't find any help in my owners manual.
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Old 09-10-2012, 04:26 PM   #20
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PROBLEM SOLVED! It turns out that the button on the dash is only for 4-wheeling in low range. After checking with the factory, the dealer mechanic taught me about "slap-shifting". I never noticed the numbers next to the shift lever when it is in D. Slapping the shift lever left or right in that position forces the tranny to shift to the desired gear and provides engine-braking. I'm guessing that it also stresses the engine and transmission, and reduces the gas mileage, so don't forget to shift back to 5th gear when you are done "playing".
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Old 09-10-2012, 04:33 PM   #21
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You probably do have it but don't recognize it. It has a drawing of a Jeep going downhill.
Turning off the overdrive keeps the tranny from shifting into top gear, and gives some engine-braking, but for normal driving, it hurts your fuel economy, which is the whole reason for having a higher gear. I can't find any help in my owners manual.
hill descent control is the function of that button
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Old 09-10-2012, 06:36 PM   #22
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Is there a tow/haul button on the newer jeeps like on my Chevys/Fords?


Locks you out of OD.
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Old 09-10-2012, 07:01 PM   #23
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Ya, just to be clear for everyone...this is not overdrive! Lol
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Old 05-16-2015, 08:38 PM   #24
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I have a 2009 Sahara Unlimited Automatic. Lately I am feeling a thump when the transmission shifts in and out of overdrive. Any Suggestions? I have also set it up for flat towing behind my motor home. Heading out in two weeks. Suggestions? ?

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