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Old 07-16-2014, 11:05 PM   #1
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Overdrive

Is there a general rule of thumb on when to use/not use O/D? I have never turned my O/D off and have had my jeep for a year now.

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Old 07-17-2014, 01:05 AM   #2
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I see your jeep is stock, so probably works best with OD on. Oversize tires on stock gearing can result in some lugging and then people turn it off at times to keep revs in functional range.

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Old 07-17-2014, 08:43 AM   #3
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I see your jeep is stock, so probably works best with OD on. Oversize tires on stock gearing can result in some lugging and then people turn it off at times to keep revs in functional range.
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Old 07-17-2014, 10:14 AM   #4
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Is there a general rule of thumb on when to use/not use O/D? I have never turned my O/D off and have had my jeep for a year now.
with a stock Jeep you really only need to worry about turning OD off when you're towing. in addition to locking out OD it changes the torque converter lockup characteristics which can help reduce fluid temps in high load situations.

you should also install an auxiliary trans cooler and temp gauge so you can keep the trans cool.
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Old 07-17-2014, 11:00 AM   #5
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I had to turn mine off the other week. When I went to see my family I decided we would go driving around in the mountains. I could be wrong but I think they were close to 15% grades. After my trans decided that overdrive was out of the question, it couldn't make up its mind between 2nd and 3rd gear. So I had to put it down in 2. (speeds were very limited for turns and lack of power) I have the 2.4 so it may be different for others.
X2 on the temp gauge and cooler. It's on my to do list
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Old 07-17-2014, 05:57 PM   #6
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I see your jeep is stock, so probably works best with OD on. Oversize tires on stock gearing can result in some lugging and then people turn it off at times to keep revs in functional range.
I just jumped the gun on 33x12.50x15 duratracs, so my jeep is no longer stock I have 3.73 gears. Any other suggestions on when to have O/D on/off? Thanks for the replies guys
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Old 07-17-2014, 10:26 PM   #7
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Yeah, you are probably going to find more times when OD is not helpful. It's really a personal choice. If you feel like you are lugging the engine, turn it off.
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Old 07-19-2014, 05:16 PM   #8
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I've got stock 225 tires, so the automatic tranny with overdrive makes a great highway traveler out of the jeep. I'm usually below 2000 rpm with my 3.07 axle on the highway, and it's a relaxing ride.

Once you get outside of how the factory configured the machine with big tires and such, then all bets are off. That's when the "OD Off" toggle becomes really important.

Personally, I very rarely use the switch, and when I do it's usually at the "on" ramp with a need to merge quickly.
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Old 07-19-2014, 06:15 PM   #9
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I just jumped the gun on 33x12.50x15 duratracs, so my jeep is no longer stock I have 3.73 gears. Any other suggestions on when to have O/D on/off? Thanks for the replies guys
I have 33 bfgs and 3.73

It's on below 40 mph and off above 40 mph. That's how mines runs the most smooth

You hear a lugging sound going in and out when above 40 and the od is on
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Old 07-19-2014, 06:18 PM   #10
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Turn off the Overdrive whenever the engine starts lugging/struggling which with your 33's will be much of the time once you get out of town. I'm running 4.88 gearing with 35's and my Overdrive probably spends more time shut off than on.

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