Has anyone rebuilt the 42RLE and went with a different overdrive gear?

Did you ever satisfy your curiosity on this?

Yes, I talked to a number of transmission shops about it and they said it's not possible. Blaine I believe confirmed this as well.

The best solution is simply getting in the habit of turning OD off every time you get in the vehicle. Once I trained myself to do that, it was like driving a totally different vehicle.
 
The best solution is simply getting in the habit of turning OD off every time you get in the vehicle. Once I trained myself to do that, it was like driving a totally different vehicle.
Which was how OD was originally intended to be used when it became popular/common in the 1970s. The first ODs were electric, you had to switch it on the engage it.
 
I wonder if the Ford/GM 10 speed auto could be adapted to a TJ? Check out the ratios:
4.69 : 1
2.98 : 1
2.14 : 1
1.76 : 1
1.52 : 1
1.27 : 1
1.00 : 1
0.85 : 1
0.68 : 1
0.63 : 1
4.86 : 1
 
Which was how OD was originally intended to be used when it became popular/common in the 1970s. The first ODs were electric, you had to switch it on the engage it.

Yep. I always just wish with the 42RLE that it was turned off by default as oppose to having to turn it off every time you get in the vehicle. Oh well, it takes a week or two to pick up the habit, then it's second nature.
 
Well, it's more than just a couple of matching gears to swap out, it's a planetary set. Just ask teraflex how easy it is to make a planetary that lasts more than a couple of years. And I'm not sure if the rear planetary has just OD or if modifying it would change the ratio of other gears as well.
 
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Yep. I always just wish with the 42RLE that it was turned off by default as oppose to having to turn it off every time you get in the vehicle. Oh well, it takes a week or two to pick up the habit, then it's second nature.
Old post but, I saw a mod to put a push button switch on the side of the auto shifter handle. Struck me as a bit odd so I paid attention to the next rig I got into with the shifter and the 42. Your index finger when you grab the shifter to take it out of park is literally closer to the OD off button than it is to a button on the shifter stalk.
 
Old post but, I saw a mod to put a push button switch on the side of the auto shifter handle. Struck me as a bit odd so I paid attention to the next rig I got into with the shifter and the 42. Your index finger when you grab the shifter to take it out of park is literally closer to the OD off button than it is to a button on the shifter stalk.
That’s true. Once you get in the habit it’s not a bad transmission. To be honest, if I could easily swap one into my current rig I would, just because I am starting to not like the manual in the rocks.
 
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I am starting to not like the manual in the rocks.
I started not liking manuals in the rocks in 2003 on a Johnson Valley trail called Sledgehammer. IIRC I was the only one with a manual transmission that weekend.

Joe&Jerry.webp
 
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I started not liking manuals in the rocks in 2003 on a Johnson Valley trail called Sledgehammer. IIRC I was the only one with a manual transmission that weekend.

View attachment 210247
Yep, I am right there with you. I like the manual on the road, but once I get into the tough obstacles I find myself wishing I had an auto.
 
Yep. I always just wish with the 42RLE that it was turned off by default as oppose to having to turn it off every time you get in the vehicle. Oh well, it takes a week or two to pick up the habit, then it's second nature.

I'd bet lunch that wranglerfix could make that happen.
 
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He may not but I bet I know someone who can. We're about to find out if the WF PCM is indeed unable to be programmed.
There would be no reason it couldnt be programmed. I just dont believe he offers anything but factory software.
 
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He may not but I bet I know someone who can. We're about to find out if the WF PCM is indeed unable to be programmed.
Had a phone discussion with wranglerfix a few weeks ago, he can do a lot more but he’s sorting out legal concerns. If you have something you need, you should give him a call.
 
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Our pcms come with stock programming for gears and tires. You can adjust the settings without affecting the pcm’s software. When someone tries to update the software is when the files get corrupted.
 
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Had a phone discussion with wranglerfix a few weeks ago, he can do a lot more but he’s sorting out legal concerns. If you have something you need, you should give him a call.
The legal concerns are, “for off-road purposes only” once a performance tune has been added.
Mark - so the calibration can be changed, just not a complete re-write or software update?
Good morning and yes the calibrations can be changed without corrupting the software.
 
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