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Old 09-29-2011, 05:31 PM
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Ideal tire size for 4.56 gears?

2006, stock non-Rubicon 42RLE tranny, stock non-Rubicon t-case, 4.56 gears, 33 x 12.5 x 15 BF Goodrich T/A KO tires.

With the 33s it bogs down often. Going up a hill in a 40mph zone consists of 2 options: constant shifting between bogging/slowing down and revving until exceeding the speed limit, or turning off O/D to stay in 3rd gear.

Since it's far easier to get a smaller tire than it is to change the gears again, I'll just step down in tire size if that makes a better daily driver setup.

Or, maybe the problem is the 42RLE and I can't do anything about it?

This Wrangler will "sometimes" go off road. Like, 2 or 3 times a year. Which is to say, it doesn't need 33s. 30s or 31s would be fine.
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Old 11-02-2011, 01:37 PM
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Re: Ideal tire size for 4.56 gears?

I have a 92 YJ Sahara (4.0 6) 5 speed manual trans. with the same tires and 4.56 gears and have had no problem like that. I could run 35's with the 4.56 gears and it would put me back around what it was with the original gears and the original tires.
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Old 11-03-2011, 12:41 PM
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Re: Ideal tire size for 4.56 gears?

Quote:
Originally Posted by Kev- View Post
2006, stock non-Rubicon 42RLE tranny, stock non-Rubicon t-case, 4.56 gears, 33 x 12.5 x 15 BF Goodrich T/A KO tires.

With the 33s it bogs down often. Going up a hill in a 40mph zone consists of 2 options: constant shifting between bogging/slowing down and revving until exceeding the speed limit, or turning off O/D to stay in 3rd gear.

Since it's far easier to get a smaller tire than it is to change the gears again, I'll just step down in tire size if that makes a better daily driver setup.

Or, maybe the problem is the 42RLE and I can't do anything about it?

This Wrangler will "sometimes" go off road. Like, 2 or 3 times a year. Which is to say, it doesn't need 33s. 30s or 31s would be fine.
Have the auto shift points been recalibrated for the new gear/tire sizes?
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