34" Swampers with the 2.5? - JeepForum.com

 
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post #1 of 3 Old 06-22-2009, 07:31 PM Thread Starter
Kman1983
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1983 CJ5 
 
Join Date: Aug 2008
Posts: 355
34" Swampers with the 2.5?

Anyone running 34x10.50 Swamper LTB's on their YJ with the 2.5? My wifes '93 Wrangler has the 2.5, AX5, 4.10's with 4" spring lift and 1" BL.

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post #2 of 3 Old 06-23-2009, 11:42 AM
jdarg
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2006 LJ Wrangler 
 
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I just finished rebuilding my YJ and ran this exact setup. I hoped to get by with the 4.10 gears based on comments I read here that it wasn't that bad. Well it was a -complete- dog. Fourth and fifth gear were both totally useless. Top speed was about 55mph winding out 3rd around 4K. Anyone who thinks this combo works probably didn't compensate correctly for their speedo being off ~ 20%.

So I regeared to 4.88 and thought it would be all better. Not quite. I still don't really have use of 5th on the highway. I can run to 65mph in fourth floored - but it takes a while to get there. If its hilly or windy it can't maintain speed even floored.

That LTB is a heavy tire...it weighs more than the Dunlop 33x12.5 radial tires I have on my other jeep. You may have better luck with the lightest alum. rims you can afford and a lighter 33" radial.

'94 YJ - SBC/AX15/231, SOA, 8.8, 34" swampers
'06 LJ Rubicon - 31" ATs, OME 2.5", belly-up skid, other junk
'75 CJ5 - 232/T14/D20, 'glass tub w/ 2" BL, otherwise stock
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post #3 of 3 Old 06-23-2009, 11:53 AM
bmgadg
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1992 YJ Wrangler 
 
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Quote:
Originally Posted by jdarg View Post
I just finished rebuilding my YJ and ran this exact setup. I hoped to get by with the 4.10 gears based on comments I read here that it wasn't that bad. Well it was a -complete- dog. Fourth and fifth gear were both totally useless. Top speed was about 55mph winding out 3rd around 4K. Anyone who thinks this combo works probably didn't compensate correctly for their speedo being off ~ 20%.

So I regeared to 4.88 and thought it would be all better. Not quite. I still don't really have use of 5th on the highway. I can run to 65mph in fourth floored - but it takes a while to get there. If its hilly or windy it can't maintain speed even floored.
Agreed, I had this setup before I swapped a 4.0 into mine, it's REALLY underpowered. Even with 4.10s the top speed for me was like 55. And it was really bad when climbing hills offroad too.

If you're going to put oversize tires on a 2.5 you better gear it deep.
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