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Old 09-17-2010, 09:37 PM   #1
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Not sure if im going to need to regear.

well next month im starting about 50% of my overhaul of my tj, got about 2500-3000$ i want to put into it.. but my question is, im buying 3.25" or 4" lift and 33" tires, i got the 4banger 2.5l, should i regear to 4.88's and if so wondering how much would it cost.

thanks in advance

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Old 09-17-2010, 10:09 PM   #2
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Your TJ since it's the 4 banger SHOULD have 4.10 gearing. Unfortunately, at 33" tires you're probably going to snail it from the green lights

http://www.wranglerforum.com/f5/gear...der-15944.html

Here's a real helpful thread (I'm not a search basher so don't worry ). Basically, you can get away with the 4.10, but it's painfully slow. If you have the money, then upgrade to the 4.88s. The job at a regular shop costs roughly $1200 as Jerry says, but I know a few of my buddies would do it for me for about $700 including gears, so search around. Times are tough and now that newer cars HAVE to be taken to the dealer for service in many cases, shops are hurting for business (there is a monopoly lawsuit out on this).

The only thing I will say, the 4-banger is a sloth to begin with. If your really looking to go the larger upgrade tire route, my better advice is to sell the 4-banger and use the $1200 extra to buy the 6-cylinder.

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Old 09-17-2010, 10:16 PM   #3
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ya i know its a sloth, i drive my dads 4.0l dodge nitro with supercharger.. pulling 357hp 400ft/tq then go to my 2.5l 4banger with 123hp... i know the difference. but damn 1200$ well i guess ill be a sloth for a while... in march, april im swapin the engine and trans. for what? i got no clue, but im saving 2500$ for current monds, ganna be gone by beginning of november, then strt saving for engine and tranny, then in march buy it, and pop it in!
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Old 09-18-2010, 01:15 AM   #4
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Your going to have to wait to do the gears until after the engine/trans. swap anyway, so my question to you is why would you do the gears twice if your so worried about the cost now?
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Old 09-18-2010, 02:03 AM   #5
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I'd say just wait until you get the lift and tires, engine, whatever you're gonna do to it, drive it, then decide if the gears are worth it. I put 35s on my jeep last year, and am still yet to change gears. I know it's not ideal (or anything close to it), but I still have 3.55s with my manual and 4.0 and I think it's fine. It's well below what any chart would tell me, or anyone on this forum, but I'm comfortable with it and can't justify the cost. Bottom line, try it before you drop the cash.
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Old 09-18-2010, 10:57 AM   #6
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For your 2.5L four-banger engine, you'll want to regear to 4.88 gearing once you install 33" tires. It'd be such a dog without regearing once you install 33" tires that you'll be highly motiviated to regear.

That 4.88 recommendation assumes you have the 5-speed manual transmission, go with 4.56 if you have the 3-speed automatic. Typical cost to regear is about $1200.
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Old 09-18-2010, 01:31 PM   #7
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Quote:
Originally Posted by jeepjones View Post
so my question to you is why would you do the gears twice if your so worried about the cost now?
i wasnt going to do them anytime soon, my question was more asking about it, to see just how much it cost, if it was cheaperr id go for it now, but at 1200 ill wait till after my swap
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Old 09-18-2010, 01:33 PM   #8
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Quote:
Originally Posted by Jerry Bransford View Post
For your 2.5L four-banger engine, you'll want to regear to 4.88 gearing once you install 33" tires. It'd be such a dog without regearing once you install 33" tires that you'll be highly motiviated to regear.

That 4.88 recommendation assumes you have the 5-speed manual transmission, go with 4.56 if you have the 3-speed automatic. Typical cost to regear is about $1200.
yeah i got the 5 speed, i cnt stand the 3 speed auto in the jeep, my cousin used to have it, and i drove his jeep once, and thts it never touched it again, i love being part of the jeep, auto makes me less concentrated and bored out of my mind ! lol
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Old 09-18-2010, 04:45 PM   #9
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I have the 2.5 with 4.88s and its a dog on the road but alot better than the 4.10 gears but Ill tell you when im in the woods I do great with 35s im going to stick with it till it dies cause I rarely drive it on the road
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Old 09-18-2010, 04:52 PM   #10
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the 4 banger does good offroad that to me isnt a issue, neither is the fact my car is ganna be a sloth, i onistly just love the jeep bc well READ my signature and also i got an other car if im in that speeding mood, a JEEP isnt a sports car!

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