When to regear? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 15 Old 08-31-2009, 05:46 AM Thread Starter
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When to regear?

I know this has been beat to death but i cant get a definative answer for my specific case. 2" BB on a 2008 2 door jk 6spd
what kind of gears are needed if any for a set of 33's
and
what kind of gears are needed if any for a set of 35's
(cant decide on size yet)
also how do yall do it... dealership, shop, yourself? and how much does it run?
man i got my jeep 2 weeks ago and already i found a million things i want to do to it!
Thanks yall
keith
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post #2 of 15 Old 08-31-2009, 05:59 AM
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Quote:
Originally Posted by klutz1001 View Post
I know this has been beat to death but i cant get a definative answer for my specific case. 2" BB on a 2008 2 door jk 6spd
what kind of gears are needed if any for a set of 33's
and
what kind of gears are needed if any for a set of 35's
(cant decide on size yet)
also how do yall do it... dealership, shop, yourself? and how much does it run?
man i got my jeep 2 weeks ago and already i found a million things i want to do to it!
Thanks yall
keith
This is just my opinion... some might agree, some may not.

If you are doing a 2 inch lift and 33's - you don't need to regear (assuming you have 4.10's)

If you have a 2 inch lift and 35's - it's questionable - I have 4.10's and thought about changing out the gears. I got a superchips programmer which recalibrated the speedometer, so my shift points were back on target. It use to downshift when i was going over an overpass. It no longer does this. I have no plans in changing out my gears now.

If you are changing out your gears - I'd suggest to take it to a shop and get it done right unless you have expierence in doing this stuff.
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post #3 of 15 Old 08-31-2009, 06:16 AM Thread Starter
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it's the 6spd... dont know if you saw that... i was under the impression i had 3.21 gears??
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post #4 of 15 Old 08-31-2009, 06:34 AM
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I think your fine for 33's since you have a manual, but you'll probably want to regear to 4.88 if you go 35s... I have 513 and 35's but I'm auto
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post #5 of 15 Old 08-31-2009, 06:35 AM
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non- rubi? then yes, 3.21. With 33's or 35's you probably wont need to regear, at least not immediately... For the 35's it will be under powered for sure. Use that time to assess what your doing with your jeep and how under powered it feels... get gears based on that. The 6sp can hold a numerically lower gear ratio than the auto.

I'm running 4.10's with 35's in my auto for about 6 months and while I plan to regear, it probably wont happen for a while.

You could probably find a cheap set of 4.10 (~$100) on one of the forums and upgrade to that for little cost.

Best gearing for 35's on a 6sp seems to be either 4.88s or 5.13's.

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post #6 of 15 Old 08-31-2009, 07:48 AM
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it's the 6spd... dont know if you saw that... i was under the impression i had 3.21 gears??
It might have the 3.73's. If you've got the tow package, then you have them and it's also possible that it was given the $50 gear option for the 3.73's even without the tow package.


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post #7 of 15 Old 08-31-2009, 10:35 AM
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So...33" with 3.73's with an auto should be okay?
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post #8 of 15 Old 08-31-2009, 10:36 AM
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I've got the 3.21's with 285/75R16's (works out to about 32.8") and I wish I could regear. I can get around most everywhere with a little bit more skinny pedal but honestly the Jeep will not climb steeps without stalling and it's kind of a slug. I spend most of my trail time in 4L running in 4th gear just because I don't want to bog down and stall in sand when the going gets slow.

Unless you know what your doing, leave the gear swap to a professional shop. And I highly recommend you ask around/shop around before you drop $1200-$1500 on the swap. Gear installs require a degree of skill, knowledge and special tools that most shadetree machanics do not have and I don't know about your area but there are a handful of gear shops in my area that I have heard nothing but bad stuff about.

Me personally? I'm waiting to regear when I get my next set of shoes, probably early next year sometime and then I will be looking at moving up to 35's and a 5.13 gear.


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post #9 of 15 Old 08-31-2009, 11:45 AM
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I have the 6 speed Rubi and with 35's and the 4.10's it was a dog on hills. Also couldn't use 4 hi on any kind of moderate rough stuff, so always had to run 4lo. Went to 4.88's and all my troubles went away. 4hi works better and I can pull grades fully loaded without having to downshift.
I have my 4.10 takeoffs with about 15k miles on them but never abused. I don't know if they will fit your carrier but I'll let them go for $50'ish bucks+ shipping. Again don't know if they'll fit your carrier.
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post #10 of 15 Old 08-31-2009, 12:26 PM
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I have a 2.5" lift with 33's and have not had any problems with the gears (I have an automatic). I noticed a little bit loss of power when I went to the 33's but nothing too bad. Ran it in 4hi last weekend for a little bit and also had no problems. I'm no expert, but I'd say try it without re-gearing for a little bit and see how much it bothers you. Good luck!
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post #11 of 15 Old 08-31-2009, 12:26 PM
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I have a 6 speed x with Rubi wheels and tires and 3.21 gears. I do pretty well all around. When I go to 33's I'm going to regear to 3.73. You can go to 4.10's if you want but I think the 3.73 should do fine.
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post #12 of 15 Old 08-31-2009, 03:52 PM Thread Starter
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ok... all good info... just dont wanna pay the price... what do yall think about programers/superchips
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post #13 of 15 Old 08-31-2009, 04:08 PM
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ok... all good info... just dont wanna pay the price...
If you've got the 3.21's and 6 spd I would not go with 35's. Stick to a 33 and you'll be able to get around just fine until you can save up the duckets for some gears.

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post #14 of 15 Old 08-31-2009, 04:58 PM
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I have a 6 speed x with Rubi wheels and tires and 3.21 gears. I do pretty well all around. When I go to 33's I'm going to regear to 3.73. You can go to 4.10's if you want but I think the 3.73 should do fine.
are you really going to bother paying all that money to regear to 3.73 for 33in tires, that are only 1in bigger then what u have now? I'd have to say IMO thats a complete waste of money. You arent even going to what stock rubi's run with 32's why bother? Unless you are getting gears and labor for free.


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post #15 of 15 Old 08-31-2009, 06:01 PM
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are you really going to bother paying all that money to regear to 3.73 for 33in tires, that are only 1in bigger then what u have now? I'd have to say IMO thats a complete waste of money. You arent even going to what stock rubi's run with 32's why bother? Unless you are getting gears and labor for free.
i must agree dont waste ur money one 3.73s get u some 488s and when u go to 35s it will be very drivable still


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