Re-gearing - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 5 Old 04-24-2010, 10:55 PM Thread Starter
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Re-gearing

So this is a show of ignorance here but I'm going to ask the question so I know...

Can someone explain to me the purpose of re-gearing? What's do the ratios mean? What's a good ratio to have?

Danny

2008 Wrangler X
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post #2 of 5 Old 04-24-2010, 11:20 PM
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When upgrading your tires to a larger size, the factory gearing also needs to come up, so that the vehicle is back closer to stock setting. With larger tires (and no re-gearing), the acceleration sometimes becomes an issue. It isn't as bad in manuals due to having the ability to manually manipulate your shift points, but in automatics, there can be a very sluggish feel with bigger tires and OEM gearing (3:73's or 4:10's).

For the JK.....

Manual trans- with 33's- OEM gearing might feel okay.
Manual trans- with 35's- might want to go with 4:88's.
Manual trans- with 37's- might want to go with 5:13's.

Auto trans- with 33's- might want to go with a 4:88's.
Auto trans- with 35's- might want to go with a 5:13's.
Auto trans- with 37's- might want to go with a 5:38's.

Some may re-gear differently than this- but as a reference, these are generally the most popular tire/ gearing combination's that I have seen.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
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post #3 of 5 Old 04-24-2010, 11:35 PM Thread Starter
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so how much would it cost to regear and is it absolutely necessary to do so for 33's? I have an Auto

Danny

2008 Wrangler X
-3.5" Rubicon Express Lift
-Rancho RS9000XL Shocks
-Rancho High-clearance Steering Stab
-Rugged Ridge Mirror Relocation Brackets
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post #4 of 5 Old 04-24-2010, 11:49 PM
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As low as maybe $800 (gears/ labor/ fluid/ etc), and I've seen gear installs at $1200+. Depends a lot on your location, and the shop itself.

Gear installs are one of those areas, that is worth paying more to a shop with a lot of experience and a great reputation....than to save a few bucks. A gear install is not complicated, but it is very precise, and should be performed by someone that has done many and is reputable. I would also ask a shop how many Jeep JK's they have done.....(piece of mind knowing that your JK is not a guinea pig- lol).

Whether or not it is worth doing is up to you. If you think your JK feels as if it has lost a lot of performance since upgrading tires (on-road/ off-road/ acceleration/ mpg's/ etc), than you might want to look into it, but if you think it feels okay- then don't worry about it.

If you don't have 33's yet- you might want to do them first, and see how it feels with the stock gearing. Some will feel okay with that set-up....others will not.

Poly Performance - Dynatrac - Currie - Goodyear - Poison Spyder - Warn - PSC - AEV - Reid Racing - Off-Road Evolution - Flowmaster - Delta - Riddler - Micky Thompson - Daystar - Skid Row - Uniden - Rebel Offroad - Firestik - Warrior Products - Viair - HiLift - ARB - Kicker - Infinity
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post #5 of 5 Old 04-25-2010, 10:17 AM
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Quote:
Originally Posted by StubEXrube View Post
As low as maybe $800 (gears/ labor/ fluid/ etc), and I've seen gear installs at $1200+. Depends a lot on your location, and the shop itself.

Gear installs are one of those areas, that is worth paying more to a shop with a lot of experience and a great reputation....than to save a few bucks. A gear install is not complicated, but it is very precise, and should be performed by someone that has done many and is reputable. I would also ask a shop how many Jeep JK's they have done.....(piece of mind knowing that your JK is not a guinea pig- lol).

Whether or not it is worth doing is up to you. If you think your JK feels as if it has lost a lot of performance since upgrading tires (on-road/ off-road/ acceleration/ mpg's/ etc), than you might want to look into it, but if you think it feels okay- then don't worry about it.

If you don't have 33's yet- you might want to do them first, and see how it feels with the stock gearing. Some will feel okay with that set-up....others will not.
Man did you see the detail in that answer???

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