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-   -   Regearing...Looking for advice (http://www.wranglerforum.com/f274/regearing-looking-for-advice-259773.html)

ResQJK 07-31-2013 11:18 PM

Regearing...Looking for advice
 
I have an '08 X, where can I find on the vehicle what the gear ratio is? I believe it may have 3:21s. I am running 315 MTZs, so what would a more appropriate ratio be? Finally, how difficult is the process of changing out the gears? Thanks in advance for any help you can give me!:confused:

rics1997 07-31-2013 11:35 PM

If you have a manual you can have 3.21 or 3.73. The 3.73 was an upgrade option. If you have a automatic tranny then you have a 3.73.

I have 4.88's in mine and think they work great with my 35's

ResQJK 08-01-2013 09:51 PM

It's a manual. Did you do your own work?

mountainneer 08-01-2013 10:54 PM

If you log on to the Jeep website you can request a "build sheet" with your V.I.N. They will e-mail you the build sheet within a day.

I have a 2010 JKU automatic with 35's. I went with 5.13 gears. Changing the gears takes some tech experience. My advise would be to take it to a trustworthy shop who does gears.

david.w.johnson 08-02-2013 12:34 AM

What were the improvements with the gear change? More power? Pick up from a stop? Pick up at speeds? Mileage?

mountainneer 08-02-2013 10:33 AM

Quote:

Originally Posted by david.w.johnson (Post 4030310)
What were the improvements with the gear change? More power? Pick up from a stop? Pick up at speeds? Mileage?

All of the above...100 percent better drivability.

Daniel_M 08-02-2013 10:57 AM

Re-gear doesn’t give you more power as it has nothing to do with the engine. It does make the driveability 100% better. Lowere RPM, better MPG, less doggy at accel, so on…A 3.8L with manual would benefit from 4.88 gears for 35’s.

-Dan

ResQJK 08-03-2013 07:49 AM

Quote:

Originally Posted by mountainneer (Post 4030111)
If you log on to the Jeep website you can request a "build sheet" with your V.I.N. They will e-mail you the build sheet within a day.


I have a 2010 JKU automatic with 35's. I went with 5.13 gears. Changing the gears takes some tech experience. My advise would be to take it to a trustworthy shop who does gears.

Will do. Thanks!

shrwud96 08-03-2013 08:00 AM

I used www.compnine.com for my build sheet. Worked great and everything was accurate. Click on the Try free demo.

TreyJK 09-10-2013 07:38 AM

I have a 08 auto with 35"s but it's also my daily driver. Would 5.33 gear ratio be too much for toll road speeds?

Nickdoesabodygood 09-10-2013 07:50 AM

I went from an '08 with 3.21 to 4.11. The difference was dramatic, its like a totally different vehicle. RPM's are definitely higher than before but now I can actually use 6th gear on the highway.

Jeep757 09-10-2013 08:49 AM

Quote:

Originally Posted by Nickdoesabodygood (Post 4442377)
I went from an '08 with 3.21 to 4.11. The difference was dramatic, its like a totally different vehicle. RPM's are definitely higher than before but now I can actually use 6th gear on the highway.

How much higher? Auto or manual? I have an 08 with 3.21 gears (manual) on 33's. Considering either 4.10's or 4.56's. I do a mix of highway and stop n go street driving.

Nickdoesabodygood 09-10-2013 09:11 AM

Quote:

Originally Posted by Jeep757 (Post 4443329)
How much higher? Auto or manual? I have an 08 with 3.21 gears (manual) on 33's. Considering either 4.10's or 4.56's. I do a mix of highway and stop n go street driving.

It's a manual. When I drive home today I will take down some RPM numbers at different speeds in all the gears so that you can compare it to yours. I am very happy with the 4.11 gearing and don't think I would go any higher unless I was considering putting on 37"s. Shifting is much different now, I find that i cruise around in a higher gear than I used to and 6th gear isn't completely useless anymore, I love it.

TRAUMAhead 09-10-2013 01:48 PM

Quote:

Originally Posted by TreyJK (Post 4442177)
I have a 08 auto with 35"s but it's also my daily driver. Would 5.33 gear ratio be too much for toll road speeds?

There's no 5.33. Do you mean 5.13 or 5.38?

3.8L, automatic, 35s, 4 door and I was still disappointed when I switched from 4.10s to 5.38s. Streetability didn't improve as much as I hoped, felt like I just got back my overdrive and 4:10 OD off drove better than 5.38 OD on around town.

TreyJK 09-10-2013 11:02 PM

Quote:

Originally Posted by TRAUMAhead (Post 4450289)
There's no 5.33. Do you mean 5.13 or 5.38?

3.8L, automatic, 35s, 4 door and I was still disappointed when I switched from 4.10s to 5.38s. Streetability didn't improve as much as I hoped, felt like I just got back my overdrive and 4:10 OD off drove better than 5.38 OD on around town.

Oh yea ha that's what I meant. With the above stats would I notice a difference from 3.71 to 4.10 or 5.13?

Nickdoesabodygood 09-11-2013 07:36 AM

2 Attachment(s)
Quote:

Originally Posted by Jeep757 (Post 4443329)
How much higher? Auto or manual? I have an 08 with 3.21 gears (manual) on 33's. Considering either 4.10's or 4.56's. I do a mix of highway and stop n go street driving.

Here are the numbers I got last night comparing engine speed to road speed with 4.10 gearing. You should be able to use this to compare to your Jeep with 3.21 axle ratio.


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