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Old 01-26-2012, 09:23 AM   #1
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This sound about right? Gears price

May not do it yet, but figured I would ask while I emailed them on a product they had.


Your gear ratio will depend on the tire size that you decide to go with as well as your transmission (automatic vs manual). The rate will not change unless you add lockers or something of that nature $1650 installed. That price does include the 500 mile service required after the gears have seasoned. We only use the best ring and pinion plus install kits, Yukon unless the customer request something different. You would need to purchase the AEV Procal to program the computer to the new gear ratio ($150) or the Jeep goes into limp mode.

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Old 01-26-2012, 09:40 AM   #2
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Sounds about right and you will need the AEV procal. Yukon makes very good gears I've heard. I was not sure that AEV could address this yet with the 12s? Someone else should chime in soon.

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Old 01-26-2012, 10:21 AM   #3
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Sounds close to what I was quoted when I checked locally. They never specified what brand gears. Are you changing gears to up your tire size? I thought about going up in tire size to 35's, but some good advise from folks here on the forum persuaded me to shelve the vanity of 35 inch tires keep my 33's and invest the almost 2 grand more wisely in other upgrades. No Rubicon trails here in Florida.
Did they change the gearing in the 2012's? I believe I saw 3.21 on a 2012 invoice?? My 09 I think is 3.73.
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Old 01-26-2012, 10:34 AM   #4
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Quote:
Originally Posted by damndirtyog View Post
Sounds close to what I was quoted when I checked locally. They never specified what brand gears. Are you changing gears to up your tire size? I thought about going up in tire size to 35's, but some good advise from folks here on the forum persuaded me to shelve the vanity of 35 inch tires keep my 33's and invest the almost 2 grand more wisely in other upgrades. No Rubicon trails here in Florida.
Did they change the gearing in the 2012's? I believe I saw 3.21 on a 2012 invoice?? My 09 I think is 3.73.

Thanks Esp.

Dirty, I have the 3.21 Auto, currently running 33's however (Upgraded the stock sport steels to Hulks at the dealer)... I am getting pretty horrid mileage for a stock Jeep. I have a lot of things racking up in the house that will be installed in February, I could only imagine it will get worse. I asked about the gearing here locally. I figured it would alleviate some of the mileage woes. I am getting about 13 mpg, city/hwy combined, with a light foot. I know I didn't buy this for mileage, but if there are 4 doors with lifts getting better than 2 door, no lift, something is up, I can only imagine gears.
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Old 01-26-2012, 10:48 AM   #5
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i got prices from 1100 to 2900 locally. think i am going with a shop that said 1500
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Old 01-26-2012, 11:53 AM   #6
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Quote:
Originally Posted by New2012JEEP View Post
May not do it yet, but figured I would ask while I emailed them on a product they had.


Your gear ratio will depend on the tire size that you decide to go with as well as your transmission (automatic vs manual). The rate will not change unless you add lockers or something of that nature $1650 installed. That price does include the 500 mile service required after the gears have seasoned. We only use the best ring and pinion plus install kits, Yukon unless the customer request something different. You would need to purchase the AEV Procal to program the computer to the new gear ratio ($150) or the Jeep goes into limp mode.
Quote:
Originally Posted by ESP View Post
Sounds about right and you will need the AEV procal. Yukon makes very good gears I've heard. I was not sure that AEV could address this yet with the 12s? Someone else should chime in soon.
That was one of the upgrades that AEV supposedly made on the newest version of the Procal. Numerous peeps on JKF (and I assume here, as well) have used it to avoid limp mode.
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Old 01-26-2012, 08:59 PM   #7
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Originally Posted by New2012JEEP View Post
Thanks Esp.

Dirty, I have the 3.21 Auto, currently running 33's however (Upgraded the stock sport steels to Hulks at the dealer)... I am getting pretty horrid mileage for a stock Jeep. I have a lot of things racking up in the house that will be installed in February, I could only imagine it will get worse. I asked about the gearing here locally. I figured it would alleviate some of the mileage woes. I am getting about 13 mpg, city/hwy combined, with a light foot. I know I didn't buy this for mileage, but if there are 4 doors with lifts getting better than 2 door, no lift, something is up, I can only imagine gears.
I'm not much of a gear guru, but changing your gearing to say a 4.11 or 4.88 and still running your 33's will probably reduce your mileage even more because I believe your rpms will be higher. You'll get more power though. I started out getting 16 mpg out of the dealership parking lot, and now with some of the modifications and added weight of offroad accessories I'm down to about 14. But like you said, We don't buy Wranglers for the mileage. Good luck.
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Old 01-26-2012, 09:21 PM   #8
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Quote:
Originally Posted by New2012JEEP View Post
Thanks Esp.

Dirty, I have the 3.21 Auto, currently running 33's however (Upgraded the stock sport steels to Hulks at the dealer)... I am getting pretty horrid mileage for a stock Jeep. I have a lot of things racking up in the house that will be installed in February, I could only imagine it will get worse. I asked about the gearing here locally. I figured it would alleviate some of the mileage woes. I am getting about 13 mpg, city/hwy combined, with a light foot. I know I didn't buy this for mileage, but if there are 4 doors with lifts getting better than 2 door, no lift, something is up, I can only imagine gears.
If you have an auto 12 then you've got 3.73.
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Old 01-26-2012, 09:27 PM   #9
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Unless this is wrong...I wouldn't mind an error there.


Thank you for contacting the Jeep Customer Assistance Center in regards
to your 2012 Jeep Wrangler X 4X4 SPORT UTILITY 2-DOOR

We are pleased to provide vehicle build information per your request.

According to our records, your vehicle was equipped from the factory
with the following:

*A7 Cloth Low-Back Bucket Seats
-X9 Black
AAJ Connectivity Group
AHT Trailer Tow Group
APAS Monotone Paint
BABS 160 Amp Alternator
BC2S 600 Amp Maintenance Free Battery
BNBS Electronic Stability Control
BNGS Hill Start Assist
BNHP Hill Descent Control
BNMP Traction Control
BNSP Electronic Roll Mitigation
BNTP Trailer Sway Damping
BPTP Hydraulic Assist Brake Booster
BRWS 4-Wheel Disc Brakes
CACS Low Back Bucket Seats
CAGS Easy Access Passenger Seat
CDBS Reclining Front Seats
CDHP Driver Height Adjuster Seat
CFMS Rear Folding Seat
CGXS RR Head Restraints Outboard Seating
CG3S Advanced Multistage Front Air Bags**
CKES Front Seat Area Carpet
CKFP Rear Seat/Wheelhouse/Cargo Carpet
CKLS Cargo Compartment Floor Mat
CKTS Cargo Tie Down Loops
CLCS Front Floor Mats
CLMS Sport Bar w/Full Padding
CSMP Front Seat Back Map Pockets
CUFS Full Length Floor Console
CURS Rear Compartment Storage Tray
CUYS Storage Tray
CVCP Chrome/Leather Wrapped Shift Knob
DBAC All Automatic Transmissions
DGJ 5-Speed Auto W5A580 Transmission
DHES Man Shift-on-the-Fly Transfer Case
DJRS Next Gen. Dana 30 Solid Front Axle
DMCS 3.21 Rear Axle Ratio
DRZS Next Gen. Dana 44 HD Rear Axle

DS7S Conventional Differential Frt Axle
DS8S Conventional Differential Rear Axle
ERB 3.6L V6 24V VVT Engine
GBBS Tinted Windshield Glass
GCBS Front Door Tinted Glass
GCFS Full Metal Doors w/Roll-up Windows
GNAS Rear View Day/Night Mirror
GNUS Sliding Sun Visors w/Mirrors
GTPS Manual Mirrors, Fold-Away
GWKP Sunrider Soft Top
GXXS Sentry Key Theft Deterrent System
HAA Air Conditioning
JA2S Instrument Cluster w/Tach
JCDS 100 MPH Primary Speedometer
JE8S Manual Door Locks
JFJS Temperature & Compass Gauge
JF8S Manual Windows
JHAS Var Intermittent Windshield Wipers
JJFS Single Low Note Horn
JJJS 12V Auxiliary Power Outlet
JKAS Locking Glove Box
LABS Tire Pressure Monitoring Warning LP
LAXS Front Passenger Seat Belt Alert
LAZP Vehicle Information Center
LCLS Front Dome w/On/Off Switch Lamp
LMAS Halogen Headlamps
LNJS Fog Lamps
LPSS CHMSL Lamp
MBAS Painted Front Bumper
MB5S Black Rear Bumper
MFRS Black Front Frame Overlay
MFTS Body Color Grille
MG1S Wrangler Badge
MT2S Trail Rated Badge
MUGS Accent Color Fender Flares
MVCS Jeep Badge
MVJS Sport Badge
MX4S Black Sunrider Soft Top
NAS 50 State Emissions
NF2S 18.5 Gallon Fuel Tank
NHAP Engine Oil Cooler
NHMS Speed Control
PX8 Black Clear Coat
QX8S Black Clear Coat
RCGS 6 Speakers
RDDS Fixed Long Mast Antenna
RDZS Steering Wheel Mounted Audio Ctrls
RESS Media Center 130 CD/MP3
RSC SIRIUS Satellite Radio
RSPP Uconnect Voice Command w/Bluetooth
RSUP Audio Jack Input for Mobile Devices
RSXP Remote USB Port
SBAS Power Rack and Pinion Steering
SCVP Leather Wrapped Steering Wheel
SDAS Normal Duty Suspension
SHAS Front Stabilizer Bar
SHCS Front and Rear Stabilizer Bars
SUAS Tilt Steering Column
TBBS Full Size Spare Tire
TBRS Outside Tire Carrier
TRMS P225/75R16 BSW On/Off Road Tires
TZAP Goodyear Brand Tires
WKBP Matching Spare Wheel
WLCS 16X7.0 Lux Styled Steel Wheels
WLYC All Steel Wheels
XBNP Tip Start
XEES Fuel Tank Skid Plate Shield
XEFS Transfer Case Skid Plate Shield
XEWS 2 Front & 1 Rear Tow Hooks
XFUP Trailer Tow w/4-Pin Connector Wiring
XJFS Tethered Fuel Filler Cap
XJGS Non Locking Fuel Filler Cap
XLNS English/USA Language
XPFS Protective Coating and Remover
XSBS Base Interior Accents
X8ZS Seat Parts Module
X81S Instrument Panel Parts Module
X83S Front End Parts Module
X86S Complete Chassis Parts Module
X88S Tire & Wheel Parts Module
X9AP For More Info, Call 888-539-7474
X9BP 1-Year SIRIUS Radio Service
X92S Complete Body in White Parts Module
X94S Complete Painted Body Module
YAAS Build To U.S. Mkt. Specifications

Thanks again for your email.

Sincerely,

Sabrina

Customer Service Representative
Jeep Customer Assistance Center
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Old 01-26-2012, 09:39 PM   #10
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I was under the impression that auto 12s (sports) were only available with 3.73 but after reading this and building one on jeep.com, it is an option.

Good to know-
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Old 01-26-2012, 09:46 PM   #11
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silly automatics make everything so complicated :P
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Old 01-26-2012, 09:54 PM   #12
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I'm rocking a manual tranny with the legendary 3.21s and 33s. Next step is a re gear to 4.88s and 35s in oh.....about......2 1/2 years.
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Old 01-27-2012, 04:31 PM   #13
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I would think for Chrysler changing to a 3.21 would increase the MPG and look more attractive for buyers. But I bet even a slight change of tire height, say to 33" would make a noticeable difference, specifically shifting in and out of overdrive. Although not a problem if you have the luxury of not having to use your 2012 JK as your DD.

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