Just found out I have 3.07's

[jpaj88]

I got my build sheet for my jeep from jeep.com. I got the D35 with 3.07. It surprised me, I really thought I had 3.73's. I want to get a 3 inch lift (probably black diamond, or something around that price range) and 33" BFG mud terrains.

Will it be worth running with this setup? I plan on doing some moderate off-roading and mostly city driving. Or is it what I feared, I will need to re-gear, with what gears, how much am I looking at to re-gear?

 

[noskils32]

Most of the time when you get to 33s you are going to need to re-gear depending on how big of tires you had on when it was stock. I'm not sure how much it will cost.

 

[west747]

The install cost for the new gears will be the m,ost expensive part. i am getting my new gears installed for about 300 Canadian. dont forget to include the price of new bearings and shim kits with the total cost. :lol: you wont wouldnt want to have to go back in the diff to change bearings later.

 

[richsia]

I got my build sheet for my jeep from jeep.com.

How did you go about getting a build sheet?
This would be a big help for me.
Thanks in advance

 

[Bounty__Hunter]

You can run the 33" tires with the 3.07 gears and 5spd, it's livable until you can afford the gear swap. You won't be able to use 5th gear much but for downhill, and passing will have to be well thought out.

Many jeepers run that setup, and I did for years until I swapped in a 350.

Keep your eyes open for used TJ axles with lower gears, either 3.73 or 4.10 will work great. The 3.73 came in 4.0L autos with the 30" tire group and the 2.5L auto. The 4.10 came stock with the 2.5l 5spd. Sometimes it's cheaper and easier to swap the entire axle out than it is to regear.

richsia, you've likely got 3.07 gears if you have a 5spd.

 

[jpaj88]

I got my build sheet for my jeep from jeep.com.

How did you go about getting a build sheet?
This would be a big help for me.
Thanks in advance

I went to "contact us" on the bottom of the main page at jeep.com.

from there I went to "need customer assistance."

Then, "send us an email"

Then you just fill out the page, including your VIN number and put requesting a complete build sheet. They will email you the whole thing. Took about a day to get mine.

-Joe

 

[Bounty__Hunter]

How much detail did the build sheet give you? Can you cut and paste yours into a message here?

 

[Joopin]

If you do regear you have to remember about the carrier sizes. Once you go from a ratio that starts with a 3 (3.xx) to a 4 (4.xx) the carrier size changes. So if you regear from a 3.07 to a 3.73 you can use the same carrier. 3.07 to 4.11 will need a larger carrier. I went from 3.07s to 4.56s and I switched the carrier to a limited slip in back and left it open in the front. Do a search for a tire/ratio chart to get the recomended ratio for 33s. I don't have the link here at work or I would send ya there myself. Good luck.

 

[jpaj88]

Seats - Vinyl High-Back Bucket
Convenience Group
Heavy Duty Electrical Group
Monotone Paint
Sport Decor Group
*** DESCRIPTION NOT AVAILABLE ***
Alternator - 117 Amp
Battery - 600 Amp Maintenance Free
Brakes - Power Front Disc/Rear Drum
Seats - High Back Bucket
Seats - Reclining Front
Seat - Rear Folding
Air Bags - Front, Next Generation**
Carpet - Front Seat Area
Carpet- Rear Seat/Wheelhouse/Cargo
Cargo Net
Cargo Tie Down Loops
Console - Full Length Floor
Transmissions - All Manual
Transmission - 5-Speed Manual
Command-Trac Part Time 4WD System
Axle - Front, Dana 30/186MM
Axle Ratio - 3.07
Axle - Rear, Dana M35/194MM
All Engines
Engine - 4.0L Power Tech I-6
Windshield Glass - Tinted
Glass - Front Door Tinted
Door - Full Metal w/Roll-up Windows
Glass - Tinted Rr Drs/Qtr/Liftgate
Defroster - Rear Window
Mirror - Left Manual
Mirror - Right Manual
Mirrors - Swing-Away
All Vehicles W/O Power Mirrors
Heater -w/Instrument Pnl Ventilation
Instrument Cluster w/Tach
Speedometer - 100 MPH Primary
Windshield Wipers - Var Intermittent
Wiper/Washer - Rear Window
Horns - Electric, Dual Note
Power Outlet - Auxiliary 12V
Glove Box - Locking
Warning Lamp - Shift Indicato
Lamps - Courtesy
Lamps - Map/Dome Reading
Lamp - Underhood
Headlamps - Halogen
Fog Lamps
Lamp - Center Hi-Mount Stop
Bumper - Front Painted
Bumper - Rear Black
Bumper Extensions
Headlamp Bezels - Chrome
Front Frame Overlay - Black
Grille - Body Color
Side Steps - Bodyside
Sport Bar - Side w/Padding
Emissions - Federal
EVAP Control System
Fuel Tank - 19 Gallon w/Tethered Cap
Flame Red Clear Coat
Flame Red Clear Coat
All Radio Equipped Vehicles
Radio - AM/FM
Speakers - Four
Antenna - Fixed
Steering - Power Rack and Pinion
Steering Wheel - 2-Spoke Soft Feel
Suspension - Normal Duty
Stabilizer Bar - Front
Stabilizer Bar - Front and Rear
Steering Column - Tilt
Spare Tire - Full Size
Tire Carrier - Outside
Tires - P215/75R15 RBL Wrangler AT
Goodyear Brand Tires
Black Hard Top
Wheels - 15 x 7.0 Full-Face Steel
Wheels - Steel
Upgraded OBD-II Connectors
Skid Plate Shield - Fuel Tank
Skid Plate Shield - Transfer Case
Tethered Fuel Filler Cap
Build To U S Market Specifications
8 Additional Gallons Of Gas
Spring - Left Front
Spring - Left Rear
Spring - Right Front
Spring - Right Rear
GVW/Payload Rating

 

[flip124]

Wow they are quick with their customer service. No more than 10 minutes after I requested the build sheet, there it was. Its got some useful info.

Heres what i got from em.

Thank you for the recent e-mail regarding your 1998 Jeep Wrangler.

Here is the list of equipment provided from the factory:

K5T6 Seats - Cloth High-Back Bucket
ADC Convenience Group
ALAP SE Decor Group
APAS Monotone Paint
A18P 2.5L Engine(EPE)/5Sp Man Trans(DDQ)
BAHS Alternator - 81 Amp
BCDS Battery - 500 Amp Maintenance Free
BGAS Brakes - Power Front Disc/Rear Drum
CADP Seats - High Back Bucket
CAGP Seat - Easy Access,Pass Tip & Slide
CDBS Seats - Reclining Front
CFMP Seat - Rear Folding
CGWS Air Bags - Front, Next Generation**
CKES Carpet - Front Seat Area
CKFP Carpet- Rear Seat/Wheelhouse/Cargo
CKRP Cargo Net
CKTS Cargo Tie Down Loops
CLC Floor Mats - Front
CLSP Sport Bar - Rear w/Padding
CUFP Console - Full Length Floor
DBBC Transmissions - All Manual
DDQ Transmission - 5-Speed Manual
DHNS Command-Trac Part Time 4WD System
DJJS Axle - Front, Dana 30/186MM
DMFP Axle Ratio - 4.10
DRJS Axle - Rear, Dana M35/194MM
EAAC All Engines
EPE Engine - 2.5L Power Tech I-4
GBBS Windshield Glass - Tinted
GCBP Glass - Front Door Tinted
GCF Door - Full Metal w/Roll-up Windows
GRVP Mirror - Left Manual
GSVP Mirror - Right Manual
GTVS Mirrors - Swing-Away
GVAC All Vehicles W/O Power Mirrors
HCDS Heater -w/Instrument Pnl Ventilation
JAYS Instrument Cluster w/Tach
JCDS Speedometer - 100 MPH Primary
JHAP Windshield Wipers - Var Intermittent
JJBS Horns - Electric, Dual Note
JJJS Power Outlet - Auxiliary 12V
JKAS Glove Box - Locking
KWPS STRIPE/BADGE/MOLDING/COLOR
KXPS STRIPE/BADGE/MOLDING/COLOR
K3ZP STRIPE/BADGE/MOLDING/COLOR
LAPP Warning Lamp - Shift Indicator
LBBP Lamps - Courtesy
LDAP Lamp - Underhood
LMAS Headlamps - Halogen
LPSS Lamp - Center Hi-Mount Stop
MBAS Bumper - Front Painted
MB5S Bumper - Rear Black
MCHS Bumper Extensions
MFPS Headlamp Bezels - Chrome
MFRS Front Frame Overlay - Black
MFTS Grille - Body Color
MRJ Side Steps - Bodyside
MWBS Sport Bar - Side w/Padding
NAA Emissions - Federal
NBKS EVAP Control System
NFSP Fuel Tank - 15 Gallon w/Tethered Cap
NHM Speed Control
PCNA Deep Amethyst Pearl Coat
QCNS Deep Amethyst Pearl Coat
RAAC All Radio Equipped Vehicles
RAS Radio - AM/FM Cassette
RCDP Speakers - Four
RDDP Antenna - Fixed
SBAS Steering - Power Rack and Pinion
SCGP Steering Wheel - Leather Wrapped
SDAP Suspension - Normal Duty
SHAS Stabilizer Bar - Front
SHCS Stabilizer Bar - Front and Rear
SUA Steering Column - Tilt
TBBP Spare Tire - Full Size
TBRS Tire Carrier - Outside
TMW Tires - P215/75R15 OWL All Terrain
TZAS Goodyear Brand Tires
VJUA Spice Soft Top
WJH Wheels - Aluminum
WKBP Wheel - Matching Spare
WLZC Wheels - All Aluminum
XCYS Upgraded OBD-II Connectors
XEES Skid Plate Shield - Fuel Tank
XEFS Skid Plate Shield - Transfer Case
XJFS Tethered Fuel Filler Cap
YAAS Build To U S Market Specifications
YEP Manuf Statement of Origin
YGFA 8 Additional Gallons Of Gas
ZAUP Spring - Left Rear
ZBEP Spring - Left Front
ZNUP Spring - Right Rear
ZPEP Spring - Right Front
Z5BS Payload Rating - 1800#
1AAS U.S. Dealer Retail
151S Zone 51-Chicago
2TNA Customer Preferred Package 2TN
23N Customer Preferred Package 23N
3V3A Customer Preferred Discount
4HA Special Scheduling Condition I
4XA Air Conditioning Bypass
6Z5 Paint Order Code
616S Iowa State Code
916S Iowa State Code

 

[jeepin916]

hmmmm inteesting i didnt know u could get it on there site, i got mine months ago at the dealer.. i went in there with my VIN and they gave me a print out....

 

[jeeperjoe]

does anyone know if i can get one for an AMC jeep??

 

[Joopin]

Hey jpaj88, here is that link I was talking about... hope this helps. http://www.off-road.com/toyota/taco/tech/axle/gearchart.html

 

[jpaj88]

Looks like even 3.73 gears wouldnt be optimal for running 33"'s according to that chart.

 

[Bounty__Hunter]

Not all charts are accurate, as they don't take into account engine size and keeping different engines operating in their optimal RPM range. Same reason why I-6 and I-4 engines come factory with different gear ratios.

Best method is to figure the percentage of tire change, like increasing size my 15%. You then want to regear lower by 15%, or the same percentage you changed your tire height by.

Regear a little lower than your calculation to compensate for the added weight of the larger tires and to get a better lower crawl ratio.

I think 3.73 or 4.10 would be a good change with 33" tires with the I-6 and 5spd, when changing from 3.07 gears.

As for diff carrier sizes as mentioned above, the D30 and D35 break at different ratios. So upgrading to 3.55 would require a new D35 carrier but not the D30. Upgrading to 3.73 or lower would require new carriers for both diffs.
D30 3.54 & down / 3.73 & up
D35 3.31 & down / 3.55 & up

 

[jpaj88]

Recalls on my 90 YJ

Thanks for the info. Maybe Ill stick with the 3.07's for a while and if I cant take it, Ill do the switch to 3.73's. Anyone have any ideas how much it would cost a shop to switch me to 3.73 from 3.07?

-Joe

 

[hi_c]

Probably close to a grand. Figure $200 per axle for parts I've heard it's $600 for labor. Go to a junk yard... find a 4-banger and steal the axles from under it. Then you'll have 4.10s.... the same as a Rubicon. Maybe you can even make a deal with the JunkYard operator... you'll give him your old axles back, for some of your money back. I really believe this is your best option.

C