mekanic71

Hey there, I have a question for y'all. My brother-in-law brought me his jeep to swap rear ends, he also got me the other diff. My question is "on a '01 Cherokee Sport 4.0L with a Dana35, would a Chrysler 8.25 have the same gear ratio or will there be issue's between front and rear." I'm doing this for next to nothing so I don't want it to bite me in the a*# later on. Thanks

apac020

It depends.

If an xj has a 5-speed manual, it probably has 3.07 gears.
If an xj has an auto tranny, it probably has 3.54 gears.
If an xj has an auto tranny and a tow package, it probably has 3.73 gears.

Compare your jeep to the donor, and make sure they match up, and the ratio will probably be the same, but you won't know for sure unless you pull the covers on both and compare the ratio stamped on the ring gear.

mekanic71

Ok. Thanks, I know its an automatic and I think it has a tow package. If I run into issues I'll be yelling for help, LoL. Thanks a bunch

scottmphoto

There "should" be a small metal tag under one of the bolts that hold on the diff cover. If it is there, it'll tell you the ratio.

Michael952

Most XJs with the towing package have the 3.55 gears, especially the newer models. I wish mine had 3.73 ha

ckysodkorn_xj

are you sure? because i don't have a towning package and i have 3.55s according to my build sheet i got from jeep.

XJ Cloth Low-back Bucket Seats
-C3 Mist Gray
ADAP Light Group
APAS Monotone Paint
ARTP Classic Decor Group
AWHP Power Equipment Group
A20P 4.0L Engine(ERH)/4Sp Auto Trans(DGS
BAUS 117 Amp Alternator
BCDS 500 Amp Maintenance Free Battery
BGAS Power Front Disc/Rear Drum Brakes
CACP Low Back Bucket Seats
CBWP Highline Door Trim Panel
CDBS Reclining Front Seats
CFMS Rear Folding Seat
CGGS Traveling Inboard Seat Belt Buckle
CGWS Next Generation Front Air Bags**
CKAS Carpets - Floor and Cargo Area
CKNS Cargo Compartment Carpet
CKTS Cargo Tie Down Loops
CKXS Midgate Box Access
CLEP Front & Rear Floor Mats
CSAP Spare Tire Cover
CSC Cargo Compartment Cover
CSRS Passenger Assist Handles
CSSS Illuminated Rear Assist Handles
CUFS Full Length Floor Console
DGB All 4-Speed Automatic Transmissions
DGSS 4-Speed Automatic AW4 Transmission
DHAP Lock-Up Torque Converter
DHNS Command-Trac Part Time 4WD System
DHSP Floor Mount Automatic Shift Lever
DJHS 230MM Front Axle
DMDP 3.55 Rear Axle Ratio
DRAS Corporate 8.25 Rear Axle
EAAC All Engines
ERH 4.0L I6 Power Tech Engine
GAL Deep Tint Sunscreen Glass
GBBS Tinted Windshield Glass
GCBS Front Door Tinted Glass
GEEP Deep Tint Sunscreen Liftgate Glass
GFA Rear Window Defroster
GNAS Rear View Day/Night Mirror
GNCP Sun Visors w/Illum Vanity Mirrors
GTZP Manual Remote Mirrors
GVBC All Vehicles W/Power Mirrors
GXMP Remote Keyless Entry
HAAP Air Conditioning
HGDS Deluxe Insulation Group
JAYP Instrument Cluster w/Tach
JBFP Instrument Panel Black Bezel
JCDS 100 MPH Primary Speedometer
JHAS Var Intermittent Windshield Wipers
JHBP Rear Window Wiper/Washer
JJAS Cigar Lighter
JJBS Dual Note Electric Horns
JJJS 12V Auxiliary Power Outlet
JPAP Power Windows
JPBP Power Locks
LAJS Headlamps On Warning Chimes
LBBP Courtesy Lamps
LBCS Glove Box Lamp
LCDP Map/Dome Reading Lamps
LDAP Underhood Lamp
LDBP Cargo Compartment Lamp
LHDP Headlamp Off Time Delay
LMAS Halogen Headlamps
LNJ Fog Lamps
LPSS CHMSL Lamp
MBPP Body Color Front Bumper
MBQP Body Color Rear Bumper w/Step Pads
MCAS Rear Body Color Applique
MDA Front License Plate Bracket
MFKP Body Color Grille
MHAS Black Windshield Moldings
MMCS Rear Qtr Solid Window Insert
MMGS Belt Moldings
MMKS Hi Black Gloss/Black Mirror Molding
MNAS Black Door Handles
MWGP Roof Rack
NAA Federal Emissions
NBKS EVAP Control System
NFAS 20 Gallon Fuel Tank
NHM Speed Control
PR4 Flame Red Clear Coat
QR4S Flame Red Clear Coat
RAAC All Radio Equipped Vehicles
RASP AM/FM Cassette Radio
RCRP 4 Speakers
RDDP Fixed Long Mast Antenna
SBAS Power Rack and Pinion Steering
SCGP Leather Wrapped Steering Wheel
SDAS Normal Duty Suspension
SHAS Front Stabilizer Bar
SHCS Front and Rear Stabilizer Bars
SUAP Tilt Steering Column
TBCS Compact Spare Tire
TBLS Inside Mounted Spare Tire
TRLP P225/75R15 Wrangler RT/S AT Tires
TZAP Goodyear Brand Tires
WJ1P 15X7.0 Aluminum 5-Spoke Wheels
WLZC All Aluminum Wheels
XCYS Delete Remote Start System
XJFS Tethered Fuel Filler Cap

apparently i have keyless entry, but i don't.

Michael952

Most newer auto cherokees have 3.55 in general I'm pretty sure

ckysodkorn_xj

to the OP i would look for a tag or pull covers, good idea to replace fluids when you swap anyway, why not.

JakobXJ

i thought it was 3.55 gears not 3.54

salad

3.55 (tomayto) 3.54 (tomahto). Same axle, same ring/pinion tooth count. Someone just rounded differently.

3.73 towing package gears I'm pretty sure ended very early in the 90s if not in the Renix era. You used to be able to get the Fuel Economy gearing as well, which was some wacky ratio to keep RPM down when cruising. Towing package was changed to include AW-4 with cooler, hitch, and possibly upgraded brakes.

Chrysler standardized on 4 gear sets that went with the rest of the drive train:

3.07: 4.0L gas, any TD w/ manual (AX-15, NV3550)
3.55: 4.0L gas, any TD w/ auto (AW-4)
4.10: 2.5L gas w/ manual (AX-5)
4.56: 2.5L gas w/ auto (32RE or some crap)

May differ from what's actually in there though. Only way to be sure is to count teeth.

mekanic71

I just wanted to thank everyone for their help. Everything worked out great other than having to wait an extra day for new U-bolts. THANKS