regearing the factory rubicon Dana 44 axles to 4.88 or 5.13.
todo: regear
http://www.grimmjeeper.com/gears.html
Something I’ve realized on Grimmjeeper, is that the OD gear for the nv3550 is not accurate. GJ lists it as .73, while everywhere else says .78
33" (Cooper Evolution 285/75r16 633 revs/mile)
NV3550/31.86"/4.10=2529rpm @ 75mph
NV3550/31.86"/4.56=2813rpm @ 75mph
NV3550/31.86"/4.88=3011rpm @ 75mph
NV3550/31.86"/5.13=3165rpm @ 75mph
35" (MT Baja Boss 315/75r16 602 revs/miles)
NV3550/33.50"/4.10=2406rpm @ 75mph
NV3550/33.50"/4.56=2676rpm @ 75mph
NV3550/33.50"/4.88=2863rpm @ 75mph
NV3550/33.50"/5.13=3010rpm @ 75mph
NV3550/33.50"/5.38=3157rpm @ 75mph
33" (via jjvw 285/75r16 Cooper ST Maxx)
NV3550/32"/4.56=2801rpm @ 75mph
NV3550/32"/4.88=2998rpm @ 75mph
NV3550/32"/5.13=3151rpm @ 75mph
NV3550/32"/5.38=3305rpm @ 75mph
35" (GY MTR 35x12.50r15)
NV3550/33.875"/4.56=2647rpm @75mph
NV3550/33.875"/4.88=2833rpm @75mph
NV3550/33.875"/5.13=2978rpm @75mph
NV3550/33.875"/5.38=3123rpm @75mph
Factory @70
42rle / 29.5" /3.73 = 2052rpm @ 70mph
NV3550/29.5"/3.73 = 2320rpm @ 70mph
AX-15 / 29.5" /3.73 = 2349rpm @ 70mph
NSG370/29.5"/3.73 = 2498rpm @ 70mph
32rh / 29.5" / 3.73 = 2974rpm @ 70mph
Factory @75
32rh/29.5"/3.73=3186rpm @ 75mph
32rh with 33s
32rh/32"/3.73=2937rpm @ 75mph
32rh/32"/4.10=3229rpm @ 75mph
42rle with 35s
42rle/33.875"/5.13=2633rpm @ 75mph
42rle/33.875"/5.38=2762rpm @ 75mph
42rle/33.875"/5.89=3023rpm @ 75mph - And with 5.89, were that possible on factory axles.
32rh with 35" MTR
32rh/33.875"/3.07=2284rpm @75mph
32rh/33.875"/3.73=2775rpm @75mph
32rh/33.875"/4.10=3050rpm @75mph
32rh/33.875"/4.56=3392rpm @75mph
Tools needed:
- press for the new bearings
- bearing puller
- dial indicator for the backlash setting
- ½” torque wrench
- an inch-lbs. beam-style ¼” torque wrench for setting the pinion bearing preload.
- Gear marking compound/paint
- bearing race and seal driver set
- micrometer
| tool | $ | link |
|---|---|---|
| Shop Press | $170 | HF 12 Ton Shop Press |
| Clamshell bearing puller | $257 less on amazon | Carrier & Pinion Bearing Puller - JEGS |
| Bearing Separator | $50 | HF Bearing Separator and Puller Set |
| Dial indicator | $18 | HF 1 In. Travel Machinists Dial Indicator |
| Magnetic base | $13 | HF Multi-Position Magnetic Base with Fine Adjustment |
| Dial and base | $41 | McMaster-Carr magnetic dial indicator |
| Gear Marking Compound | $5-10 | Summit gear compound |
| Brass punch | $40 | Amazon OTC brash punch |
| 1/4 beam torque wrench | $30 | Lowes Presa 1/4-in Drive Beam Torque Wrench – Amazon Presa |
| bearing race driver | $45 | HF Bearing Race and Seal Driver Set, 10 Piece |
Gear Supplier:
gearsets
Motive Gears
Motive Gear Jeep TJ Rubicon, 4.88 | Morris 4x4
Motive Gear Jeep Rubicon 4.88 Gears MGK-116 | extreme terrain
Motive Gear Rubicon 4.88 | Quadratec
Revolution gears - Rev-TJ-Rub-488/Rev-TJ-Rub-513
Jeep TJ Rubicon Gears Revolution Gear & Axle
Koyo Rev-TJ-Rub-488-K | eBay
Timken Rev-TJ-Rub-488 | eBay
https://www.amazon.com/Revolution-Gear-Axle-overhaul-carriers/dp/B01ETJQZCY
Revolution Gear & Axle TJ Rubicon | POLY PERFORMANCE
Jeep TJ Rubicon 4.88 Timken | rwkhaus
Jeep TJ Rubicon 4.88 ratio Koyo | King Off Road Parts
Jeep TJ Rubicon 4.88 Timken Rev-TJ-Rub-488 | vividracing
Yukon gears
Yukon Gear Jeep TJ Rubicon, 4.88 ratio | ecgs
Nitro Gears
Nitro Gear set