Jeep Grand Cherokee
WK2 8-speed, 2014–21
Factory gearing, tires, angles and brakes for the Grand Cherokee, and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.
Tire upgrades, worked out
Laredo 3.6 V6 Quadra-Trac II, 3.45s, from P245/70R17| Tire | Height | Under the diffs | Speedo at 65 | RPM at 65 | Gears for daily | Open |
|---|---|---|---|---|---|---|
| 265/70R17 | 31.6 in | +0.6 in | 63 mph | 1,598 | Keep 3.45s | Open → |
| 285/70R17 | 32.7 in | +1.1 in | 61 mph | 1,544 | 3.73 | Open → |
| 33x10.50R17 | 33.0 in | +1.2 in | 60 mph | 1,530 | 3.73 | Open → |
| 33x12.50R17 | 33.0 in | +1.2 in | 60 mph | 1,530 | 3.73 | Open → |
| 255/80R17 | 33.1 in | +1.3 in | 60 mph | 1,527 | 3.73 | Open → |
| 285/75R17 | 33.8 in | +1.7 in | 59 mph | 1,493 | 3.91 | Open → |
| 315/70R17 | 34.4 in | +1.9 in | 58 mph | 1,470 | 3.91 | Open → |
| 35x11.50R17 | 35.0 in | +2.2 in | 57 mph | 1,443 | 3.91 | Open → |
| 35x12.50R17 | 35.0 in | +2.2 in | 57 mph | 1,443 | 3.91 | Open → |
| 37x11.50R17 | 37.0 in | +3.2 in | 54 mph | 1,365 | 4.3 | Open → |
| 37x12.50R17 | 37.0 in | +3.2 in | 54 mph | 1,365 | 4.3 | Open → |
Stock turns 1,656 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.
Trims
4 we have figures for| Trim | Tire | Transmission | Axle | Angles | Clearance | Open |
|---|---|---|---|---|---|---|
| Laredo 3.6 V6 Quadra-Trac II | P245/70R17 | TorqueFlite 8-speed automatic | 3.45 | 26.2 · 19 · 24 | 8.6 in | Use → |
| Limited 3.6 / 5.7 / 3.0 EcoDiesel, standard suspension | 265/60R18 | TorqueFlite 8-speed automatic | 3.09 / 3.45 | 26.2 · 19 · 24 | 8.6 in | Use → |
| Overland / Summit, Quadra-Lift air (Off-Road 2) | 265/50R20 | TorqueFlite 8-speed automatic | 3.09 / 3.45 | 36.1 · 22.8 · 27.1 | 10.8 in | Use → |
| Trailhawk (2017-21), Quadra-Drive II + air | 265/60R18 | TorqueFlite 8-speed automatic | 3.09 / 3.45 | 36.1 · 22.8 · 27.1 | 10.8 in | Use → |
Size
- Wheelbase
- 114.8 in
- Front overhang
- 35.2 in
- Rear overhang
- 40.2 in
- Height
- 69 in
- Body
- SUV
- Stock tires
- 265/50R20, 265/60R18, P245/70R17
Transmissions and low range
- TorqueFlite 8-speed automatic (845RE / 8HP70)
- 4.71 · 3.14 · 2.11 · 1.67 · 1.29 · 1 · 0.84 · 0.67
- Low range, mp3022 quadra-trac ii
- 2.72:1
- Low range, mp3022 quadra-drive ii
- 2.72:1
Axles
- Front
- 195 mm (7.7 in) IFS front
- Rear
- IRS: 195 mm (7.7 in) V6 4x4 open, 230 mm (9.1 in) V8 / EcoDiesel / eLSD
- 3.09 ratio
- Limited 3.6 / 5.7 / 3.0 EcoDiesel, standard suspension, Overland / Summit, Quadra-Lift air (Off-Road 2), Trailhawk (2017-21), Quadra-Drive II + air
- 3.45 ratio
- Laredo 3.6 V6 Quadra-Trac II, Limited 3.6 / 5.7 / 3.0 EcoDiesel, standard suspension, Overland / Summit, Quadra-Lift air (Off-Road 2), Trailhawk (2017-21), Quadra-Drive II + air
Brakes
- Front rotor
- 12.99 in, 330 mm
- Front caliper piston
- 48.0 mm
- Rear rotor
- 12.99 in, 330 mm
- Rear
- disc (solid, 330 x 14 mm)
Suspension
- Front
- double wishbone IFS, coil or air
- Rear
- independent multi-link, coil springs or Quadra-Lift air
- Rear layout
- Independent
Fuel economy
- EPA highway
- 25 mpg
- Rated years
- 2014–2021, 4WD
Brake upgrades
What bigger tires need →- SRT8 Brembo front brake swap (Mopar SRT calipers + 380 mm rotors)+18% brake torque13.0 → 15.0 in rotor · 6-piston · 20 in wheels or bigger · $1,432Mopar SRT8 front caliper pair only at JustForJeeps; rotors, pads, pins, hoses and backing plates extra. Not for WL / WL-L.
Aftermarket bumpers
4 listedMakers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it on the rig page and every owner of this Grand Cherokee sees how it does on their tires and lift.
Front 4
- ARB Deluxe Winch Front Bumper$2,040 · winch ready
- ARB Deluxe Winch Front Bumper with Bull Bar$2,596 · winch ready
- Chief Products Off-Road Front Bumper (cp-wk2-orfb)62.8 lb · $699
- Offroad Animal Pre-Runner Steel Front Bumper (Grand Cherokee WK2 2017-2021)53 lb
Rear
None listed yet.
Every calculator, set up for the Grand Cherokee
Source: media.stellantisnorthamerica.com. No common aftermarket ring and pinion sets for the WK2 IRS/IFS units; gearing changes are usually OEM ratio swaps (3.45 to 3.70).
Use at your own risk. These calculators are here to help you plan and to inform your decisions, not to sign off on a build. Many numbers are estimates worked out from factory figures, and some factory figures are not yet confirmed. Check every number against your own truck, its manuals and a qualified shop before you buy parts, cut, weld, lift, regear or drive on it. Long Range Desert Tools is not liable for anything you do based on these calculators or their results. The full terms are in our policies.