Dodge / Ram
Main 2014 Jeep Cherokee page (with off-road specifications)
The 2014 Jeep Cherokee uses electrically power-assisted steering, with computer control — as most new cars do.
Either engine is equipped with a 160 amp alternator and 600 amp battery (180 amp alternator and 730 amp batteries are optional). The front suspension uses McPherson struts with long-travel coil springs, mounted in a one-piece aluminum sub-frame, with aluminum lower control arms and a standard stabilizer bar. Cherokee uses a four-link rear suspension with trailing arm, aluminum lateral links, isolated high-strength steel rear cradle, coil springs, and a stabilizer bar.
The load floor is 30.9 inches high, the sill step is 18 inches high. The gas tank holds 60 liters (15.9 gallons).
The 2014 Cherokee provides more room for passengers, with less cargo space. It is more flexible in the seating / cargo arrangements than the XJ Cherokee, quicker, quieter, and far more efficient, but less capable off-road. (We are using the 1997 version of the XJ because we have relatively complete specifications.)
* Curb weight is calculated in pounds (kg) with two passengers and all required fluids.
The nine-speed automatic has a 9.79 ratio spread, with a first gear of 4.70 and a 9th of 0.48; the axle ratios are 3.251 (V6), 3.517 (AWD with towing), 3.734 (2.4 engine), and 4.048 (2.4 AWD wtih towing). The low range ratio is 2.92:1 on AWD systems. Clearance at the front axle is 10.4 inches with the two-speed PTU; 9.7 inches at the locking two-speed rear differential.
We will be updating this soon, but in the meantime, this was written before the official launch.
The Cherokee system for four-wheel grip includes AWD, locked 4WD-high, locked 4WD-low, and a rear disconnect with sliding fork engagement (it is built by AAM, according to Automotive News). Bob Sheaves wrote that the patent applications showed it to be similar to the New Venture 242 transfer case, with a 90-degree output to the rear axle. The front-axle differential is separate from the transmission (but possibly inside the transaxle housing), with the bolt on the power takeoff (PTO) box along a split line (near #30 on the following diagram), separating it from the main housing. Not shown on the diagram, because it is a “flattened view,” are the two front halfshafts, which are splined to the front-differential side gears. Note: Chrysler refers to the PTO and associated gearing as a PTU, or Power Transfer Unit.
To the left of #30 on the diagram, everything would be common, enclosed components with the 2WD transaxle and case. To the right of #30, everything is enclosed in the PTO housing.
The diagram shows why a special gear reduction is needed, and why there is no need for a neutral position in the PTO housing, which is only used to disconnect the drive line (to use the PTO). The planetary gearset provides the main reduction. Locking the ring gear to the sun gear gives a 1:1 ratio to both differentials. Locking the rear gear or planetary gears so they’re stationary gives a reduction ratio.
Mr. Sheaves pointed out, “With the range select ahead of the AWD differential, the differential can be smaller, lighter, and less expensive than if placed downstream from the splitter. The faster you spin the interaxle propshaft, due to multiple reduction stages, ... the more vibration you incur due to mismatch of joint angularity caused by movement of the axles (since they do not move up and down and are rubber mounted to the body) relative to each other, forcing the need of a multiple jointed propshaft with additional carrier bearings to shorten the span and stay below each individual shaft's critical speed. ... You don't design a component without considering the effect on the system.
“One thing missing from both designs is a torque proportioning differential in both axles and between the axles in the transfer gearing. It can be done, but not in the shown differential housings or PTO. This would be more important to provide a biased system, as you want in high performance cars.”
The 2014 Jeep Cherokee is loaded with safety systems, including ten standard airbags and Chrysler’s own lane-change and rear cross path alerts. New features are a parking assistance system, a new adaptive cruise control, a new lane departure warning, and a new forward collision warning system.
Standard and optional features include:
Also see: Pentastar V6 • Hemi V8 • Nine-speed automatic • 2014 Jeep Cherokee • XJ Jeep Cherokee
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