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The Toyota 4Runner handles very well for a live-axle truck. We drove various models very quickly down twisting back roads along the Oregon coast and found the 4Runner is easy to drive and the suspension damping is excellent. We could tell it uses a live rear axle rather than an independent rear suspension, but the 4Runner handles better than a Chevy TrailBlazer. Rack-and-pinion steering gives the Toyota 4Runner quick steering response.
On unpaved roads, the 4Runner provides a very smooth ride quality, thanks in part to well-tuned damping and progressive-rate spring bumpers. However, the Toyota 4Runner really comes into its own when it gets gnarly. There's lots of suspension articulation for climbing over boulders and gullies, and a host of technology for handling steep, slippery grades.
The smooth V6 engine that comes standard on all Toyota 4Runner models is so good that we can't see a reason to get the V8 except for towing. The V6 provides responsive performance and a pair of lead-footed automotive journalists never felt lacking. The 4.0-liter V6 is a totally new engine with the latest in Toyota technology, including variable-valve timing with intelligence (VVT-i) and a new linkless electronic throttle control system with intelligence (ETCS-i). The lightweight all-aluminum V6 is rated at 245 horsepower and 283 pounds-feet of torque. Fuel economy has been improved and the V6 4x2 model is expected to get 18/21 mpg city/highway (17/20 for 4x4s). The V6 is paired with an electronically controlled four-speed automatic transmission.
Optional for all models is a 4.7-liter V8 that generates 235 horsepower at 4,800 rpm and 320 pounds-feet of torque. Torque, not horsepower, is the key when pulling trailers and the 4Runner's V8 was designed to provide better low-rpm pulling power without compromising highway fuel economy. It uses a steel block and aluminum head. V8 models weigh about 125 pounds more than V6 4Runners. The V8 is expected to get 17/19 mpg on 4x2 models (16/19 for 4x4s).
The V8 delivers better performance than the V6, but we didn't notice a huge gain. The difference will be noticed primarily after hooking up a trailer. Both engines feature a cranking system that keeps the starter engaged until complete combustion is achieved, freeing the driver from holding the key until the engine turns over. Both engines also feature the aforementioned "drive-by-wire" electronic throttle.
We found the rear-wheel-drive Toyota 4Runner impressively capable off road, but ultimate traction comes from the four-wheel-drive models. For starters, 4WD 4Runners are equipped with a two-speed transfer case, giving the driver a low-range set of gears for creeping over rugged terrain.
V6 4WD 4Runners are equipped with Toyota's Multi-Mode shift-on-the-fly system with a Torsen-type limited-slip center differential. The driver can shift between 2WD, 4WD High, and 4WD Low. The Torsen center differential is open in 2WD mode. It applies a rear bias in four-wheel-drive mode, splitting torque 40/60 front-to-rear in normal driving conditions, providing the driver with a traditional feel and better stability when accelerating. The 4WD mode may be used in all types of driving conditions on all types of roads, from dry pavement to wet or snow-covered roads. The system gives the Toyota 4Runner a sure-footed feel because power is applied to all four wheels, improving traction. When the front wheels slip, up to 70 percent of the power goes to the rear wheels. When the rear wheels slip, up to 53 percent of the power goes to the front wheels.
V8 engines are mated to a new five-speed automatic transmission that improves response and efficiency. The transmission is equipped with Artificial Intelligence Shift control, which changes gear-shifting patterns according to driving conditions and driver intent. It works well and seems to understand when you want to cruise and when you want to get with the program. V8 4WD 4Runners operate in full time four-wheel-drive; unlike V6 4Runners, the V8 4WD models do not offer a 2WD High mode. V8 4WD models come standard with the Torsen sensing type limited-slip differential with a locking feature.
All 4WD 4Runners come with Toyota's Downhill Assist Control (DAC) system. It works similarly to Land Rover's Hill Descent Control to control the speed and progress of the vehicle down steep grades. Shift into 4WD low-range, check to make sure Downhill Assist is activated, pull to the edge of the nearest precipice, take your feet off the pedals, and steer your way slowly down the trail. Downhill Assist works very well and is easy to control. Touch the gas or brakes to slow or speed up your progress, then take your feet back off the pedals and the system comes back on, the ABS making a noisy "dunk, dunk, dunk" sound as it lowers the Toyota 4Runner safely down the grade. Downhill Assist will keep the 4Runner pointed in the direction you steer it as it prevents the vehicle from getting sideways on steep descents by using the anti-lock brake system. The system will work continuously for three minutes, but Toyota officials say it only needs the shortest of breaks to continue.
All 4Runners also come with a new Hill-start Assist Control (HAC) designed to prevent the vehicle from rolling backward or slipping sideways when starting off on a steep ascent. The system controls the brakes to stop the individual wheel or wheels, preventing the vehicle from rolling backward or slipping sideways.
The Toyota 4Runner is a truck, not a car. Rather than using a unit-body like the Toyota Highlander or RAV4 or Jeep Grand Cherokee, the 4Runner is built on a new ladder frame that features full-length boxed section frame rails. Toyota also steered away from using an independent rear suspension like the one on the Ford Explorer and many cars. An independent rear suspension offers better ride quality and allows for a roomier interior. Toyota said it used a live rear axle because it offers more suspension travel, and because off-road capability was a high priority. The Toyota 4Runner suspension uses a four-link rigid type suspension in the rear and double wishbones in front. Coil springs over gas shocks are used front and rear.
V8 Limited models offer an optional rear air suspension for improved ride and performance when towing or hauling heavy loads. The air suspension automatically adjusts the ride height according to vehicle load. The driver can raise the rear suspension when driving off road to increase the ground clearance and improve the rear departure angle.
A new damping system called X-REAS (standard on Sport, optional on Limited models) improves the handling dynamics on the road with no compromise in off-road articulation. In reduces the tendency of the vehicle to bob up and down in corners and improves handling by damping body pitch and roll. The system links the shocks diagonally through hydraulic lines (e.g., the front left shock is linked to the rear right shock). A central control absorber helps balance shock damping.
Anti-lock brakes (ABS) with brake assist and electronic brake-force distribution (EBD) come standard on all 4Runners. The four-channel ABS helps prevent the wheels from locking during severe braking conditions, improving driver control. The 4Runner's ABS has an off-road algorithm to improve stopping performance in slippery conditions. Brake-force distribution automatically balances the braking force front to rear for shorter stopping distances. Brake assist helps a driver who may not be pressing the brake pedal hard enough during an emergency stopping situation; brake assist generates additional brake force to assist the driver.
Vehicle Skid Control comes standard on all 4Runners. Vehicle Skid Control (VSC) utilizes the braking system to help the driver maintain control in adverse conditions. 2WD models come with traction control, which reduces tire slippage for enhanced stability under acceleration. 4WD models are equipped with active traction control (A-TRAC), which uses sensors and software to deliver smoother power application in all conditions.
A plastic fuel tank offers better protection against leaks than metal tanks, which tend to leak over time at connections. The plastic tank is surrounded by a steel case for protection.
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