SUPERPRO Steering Rack Ends for MITSUBISHI PAJERO SPORT

A rack end, also called an inner tie rod end, screws onto the end of the steering rack and connects it to the outer tie rod end at the wheel. It contains a ball joint that lets the steering linkage pivot as the suspension moves up and down and the steering turns. When rack ends wear, play develops in the steering, which can cause clunks, wander and uneven tyre wear. Rack ends are specific to each rack, so use the vehicle search to find steering rack ends to suit your MITSUBISHI PAJERO SPORT.

What Does a MITSUBISHI PAJERO SPORT Steering Rack End Do?

On rack and pinion steering, the rack is a toothed bar that slides left and right inside its housing when the steering wheel turns. A rack end is fitted to each end of that bar. The rack end has a ball joint at the rack, so the rod can swing up and down with the suspension, and a threaded outer section that connects to the outer tie rod end.

When the rack moves, the rack ends push and pull on the outer tie rod ends, which turn the steering knuckles and wheels. Because the ball joint in each rack end must pivot through every bump and every steering movement, it carries load constantly. The threaded connection to the outer tie rod end is also where the toe setting is adjusted during a wheel alignment.

MITSUBISHI PAJERO SPORT Rack End vs Tie Rod End

The rack end and the tie rod end are two joints at opposite ends of the same steering link. The rack end is the inner joint, at the steering rack, usually hidden inside a rubber boot. The tie rod end is the outer joint, at the steering arm on the knuckle, and is usually visible near the wheel. Both are ball joints and both wear, so they are often checked together. In Australia, "rack end" and "inner tie rod end" usually describe the same part.

Signs Your MITSUBISHI PAJERO SPORT Rack Ends May Be Worn

Common signs include a clunk or knock from the front when turning or driving over bumps, free play at the steering wheel, and steering that feels vague or wanders. Uneven tyre wear is another common indicator, since a worn rack end lets toe change as the vehicle moves, scrubbing the inner or outer edge of the tyre.

You may also notice the steering wheel sits slightly off-centre, or that the vehicle feels different turning one way compared with the other. Because rack end wear develops gradually, it is often first noticed as tyre wear or a clunk over speed humps rather than an obvious change in steering feel.

Other Possible Causes

Similar symptoms can come from worn outer tie rod ends, ball joints, rack mount bushes, wheel bearings, internal rack wear or worn suspension bushes. Incorrect alignment and uneven tyre pressures can also cause wander and tyre wear. Have a technician inspect the whole steering and front suspension before replacing parts.

How MITSUBISHI PAJERO SPORT Rack Ends Are Checked

A technician will usually check rack ends with the vehicle raised and the front wheels off the ground. Gripping the tyre at the three and nine o'clock positions and rocking it side to side reveals play in the steering joints. To isolate the rack end, the technician feels through the rack boot, which covers the inner joint, while the tyre is rocked or the steering is moved. A worn rack end has noticeable movement at the joint.

Another check is to squeeze the rack end through the boot while a second person turns the steering slightly back and forth. Movement or a knock at the inner joint, without matching movement of the rack bar, points to wear. Torn or split rack boots should be replaced at the same time, since they let in the dirt and water that wear the joint.

Why MITSUBISHI PAJERO SPORT Rack Boots Matter

The rubber boots, or gaiters, at each end of the steering rack cover the rack ends and the exposed section of the rack bar. They keep water, mud, dust and grit out of the rack end joints and away from the rack's internal seals. When a boot splits, contamination enters quickly, particularly on a 4WD that drives through water, mud or sand, and the rack end and rack seals can wear rapidly.

Check the rack boots whenever the vehicle is serviced, and after off-road trips. Look for splits, tears, perished rubber and loose clamps. On hydraulic power steering racks, a boot that is wet or bulging with fluid points to a leaking rack seal.

Rack Ends for a Lifted MITSUBISHI PAJERO SPORT

Rack ends on a lifted 4WD can carry more load than on a standard vehicle. A lift on an independent front suspension 4WD changes the angle of the tie rods relative to the rack, so the rack end joints work at a steeper angle, closer to the limits of their range of movement. Larger, heavier tyres increase the leverage acting on the steering when they strike an obstacle, and that force passes directly through the rack ends.

As a result, rack ends on a lifted 4WD with larger tyres can wear faster, and some owners choose heavier-duty rack ends to suit the extra load. Whether a heavier-duty part suits your vehicle depends on the vehicle, its lift height and how it is used. Checking the rack ends more often is worthwhile on any modified 4WD.

Replacing MITSUBISHI PAJERO SPORT Rack Ends: An Overview

Steering components are safety-critical, so rack end replacement should be carried out by a qualified technician. The vehicle is supported on rated stands, the outer tie rod end is separated from the rack end, and the rack boot is removed to expose the inner joint. The old rack end is unscrewed from the rack, often after releasing a locking tab, lock washer or staked section that stops it working loose.

Before removal, the position of the outer tie rod end is usually measured or marked, so the new rack end can be set to a similar length and keep the toe close to its previous setting. The new rack end is screwed onto the rack and tightened to the manufacturer's torque specification, then secured with the locking method the manufacturer specifies. A new boot and clamps are fitted, and the outer tie rod end is reconnected and secured.

A wheel alignment is required after replacing rack ends, since the work changes the toe setting. Driving with incorrect toe wears tyres quickly and affects how the vehicle steers.

Replacing MITSUBISHI PAJERO SPORT Rack Ends in Pairs

Rack ends wear at a similar rate on both sides, since they carry similar loads. If one rack end has worn enough to need replacing, the other is often not far behind. Replacing both at once avoids paying for a second wheel alignment soon after the first. Check the condition of the outer tie rod ends at the same time, since they wear in the same conditions and are easiest to replace while the steering is already apart.

Choosing the Right MITSUBISHI PAJERO SPORT Rack End

Rack ends are specific to the steering rack. Thread size and pitch at the rack, the outer thread for the tie rod end, overall length and the ball joint design all vary between makes, models and model years. A rack end designed for one rack will not fit another. Confirm your vehicle's make, model and year, and whether the rack is hydraulic or electric, before ordering.

Shop MITSUBISHI PAJERO SPORT Steering Rack Ends with Formula 4x4

Rack ends take a beating off road, and replacements sit in the Formula 4x4 steering parts range ready for a quick swap.

Start by confirming that the play comes from the rack ends rather than the outer tie rod ends, ball joints or rack mounts. Search by your MITSUBISHI PAJERO SPORT to find steering rack ends to suit your MITSUBISHI PAJERO SPORT, and plan for a wheel alignment after fitting. If you are unsure which part your vehicle needs, contact the Formula 4x4 team.