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Dial In Wheelbase and Pinion Angle With Full Off-Car Adjustability
The SuperPro TRC498 heavy duty upper trailing arm kit is built for the Toyota FJ Cruiser and 4Runner. This set gives you a wide adjustment range to correct wheelbase and rear pinion angle after a lift, while SuperPro's high-articulation lifetime bushings improve durability and wheel travel over the factory rubber bushings. The result pairs off-road capability with on-road refinement, giving you the ability to fine-tune your rig's suspension geometry for better ride quality and control.
Key Features
- Off-car adjustable from 302mm minimum to 337mm maximum for pinion angle correction
- SuperPro high-articulation lifetime bushings replace worn factory rubber bushings
- Corrects wheelbase and pinion angle changes caused by lift kits
- Improves off-road wheel travel and articulation
- Maintenance-free bushing design
- Direct bolt-on fitment at factory mounting locations
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2010-2014 | Toyota | FJ Cruiser |
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2010-2023 | Toyota | 4Runner | SR5 |
| 2010-2023 | Toyota | 4Runner | TRD Off-Road |
| 2010-2023 | Toyota | 4Runner | Limited |
| 2015-2023 | Toyota | 4Runner | TRD Pro |
Specifications
| Detail | Value |
|---|---|
| Brand | SuperPro |
| MPN | TRC498 |
| SKU | SPRTRC498 |
| UPC | Not published by manufacturer |
| Position | Rear, upper trailing arm, adjustable kit |
| Bushing Material | SuperPro polyurethane, high-articulation |
| Adjustment Range | 302mm minimum to 337mm maximum, off-car adjustable |
| Warranty | Manufacturer limited warranty against defects |
What's Included
- 2 x SuperPro TRC498 adjustable upper trailing arms
- Integrated high-articulation bushings
- Mounting hardware
- Installation instructions
About SuperPro
SuperPro has engineered performance suspension components since 1972, specializing in polyurethane bushings and suspension hardware designed to improve handling, durability, and control while maintaining daily drivability. Their components are developed and tested to meet or exceed OEM performance standards across daily drivers, overland builds, and dedicated off-road rigs.
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FAQ
What is the TRC498?This is a SuperPro heavy duty adjustable upper trailing arm kit for the Toyota FJ Cruiser and 4Runner, designed to correct wheelbase and rear pinion angle while upgrading to high-articulation bushings.
What is the adjustment range on this trailing arm?The TRC498 adjusts off-car from a minimum of 302mm to a maximum of 337mm, giving a wide range for pinion angle and wheelbase correction.
Do I need both the upper and lower trailing arm kits?For a complete pinion angle correction after a lift, most installers pair this upper kit with the SuperPro lower trailing arm kit, though the upper arm alone can be used for partial adjustment.
Does this kit work on a stock height truck?Yes. The high-articulation bushings improve durability and off-road travel even without a lift, compared to the factory rubber bushings, which wear and soften with age.
Is this a direct bolt-on replacement for the factory trailing arms?Yes. It bolts into the factory mounting locations on the Toyota FJ Cruiser and 4Runner without any drilling, cutting, or fabrication.
Does the bushing design require maintenance?No. The bushings are maintenance-free and do not require grease fittings or periodic servicing.
How do I know if my pinion angle needs correcting?Common signs include a vibration that increases with speed, driveline clunking, and premature wear on U-joints or the carrier bearing after installing a lift or leveling kit.
Can this be installed with basic hand tools?Yes. Installation requires common hand tools and a way to safely support the rear axle. No special tools or press equipment are required.
Install Instructions
- Raise and safely support the vehicle by the frame, allowing the rear axle to hang free
- Remove the factory upper trailing arms from the frame and axle mounting points
- Adjust the SuperPro TRC498 arms off-car to the target length before installation
- Install the adjustable upper trailing arms using the supplied hardware
- Torque all hardware to manufacturer specifications
- Lower the vehicle and check driveline angle with a digital angle finder
- Recheck hardware torque after the first 100 miles of driving
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