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Correct Your Pinion Angle After a Lift, Restore Factory-Smooth Articulation
The SuperPro TRC497 heavy duty adjustable lower trailing arm kit is built for the Toyota FJ Cruiser and 4Runner. Lifting your truck adds ground clearance and capability, but it also shifts suspension geometry, including the rear pinion angle on longitudinal engine layouts. The TRC497 lets you dial the pinion angle back in while upgrading to SuperPro's polyurethane bushings for improved durability, higher articulation, and a maintenance-free design that holds up to years of on-road and off-road use.
Key Features
- Heavy duty adjustable design corrects rear pinion angle after a lift
- SuperPro polyurethane bushings replace worn factory rubber bushings
- Improves articulation for better off-road wheel travel
- Maintenance-free bushing design, no grease fittings required
- Reduces deflection for more predictable rear axle control
- 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 | TRC497 |
| SKU | SPRTRC497 |
| UPC | Not published by manufacturer |
| Position | Rear, lower trailing arm, adjustable kit |
| Bushing Material | SuperPro polyurethane |
| Adjustability | Threaded, adjustable length |
| Warranty | Manufacturer limited warranty against defects |
What's Included
- 2 x SuperPro TRC497 adjustable lower trailing arms
- Integrated polyurethane 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 TRC497?This is a SuperPro heavy duty adjustable lower trailing arm kit for the Toyota FJ Cruiser and 4Runner, designed to correct rear pinion angle after a lift while upgrading to durable polyurethane bushings.
Why does pinion angle change after a lift kit?Raising ride height changes the operating angle of the rear driveshaft and differential, which can create vibration and accelerate U-joint wear if the trailing arms are not adjusted to correct the geometry.
Does this kit work on a stock height truck?Yes. Even at stock ride height, upgrading to SuperPro's polyurethane bushings improves durability and articulation compared to the factory rubber bushings, which soften and wear over time.
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 polyurethane bushing require maintenance?No. The design is maintenance-free and does not require grease fittings or periodic servicing.
Will this kit improve articulation off-road?Yes. The adjustable design and upgraded bushings allow for improved wheel travel and articulation compared to the factory trailing arms, which is especially useful on lifted trucks.
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 lower trailing arms from the frame and axle mounting points
- Install the SuperPro adjustable lower trailing arms using the supplied hardware
- Adjust the arm length to correct the rear pinion angle to specification
- 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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