2001–2007 Toyota Sequoia Adjustable Rear Trailing Arms

Installation Guide | Apoc Industries | Fits: 2001–2007 Toyota Sequoia | Stock to 6" Lift

Overview

This guide covers the installation of Apoc Industries adjustable upper and lower rear trailing arms for the 2001–2007 Toyota Sequoia. These arms allow you to correct pinion angle, restore proper axle position, and fine-tune wheelbase geometry after a rear lift. Arms are designed for stock to 6" of lift.

Pre-Install Checklist

Required Tools

• Floor jack and jack stands
• Torque wrench
• Socket set — metric and standard
• Digital angle finder or magnetic inclinometer
• Tape measure
• Grease gun
• Wheel chocks
• Safety glasses, gloves, and steel-toed boots (PPE)

Bushing Grease — Important

⚠ All Apoc Industries polyurethane bushings must be lubricated with silicone grease only. Never use petroleum-based grease on polyurethane bushings — petroleum grease will break down the polyurethane material and cause premature bushing failure. Grease all bushings thoroughly before and after installation.

Safety Warnings

⚠ Park on a level surface and chock the front wheels before lifting the vehicle. Always support the vehicle securely on jack stands. Never work under a vehicle supported only by a floor jack. Support the rear axle with a floor jack throughout the installation to prevent it from dropping when the arms are removed.

Critical Torque Note

⚠ Always final-torque all trailing arm bolts with the vehicle at ride height — full weight on the suspension. Torquing while the suspension is hanging will preload the bushings and cause premature failure.

Understanding Pinion Angle

Why Pinion Angle Matters

Most solid-axle trucks — including the Sequoia's 4-link rear suspension — leave the factory with approximately 1–3 degrees of nose-down pinion angle at static ride height. This small downward angle is intentional: under acceleration, axle wrap causes the pinion to rise slightly, bringing the U-joint operating angles closer to parallel — which is the ideal operating condition. The goal is to keep the operating angle at each U-joint in the 1–3 degree range when the vehicle is sitting at normal ride height under its own weight.

How to Measure Pinion Angle

• Measure with the vehicle on level ground at normal ride height — full weight on the suspension, gas tank reasonably full, no extra load in the bed
• Use a magnetic angle finder or digital inclinometer
• Measure the angle of the driveshaft
• Measure the angle of the pinion flange — place the tool on the flat face of the pinion yoke
• The difference between these two measurements is your true pinion angle
• Nose-down = positive number in standard shop language — the pinion is lower than the driveshaft centerline
• Target: 1–3 degrees nose-down at static ride height

Stock Arm Length Reference

• Lower trailing arms: approximately 27.0–27.5" center-to-center (eye-to-eye)
• Always measure your stock arms before removal — this is the most accurate baseline for your specific vehicle
• Apoc arms are designed to match stock length when fully collapsed and can extend up to +2.5" from stock

Suggested Starting Lengths (Fine-Tune on Vehicle)

Hardware Torque Reference

Torque specs are Toyota factory specifications. Always torque at ride height with full vehicle weight on the suspension.

Step-by-Step Installation Sequence

Step 1 — Prepare the Vehicle

• Park on a level surface and set the parking brake
• Chock the front wheels
• Raise the rear of the vehicle and support securely on jack stands under the frame
• Remove both rear wheels
• Place a floor jack under the rear axle to support it — do not allow the axle to drop freely when the arms are removed

Step 2 — Measure Stock Arms Before Removal

• Before removing anything, measure the center-to-center length of both the upper and lower stock trailing arms on each side
• Record these measurements — they are your baseline starting point for setting the new arm lengths

Step 3 — Remove Stock Trailing Arms

• Remove the upper trailing arms first — they typically have easier access
• Note the routing and orientation of any brake line or e-brake cable brackets attached to the arms before removal
• Remove the lower trailing arms
• Retain the factory hardware if it is in good condition, or use new hardware if supplied with your kit

Step 4 — Set New Arm Lengths and Lubricate Bushings

• Set the new Apoc upper and lower arms to the same center-to-center length as your measured stock arms as a starting point — refer to the suggested starting length chart above for lifted applications
• Ensure equal thread engagement on both ends of each adjustable arm
• Leave the jam nuts slightly loose — final length adjustment happens after the vehicle is at ride height
• Lubricate all polyurethane bushings with silicone grease before installation — do not use petroleum-based grease

Step 5 — Install New Trailing Arms

• Install the lower trailing arms first, then the upper arms
• Re-attach any brake line or e-brake cable brackets in their original orientation
• Ensure arms are oriented correctly with any brake line tabs facing the proper direction
• Hand-tighten all bolts at this stage — do not final torque yet

Step 6 — Reinstall Wheels and Lower to Ride Height

• Reinstall the rear wheels and torque lug nuts to 83 ft-lbs
• Lower the vehicle to the ground so the full weight is on the suspension
• Roll the vehicle forward and backward a few feet and bounce the rear suspension to allow it to settle at true ride height

Step 7 — Set Final Arm Length and Pinion Angle

With the vehicle at ride height, adjust arm lengths to achieve correct pinion angle and axle position. Refer to the pinion angle section above for measurement instructions.

• Target 1–3 degrees nose-down pinion angle at static ride height
• Adjust the lower arms primarily to correct pinion angle and restore proper axle position and wheelbase
• Use the upper arms for fine-tuning axle centering and final pinion correction
• Larger lifts generally require the arms to be lengthened from stock — refer to the suggested starting length chart and fine-tune from there
• Confirm the axle is centered side-to-side in the vehicle
• Once satisfied with the position, tighten the jam nuts firmly against the adjusters

Step 8 — Final Torque

With the vehicle at ride height and arm lengths confirmed:

• Lower trailing arm bolts (both ends): 96 ft-lbs
• Upper trailing arm bolts (both ends): 103 ft-lbs
• Tighten all jam nuts securely against the adjusters
• Double-check that all brake line and e-brake cable brackets are properly routed and clear of all moving parts
• Mark all torqued fasteners with a torque stripe for visual verification

Step 9 — Final Checks

• Re-check pinion angle after torquing to confirm nothing shifted
• Confirm the axle is centered side-to-side
• Cycle the suspension through full droop and compression to verify no binding or contact on any arm, bracket, or line
• Reinstall any underbody shields that were removed
• A professional 4-wheel alignment is mandatory after installation

Post-Install Notes

• Re-check all fastener torque after 50–100 break-in miles
• Grease all arm bushing fittings at each oil change interval using silicone grease
• Inspect all hardware for loosening at each oil change interval
• Always use silicone grease on polyurethane bushings — petroleum-based grease will break down the polyurethane and cause premature failure
• These arms are designed for stock to 6" of lift — extreme long-travel builds may require additional fabrication

Safety Disclaimers

This installation guide is provided for reference purposes. Apoc Industries assumes no liability for improper installation, use of incorrect torque values, or failure to follow all safety procedures. Suspension modifications significantly affect vehicle handling characteristics. Always have suspension work inspected by a qualified mechanic and comply with all local laws regarding vehicle modifications and lift height limits.

Apoc Industries | apocindustries.com | Document Version: v1.0