Delphi TC3972 Suspension Trailing Arm - Rear Upper

Rear Upper Trailing Arm for Toyota 4Runner

Delphi TC3972 is a rear upper suspension trailing arm built for 1996-2002 Toyota 4Runner applications. It uses a tubular steel construction with rubber bushings at both ends to support rear suspension location and alignment.

Fits 1996-2002 Toyota 4Runner, rear upper. This Delphi TC3972 replacement is engineered with OE-focused dimensional and material analysis for proper part-to-vehicle compatibility.

Key Features

• Steel tubular construction for suspension strength
• Black finish with black bushings
• Rubber bushings included at both ends
• Standard replacement grade
• Rear upper position
• Non-adjustable, non-greaseable design

Detailed Description

The Delphi TC3972 suspension trailing arm is a direct-fit rear upper component for the Toyota 4Runner. Delphi applies OE-based engineering and validation to its aftermarket steering and suspension portfolio, including dimensional and material checks to help ensure the part matches the original application. The arm measures 299.7 in length and uses a tubular steel body with rubber bushings for controlled suspension movement and consistent rear axle location.

This part cross-references Mevotech Supreme CMS861168 and Toyota 48710-35030 for the same application. If you are replacing a worn rear upper trailing arm on a 1996-2002 Toyota 4Runner, Delphi TC3972 provides the correct position-specific solution.

What This Part Helps Address

• Rear suspension clunking from worn bushings
• Excessive rear axle movement under load
• Uneven rear suspension geometry
• Handling instability caused by a fatigued trailing arm
• Noise or vibration from a damaged rear upper arm

Installation Notes and Tips

Install in the rear upper position only. Mounting hardware is not included, so reuse or source the correct hardware as needed. Because this is a bushing-equipped suspension arm, inspect adjacent rear suspension components and alignment condition during replacement.

Quality Assurance

Delphi validates OE-style replacement parts through dimensional and material analysis and subjects components to extreme temperature and salt-spray testing to verify durability in demanding conditions. This testing approach supports consistent fit and long-term suspension performance for Toyota 4Runner rear upper applications.