Delphi TC8400 Suspension Control Arm - Rear Right Upper Forward

OE-Style Rear Right Upper Forward Control Arm

Delphi TC8400 is a suspension control arm built for the rear right upper forward position on select Honda and Acura vehicles. It uses a tubular steel construction with a painted black finish and rubber bushings to support stable rear suspension geometry and consistent road feel.

Compatible with 2014-2020 Acura MDX, 2016-2022 Honda Pilot, 2017-2023 Honda Ridgeline, and 2019-2022 Honda Passport in the rear right upper forward position, Delphi TC8400 is a standard replacement part for OE-style service.

Key Features

• Part number: TC8400
• Rear right upper forward suspension control arm
• Tubular steel construction with painted black finish
• Rubber bushings included
• Standard replacement grade
• Not adjustable, not greaseable, and no grease fitting included
• Dimensions: 339.5 mm length, 54.7 mm width, 47.4 mm height
• Distance between mounting holes: 287.5 mm

Detailed Description

Delphi applies OE-focused dimensional and material analysis to help ensure proper match-up between the original and replacement part. TC8400 is engineered for the rear right upper forward suspension location and is built to handle demanding temperature and corrosion testing, including exposure below -40 degrees C, above 120 degrees C, and extended salt spray testing. This makes it a practical choice for restoring rear suspension alignment and control on the Acura MDX, Honda Pilot, Honda Ridgeline, and Honda Passport.

This part cross-references MOOG Chassis Products RK643499 for the same application.

What It Helps Address

• Rear suspension looseness or clunking from worn control arm bushings
• Uneven rear tire wear caused by suspension geometry issues
• Steering or handling instability related to rear suspension wear
• Noise from deteriorated rubber bushings in the rear right upper forward position
• Replacement needs after corrosion or fatigue in the original control arm

Installation Notes and Tips

Install TC8400 in the rear right upper forward position only. Mounting hardware is not included, so reuse or source the correct hardware as needed. Because this control arm is not adjustable, verify suspension alignment after installation to confirm the rear geometry is within specification.

Quality Assurance

Delphi uses OE-based engineering, dimensional checks, and material analysis to support fit and performance consistency. The part is also tested for temperature extremes and salt spray exposure to help validate durability in real-world suspension service.