Delphi TC1640 Steering Idler Arm

Delphi TC1640 Steering Idler Arm

Delphi TC1640 is a forged steering idler arm built for OE-style replacement on select Chevrolet and GMC trucks. It is pre-greased, greaseable, and supplied with a grease fitting, castle nut, and cotter pin for service-ready installation.

Key Features

• Forged construction for strength in steering linkage service
• Pre-greased and greaseable for routine maintenance
• Includes grease fitting, castle nut, and cotter pin
• Black finish
• Standard replacement grade
• Bracket hole quantity: 2
• Mounting hole diameter: 0.48 in. / 12.2 mm
• Length: 5.63 in. / 143.0 mm

Detailed Description

The Delphi TC1640 steering idler arm is engineered for steering systems that require a direct replacement part with OE-level dimensional and material analysis. Delphi applies its OE experience to the aftermarket by validating parts for temperature extremes and corrosion exposure, helping maintain consistent fit and function in demanding driving conditions. This part cross-references MOOG Chassis Products K6331 and K6483T for the same application.

Compatible With 1988-1991 Chevrolet C1500, with bracket; improved design. Compatible With 1988-1991 Chevrolet C2500, with bracket; improved design. Compatible With 1988-1991 Chevrolet C3500, with bracket; improved design. Compatible With 1988-1991 Chevrolet K1500, with bracket; improved design. Compatible With 1988-1991 GMC C1500, with bracket; improved design. Compatible With 1988-1991 GMC C2500, with bracket; improved design. Compatible With 1988-1991 GMC C3500, with bracket; improved design. Compatible With 1988-1991 GMC K1500, with bracket; improved design.

Common Uses

• Restoring steering linkage stability on Chevrolet C1500, C2500, C3500, and K1500 trucks
• Replacing worn idler arm components that can contribute to steering play
• Addressing looseness or wandering in the steering system
• Supporting proper alignment of the steering linkage on GMC C1500, C2500, C3500, and K1500 trucks

Installation Notes and Tips

Verify bracket style, mounting hole diameter, and overall length before installation. Inspect adjacent steering linkage components for wear, and grease the fitting during service intervals to maintain smooth operation. Confirm application details against the vehicle’s steering configuration, especially on 1988-1991 Chevrolet and GMC trucks with bracket and improved design notes.

Quality Assurance

Delphi tests steering components across extreme temperature and salt-spray conditions and uses dimensional and material analysis to support OE-style compatibility. The TC1640 is built as a standard replacement part for dependable steering service.