Delphi TC1639 Suspension Ball Joint - Front Upper

Brand Delphi TC1639
Position Front Upper
Adjustable No
Ball Joint Assembly Yes
Bushings Included No
Castle Nut Included Yes
Color Gray
Cotter Pin Hole Yes
Cotter Pin Included Yes
Distance Between Mounting Holes 95.0
Dust Boot Included Yes
Dust Boot Material Choloroprene Rubber (CR)
Grease Fitting Included No
Height 4.567
Height 116.0
Item Grade Standard Replacement
Length 812
Material Steel
Maximum Outside Diameter 2.354
Maximum Outside Diameter 59.8
Mount Plate Included No
Mounting Hardware Included Yes
Mounting Hole Quantity 3
Nuts Included Yes
Stud Tapered End 1 Diameter 0.634
Stud Tapered End 1 Diameter 16.1
Stud Tapered End 2 Diameter 0.748
Stud Tapered End 2 Diameter 19.0
Stud Thread Diameter 0.551
Stud Thread Diameter 14.0
Stud Thread Length 0.787
Stud Thread Length 20.0
Stud Thread Pitch 1.5
Stud Type Threaded
Suspension Grade Type Standard
Tapered Stud Yes
Washers Included No
Width 73.0
Fits Chevrolet and GMC · 2 vehicles

Standard replacement. OE expertise helps ensure compatibility with the aftermarket part.

Steel construction. Built with a dust boot and threaded stud for dependable suspension service.

Hardware included. Comes with mounting hardware, nuts, castle nut, and cotter pin.

Cross-references Mevotech Supreme MK6294, MOOG Chassis Products K6294 and QuickSteer K6452 for the same application. See all 6.

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OE-Style Front Upper Ball Joint

Delphi TC1639 is a standard replacement suspension ball joint for the front upper position on select 1988 Chevrolet K3500 and GMC K3500 applications. Built with OE-focused dimensional and material analysis, it is made to match the original fit and steering geometry requirements of the vehicle.

For buyers searching for a front upper ball joint for 1988 Chevrolet K3500 or 1988 GMC K3500, Delphi TC1639 provides a direct replacement option with the hardware and service features needed for a proper suspension repair.

Key Features

  • Front upper suspension ball joint assembly
  • Steel construction with gray finish
  • Dust boot included with chloroprene rubber material
  • Castle nut, cotter pin, nuts, and mounting hardware included
  • Threaded tapered stud with 14.0 mm thread diameter and 1.5 pitch
  • Standard replacement grade for OE-style service
  • No grease fitting for a sealed-style design
  • Three mounting holes with 95.0 mm spacing

Detailed Description

Delphi TC1639 is engineered as a suspension ball joint for the front upper location, with OE-based dimensional and material checks to support proper fitment and alignment on the vehicle. The steel body, tapered stud, and included dust boot help support durable service in demanding suspension environments, while the sealed design eliminates the need for a grease fitting. This part cross-references MOOG Chassis Products K6294 for the same application.

Compatible With 1988 Chevrolet K3500, front upper, and 1988 GMC K3500, front upper. Delphi TC1639 is a practical replacement choice when restoring steering response and suspension joint integrity on these heavy-duty trucks.

What It Helps Address

  • Excessive front-end looseness or play
  • Clunking or knocking from the upper suspension area
  • Uneven tire wear related to worn suspension joints
  • Steering wander caused by worn ball joint components
  • Restoring proper suspension articulation at the front upper position

Installation Notes and Tips

Verify the front upper position and confirm stud dimensions, mounting-hole spacing, and taper before installation. Because this is a suspension component, alignment should be checked after replacement. Use the included castle nut and cotter pin during installation, and inspect adjacent suspension parts for wear while the assembly is apart.

Quality Assurance

Delphi applies OE-focused testing and material analysis to its aftermarket steering and suspension parts. This ball joint is evaluated for temperature extremes and salt-spray exposure to support corrosion resistance and service durability in real-world conditions.

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1988ChevroletK3500Front Upper—
1988GMCK3500Front Upper—
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Mevotech Supreme — MK6294MOOG Chassis Products — K6294QuickSteer — K64521557590215617716B6294