1973-1987 GMC C15 2WD 6"/7-8" Drop Spindle, Coil & Shackle Kit - 1.25" Rotors + Shocks + C-Notch
GMC-specific listing: This version is cataloged specifically for 1973-1987 GMC C15 2WD squarebody trucks, with GMC-focused fitment, search terms and product navigation for the squarebody C15 platform.
This deep-drop squarebody package is built around a six-inch front reduction and an adjustable seven-to-eight-inch rear drop for a tucked, performance-truck profile.
This is the 1.25-inch rotor spindle version. Measure the front rotor thickness before ordering; the 1.00-inch and 1.25-inch spindle versions are different applications and should not be substituted for one another. The six-inch front reduction is achieved as a system: approximately three inches from the drop spindles plus three inches from the lowering coils. The rear drop is adjustable from approximately seven to eight inches by selecting the appropriate shackle mounting position after the six-inch flip is installed. This version includes matched drop shocks for both ends, reducing the number of separate suspension pieces needed to finish the lowering package. The included bolt-on C-notch makes this the more complete deep-drop version of the same basic suspension combination.
Kit Contents:
- 3-inch heavy-duty front drop spindles (pair)
- 3-inch front lowering coils (pair)
- 6-inch rear axle flip kit
- 1-2 inch adjustable rear drop shackles
- front drop shocks (pair)
- rear drop shocks (pair)
- bolt-on rear C-notch kit
Vehicle Fitment:
- 1973-1987 GMC C15 2WD
Important Fitment & Installation Notes:
- Front and rear drop shocks are included, matching shock travel to the lowered suspension combination supplied in this kit.
- A bolt-on rear C-notch is included with this SKU to provide the axle-to-frame clearance required by this drop.
- Rotor check: this SKU is for 1.25-inch-thick front rotors. Measure before ordering.
- Trekline notes that some 15-inch wheel combinations may require lower-control-arm grinding for adequate spindle/wheel clearance. Check the complete wheel, tire and suspension package during installation.
- Perform a professional alignment after installation and verify steering clearance, brake-hose routing, bump-stop clearance, shock travel and fastener torque before regular road use.
- Lowering amounts are referenced from stock OEM ride height; worn springs, prior suspension modifications or existing sag can change the measured result.
Front Drop: 6 inches
Rear Drop: 7-8 inches
Placement: Front & Rear
Brand: Trekline Motorsports
Trekline SKU: 1250DR150
