1973-1987 GMC C15 2WD 3"/6" Drop Spindle 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.
Move beyond a mild drop with a 3-inch spindle reduction up front and a six-inch rear flip, keeping the kit focused on the factory 2WD GMC C15 suspension layout.
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. 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)
- 6-inch rear axle flip kit
- 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: 3 inches
Rear Drop: 6 inches
Placement: Front & Rear
Brand: Trekline Motorsports
Trekline SKU: 1250DR078
