Axle meets frame rail, and the frame rail always wins. That is the whole reason the C-notch exists.
Why it matters
The lower you take the rear of your truck, the less room the axle has before it runs into the frame. Past a certain point every bump slams the axle into the rail, and that is no way to drive or to keep a truck together. A C-notch cuts a pocket into the frame so the axle has somewhere to go, which gives you suspension travel at a low ride height.
What you need to know
Our Frame C-Notch Kit is built for 1963-72 Chevy and GMC pickups. It is a weld-in design, precision cut to fit the factory frame rails, and sold as a complete kit. You are cutting and welding the frame, so this is structural work. If you do not have the skills or the tools, a good fab shop will knock it out without drama. Verify your fitment and clearances before the first cut.
One more thing: a notch is one piece of the rear end puzzle. Decide your ride height first, then plan the shocks, the axle location and how the whole back half goes together. If you are only after a modest drop, you may never have to touch the frame. Notch when you actually run out of axle travel, not because the internet said so.
Keep building
- Frame C-Notch Kit, 1963-72 Chevy/GMC Pickup
- Watts Link, Adjustable Rear Suspension Kit
- C10 Rear Back Half Kit, Lay Frame Air Ride (1963-1972)
- Front 3"/Rear 5" Drop Spring Lowering Kit w/ Shocks, 1963-72 C10
- Watts Link vs. Panhard Bar
- How to Lower a C10 Truck (Complete Guide)
Planning a build and want a second opinion? Call 805-272-6924 or email contact@dondottasolutions.com.
