Installing new 14 bolt shock mounts isn't exactly a glamorous job, but it's one of those things you have to get right if you don't want your shocks snapping off or binding the first time you hit a decent trail. When you're dealing with a GM 14-bolt—whether it's the massive 10.5-inch full floater or the slightly smaller 9.5-inch semi-floater—you're working with a heavy-duty piece of iron that demands equally heavy-duty hardware. Most guys swapping these axles into Jeeps, older Chevys, or custom crawlers quickly realize that the factory shock locations are almost never where you need them to be.
The 14-bolt is legendary for being nearly indestructible, but it's also a bit of a pig when it comes to weight and size. Because the pumpkin is so large, and the axle tubes are beefy (usually 3.375 or 3.5 inches in diameter), you can't just slap on any generic bracket and hope for the best. You need mounts that are specifically contoured for those large tubes and built to handle the leverage that long-travel shocks can put on a weld.
Why You Can't Usually Keep the Stock Mounts
If you managed to pull a 14-bolt out of a junked 3/4-ton Suburban or an old Silverado, you probably noticed the stock shock mounts are either rusted to nothing or pointing in a direction that makes zero sense for your build. Factory mounts are designed for factory ride heights and specific frame clearances. Once you throw a lift kit into the mix, or if you're doing a "shave" on the bottom of the differential to gain some ground clearance, those stock mounts usually end up in the way.
Most people just cut the old ones off with a torch or a grinder and start fresh. It's cleaner, and it lets you dial in your suspension geometry. If you're moving your shocks "outboard" of the frame to get more stability, or if you're angling them toward the center for more articulation, you're going to need a set of aftermarket 14 bolt shock mounts that can be positioned exactly where the tape measure says they should go.
Choosing the Right Style of Mount
There are a few different ways to go when you're looking at mounts. You've got your basic flat tabs, your wrap-around "cradle" style mounts, and high-clearance options.
Basic tabs are just two pieces of steel that you weld to the tube. They're cheap and they work, but they don't offer much in the way of lateral support. If you're doing high-speed desert stuff or heavy rock crawling, those single tabs can sometimes bend if the shock takes a side load.
The wrap-around or "contoured" 14 bolt shock mounts are much better for most builds. These are laser-cut to match the radius of the axle tube perfectly. Because they wrap around a portion of the tube, you get more "weld surface area." More weld means a stronger bond, which is what you want when you're bouncing a 6,000-pound rig off a ledge.
Then there are high-clearance mounts. These usually tuck the shock eyelet up higher, closer to the centerline of the axle tube. This is a huge deal if you're tired of your shock mounts acting like anchors and getting hung up on rocks. The downside is that you need a shorter shock or a higher upper mounting point on the frame to make them work.
Geometry Matters More Than You Think
I've seen plenty of guys weld their 14 bolt shock mounts on, bolt up the shocks, and then realize their shocks bottom out before the suspension even hits the bump stops. That's a fast way to ruin an expensive set of King or Fox shocks.
When you're mocking these up, you really need to cycle the suspension. Don't just guess. Tack the mounts in place, remove the springs, and jack the axle up until it hits the bump stops. If your shock is fully collapsed before the axle stops moving, you need to move that mount lower on the tube or find a different mounting solution.
Also, think about the angle. If you lean the shocks over at a steep angle to get more travel, you're actually reducing the effectiveness of the shock's valving. A shock works best when it's as vertical as possible. A little bit of an inward tilt is fine for clearance and can help with stability, but once you start laying them down past 30 degrees, you're losing a lot of control over the axle's movement.
Material and Thickness
Don't go cheap here. You'll see some "universal" mounts made out of 3/16-inch steel. For a 14-bolt, that's just asking for trouble. You want mounts that are at least 1/4-inch thick. Some of the beefier options out there are even 3/8-inch, though that might be overkill for anything other than a dedicated ultra-4 racer.
The bolt hole size is also important. Most heavy-duty shocks use a 1/2-inch or 5/8-inch bolt. Make sure your 14 bolt shock mounts are drilled for the hardware you plan to use. If they come with a 1/2-inch hole and you need a 5/8, you can always drill them out, but it's a lot easier to just buy the right ones from the start.
Installation Tips for a Solid Weld
Since the 14-bolt has such thick axle tubes, you need to make sure you're getting good penetration with your welder. This isn't the place for a tiny 110v hobby welder. You'll want a decent 220v MIG or TIG setup to make sure that mount isn't going anywhere.
Before you even touch a spark to the metal, clean the axle tube until it shines. Use a flap disc on a grinder to get rid of all the rust, paint, and road grime. Do the same for the mounts themselves. If you try to weld through the mill scale on new steel, the weld won't be nearly as strong.
Another pro tip: check your clearance with the brake lines and the leaf spring U-bolts. On a 14-bolt, space gets tight pretty quickly. I've seen people weld their shock mounts on only to realize they can't get their U-bolts seated or that the shock body is rubbing against the brake caliper. Mock everything up—and I mean everything—before you lay down your final beads.
Keeping It Low Profile
If you're building a "low center of gravity" (LCG) rig, you're probably trying to keep the ride height down while still using long shocks. This is where those high-clearance 14 bolt shock mounts really shine. By moving the mounting point from the bottom of the tube to the back or even slightly above the centerline, you can run a longer shock without needing to cut holes in the floor of your truck. Just keep an eye on your "up-travel." It's a balancing act between ground clearance and suspension performance.
Final Thoughts on Hardware
Lastly, don't forget the hardware. Use Grade 8 bolts, always. With the weight of a 14-bolt swinging around down there, you don't want a cheap hardware store bolt shearing off. Use nyloc nuts or distorted thread lock nuts so they don't vibrate loose on the washboard roads.
Getting your 14 bolt shock mounts sorted out might feel like a small detail in the middle of a big axle swap, but it's the difference between a truck that rides like a dream and one that's constantly breaking parts. Take the time to measure three times, tack once, and weld it like you mean it. Your suspension (and your wallet) will thank you when you aren't replacing blown-out shocks every other weekend.