The Super 14 is a new suit for the good ol' GM Corporate 14-bolt axle. The GM 14-bolt is a great rear axle because it is strong, has many gear ratios, and has various types of lockers and limited slip differentials available. In addition, used 14-bolts are often dirt-cheap, making them a great low-buck upgrade for big tires on your trail rig.
The Corporate 14-bolt is found in many different General Motors 3/4- and 1-ton trucks and
Of course there is a price to pay for all these benefits. For one, it is heavy, and less weight is almost always a good idea for a trail rig. Also, the 14-bolt's ground clearance isn't great, as the centersection has a low-hanging lip. The Super 14 addresses both these issues and turns your heavy 1-ton axle into a sleek go-fast race rearend.
We went through the steps to make a dirty junkyard 14-bolt into a lighter, leaner Super 14 at Superior Axle & Gear. There are many options to build a Super 14, with hi-zoot shafts, special lockers, and TIG-welded chromoly housings, but our plan was taking off-the-shelf parts and seeing what we could gain (or lose) by going from a used Corporate to the Super 14.
Is It Worth It?
The Super 14 can save you between 32 and 97 pounds from a basic Corporate 14-bolt. There are also lighter-weight brake and hub options. But weight savings isn't the only plus for the Super 14; ground clearance also surpasses the Corp. version by 13/8 inches of smooth bottom ground clearance. Plus, the fabricated steel housing is much more versatile for welding axle trusses and link mounts to versus the cast centersection of a Corporate 14. However, the low pinion gearing of a 14-bolt still applies, but with this much axle 40-inch tires are easily in your future. Superior is selling a builder kit for approximately $1,950 with housing and third member. It is up to you to decide if the price is worth the benefits. We think if you're looking for a lighter, faster rearend then it definitely is.
When outfitted with an open carrier, drum brakes, and stock axles and hubs, this 14-bolt f
By removing the drum brakes and adding an Offroad Design disc brake conversion, we lost 65
The Super 14-bolt is a dropout-style axle that uses a Super 14 aluminum carrier housing an
The Super 14 carrier housing is cast aluminum for weight savings. We used the basic design
The Superior technicians set up the Super 14 third with a set of Superior 5.13 gears and s
The 14-bolt uses three pinion support bearings to better locate the pinion against the rin
The spool we're running in our Super 14 weighs 27 pounds; an open 14-bolt carrier is 31 po
The Super 14 housing comes with a fabricated centersection made of 3/8-inch plate on the f
To use our junkyard axleshafts and hubs, first measure from the overall width and the pini
Aligning the spindles in the housing is tricky. The Spyntec spindles are a tight fit, and
The completed Super 14 axle with gears; bearings; a spool; stock axleshafts; weld-on Offro
11501 South Avenue
484 County Road 113
Superior Axle & Gear
9580 Commerce Center Drive