About 14 Bolt Axle You hit just one too many bumps the wrong way while you were out with your 4x4, and snapped the back axle. Now you need to find a new 14-bolt axle so you can get back out there and hit the trails. The 14-bolt rear end is found in GM trucks and vehicles from the 1970s through 2000. The design is a full-floating one, which means that the axle does not have to bear the full weight of the vehicle, and simply transfers power from the differential to the wheel. A 14-bolt yoke is sometimes necessary as well if you need to replace the axle, but not always, so it pays to check that out before you replace the full back end axle. Normally this axle type can stand a lot of abuse, but if you hit something just the right way, you can end up testing it too hard. No matter what you do with your 4x4 or truck, the vast inventory on eBay means that you can find a 14-bolt axle to get yourself back on, or off, the road again in no time.