The GM 10-Bolt semi-floating rear axle has been in use for over 40 years. It’s been used in passenger cars, and light duty pickups and SUVs over the decades. In the off-road world, you’ll typically find them under full-size 1/2-ton and some 3/4-ton GM trucks, Blazers/Jimmys, Suburbans, Tahoes/Yukons, and Cadillac Escalades. The rear axle is a C-clip design unit, meaning the axleshafts are retained using a metal C-clip in the middle of the differential.

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In the early days, the ring gear size was 8.5 inches, but the size increased to 8.625 inches mid-1999. The pinion is a 30-spline piece and the pinion nut is 1 1/4 inches. Axleshaft spline count can be either 28 or 30 splines. Push these axles much harder, the tubes begin to flex, possibly resulting in differential wear and ultimately carrier failure. These axles are good to upgrade if they’re the existing axle and you refrain from pushing past the limits we mentioned. Those who need more beef than the 10-Bolt may want to search out a Corporate 14-bolt or Dana 60.

Depending on your vehicle, either could be nearly a bolt-on affair. However, pinion yokes or U-joints may differ from the 10-Bolt and the heavier axles usually have 8-lug wheel lug patterns. Given that this axle has been in production for so long and in so many applications, you have access to wide aftermarket support, including ring-and-pinion ratios up to 5.57:1. 2001 dodge neon ecm drivers. Your limited slip and locker choices are immense, and alloy replacement axle shafts are readily available. Items such as C-clip eliminator and disc brake kits are on the market as well. Typically, a GM 10-Bolt came from the factory with a 1310-series U-joint yoke with metal retention straps like the stock one shown here.

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Yokes are readily available to upgrade to the much stronger 1350-series joint using more reliable U-bolts for retention. Stronger Factory 6-Lug Option If the 10-Bolt just isn’t going to be enough axle for you, but you want to retain that 6-lug wheel pattern, try scouting out a heavy-duty 6-lug axle like the semifloating 6-lug 14-Bolt axle.

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