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Then after a few years a larger drum was standard on the 3⁄ 4-short-ton (0.68 t) along with the even larger drum on the 1-short-ton (0.91 t). At first the differential was released with drums small enough to fit 15 in (380 mm) wheels. The first design of this differential had three different diameter brake drums.
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Drum brakes were offered on many full size GM vans for several more years, only by 2003 all vans came with disc brakes. Most of the 14 bolt differentials produced through model year 1998 were fitted with drum brakes, but some vehicles with the 14 bolt were upgraded to disc brakes in 1999. Additionally, the pinion received a larger diameter bearing while the pinion stayed the same diameter, which increased the durability of the pinion.
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One change that occurred in the second design was that on some models the brake drum could be removed without having to remove the hub and axle shaft. The second design was produced from 1986 to present. This design had drums that were held on by the wheel studs and had a smaller diameter pinion bearing than the second design. The first design remained unchanged until 1986. The first design was produced from 1973 to 1984.
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Not to be confused with the GM 14-bolt 9 and 1/2 inch ring gear rear differential which has c clips to retain the axles unlike a free floating axle that the heavy duty big brother utilizes. The 14 bolt differential is a popular axle swap option for Jeep Wrangler owners, and is referred to as the "corporate" 14 bolt because of the odd nature of GM's corporate structure in the 1970s. The ring gear is not held on with 14 bolts, but rather 12. As the name implies, this differential has 14 bolts holding on the differential cover. Debuting in 1973, this differential is a full floating design with a ring gear diameter of 10.5 inches (270 mm). Additionally, this differential is found on Chevrolet Express and GMC Savanna vans produced from 1973 to current day. No extra shipping charge for the Upgrades! This Kit Ships by FedEx in 3 heavy Boxes w/tracking.The 10.5” Corporate 14 Bolt Differential is a heavy duty differential found on many 1973-2013 Chevrolet and GMC trucks and SUVs, as well as certain versions of the Cadillac Escalade. We Sell the Best Disc Brake Conversion Kits in the USA! 2-Hub+Rotor Assemblies 6×5.5, Races installed, 1-1/8″ thick Rotor 2-Loaded Calipers, Specially Machined which means No Grinding! 2-Caliper Mounting Brackets, Multi-Position, 6 Bolt Mounting 2-SS Braided Caliper Brake Hoses, Vinyl Coated for added protection 2-Wheel Hub Seals 4-Wheel Bearings (Timken Bearings Optional) 2-Spindles and Spicer Mounting Stud Set, Grade 8 This Premium DISC BRAKE KIT features All New Parts! Complete Instruction Guide easy to follow w/Photos…. (Warn Hubs have less parts and work best w/our Kits)
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It is recommended that you install WARN HUBS or aftermarket hubs with this Kit. NOTE: For now you will receive Instructions for a F100 Disc Kit till we make new ones for the GM Kits. Only our Kits come with specially machined calipers which means no grinding on your knuckles. This Kit comes with everything needed to install disc brakes on your GM dana 44 front end. Open Knuckles: you can see the stub shaft u-joint from behind the knuckle.Ĭlosed Knuckles: you cannot see the axle u-joint from behind the knuckle. Most 1970’s + later have Open Knuckles……. Technical Info: Open Knuckles or Closed Knuckles?
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(See our other Listing for GM Kit for Closed Knuckles)