Housing and Axles These bolt-in rear axle packages are designed to replace the original '68-'72 GM A-Body rearend housing and are compatible with the stock 4-link trailing arm rear suspension found in your Chevelle/Malibu/El Camino/Sprint/GTO/LeMans/Tempest/F85/Cutlass/442/Special/Skylark/Gran Sport. The major advantages gained by upgrading to a Ford 9" axle include: Greatly increased strength (reliability) The variability of the housing to accept almost any gear ratio from 2.47:1 to 6.14:1. A drop-out third member for ease of service. Steel axle retainers which keep the axle/wheel in place in the event of axle failure. If you're upgrading your rear end and axles though, why stop there? This kit also includes everything you need to convert your stock rear suspension to a coil-over suspension with a QA1 Coil-Over Conversion Kit. QA1's kit includes specifically designed mounting brackets and single adjustable aluminum shocks for the 1968-72 A-Body with all hardware included. To round it all out we have also thrown in a new sway bar, new trailing arms (with hardware), and new trailing arm mount braces. Give the rear of your car the upgrades it deserves! Just add the third member and brake kit of your choice (both sold separately) to complete your installation. Kit includes: 990-06872 Speedway Ford 9 Inch Bolt-In Rear End Axle for 1968-72 GM A-Body. 721-52340 QA1 RCK52340 Rear Coil-Over Conversion Kit, 1964-72 A-Body, 150 Pound. 916-6472.1 64-72 A-Body Trailing Arm Hardware. 916-6472.2 64-72 1.125 Inch Rear Swaybar. 916-6472.L 64-72 A-Body Heavy Rear Lower Trailing Arm, Left Side. 916-6472.R 64-72 A-Body Heavy Rear Lower Trailing Arm, Right Side. 916-6872 Trailing Arm Mount Brace, 1968-72 A-Body, Pair. (2) 916-1968.1 68-72 A-Body Adjustable Upper Arm. Differential As featured on Classic Truck’s Week to Wicked. Watch the transformation here! Assembled by Professionals Hand-assembled by trained experts in-house, our Ford 9-inch third members are built from quality components with an exact step-by-step process. We bring this combination of precision assembly and quality components to you at a price that can’t be beat. We trust these third members so much, they’re the go-to choice for our own rides, from the street to the track. Tough, Nodular Iron Center Section Our Ford 9 Inch Nodular Iron Third Member Center Section Carrier starts with a NEW casting with over 4 lbs. of additional material in critical areas. Nodular (ductile) iron is much more resistant to fracturing than OEM “gray” iron. Extra ribbing reinforces the case and rearmost pinion support (pilot bearing). Thick, forged steel bearing caps surround the carrier bearings, all securely held in place with precision Grade 8 cap screws. The improvements continue with rugged billet steel adjuster nuts and heavy-duty keepers to ensure your ring gear settings are maintained. All mounting surfaces are precision machined to ensure a consistent, flat surface for a positive gasket seal (no more leaks on your shop floor). An oil fill plug is included. Precision Assembled for Proper Ring Gear Teeth Pattern Getting a proper pattern on the ring gear teeth is crucial. Our time-proven, step-by-step process ensures the correct backlash, preload, and proper amount of pinion shims to ensure the correct pattern on the ring gear teeth. Our gears use use cold-rolled 8620 steel, known for its long-wear and durability. To ensure a proper gear pattern, we use a stronger “Daytona” style pinion bearing support to maintain that critical pinion depth setting. Stronger due to its larger bearings, our Daytona pinion support also uses the spacer-and-shim setup to maintain critical pinion depth settings under high load, unlike traditional crush sleeves which often compress further, take out your preload and lead to failure. With solid bearing spacers and the proper shims, we eliminate this problem and make setting preload easy and repeatable during installation, service and gear changes
