{"product_id":"chassis-engineering-bolt-on-rear-end-kit-for-1940-chevy-car","title":"1940 Chevy Car Bolt On Parallel Rear Leaf Spring Kit - Chassis Engineering","description":"\u003cp\u003eThe \u003cb\u003e1940 Chevy Car Bolt-On Parallel Rear Leaf Spring Kit (AS-1020CG)\u003c\/b\u003e by Chassis Engineering provides a complete rear suspension conversion for 1940 Chevrolet passenger cars. Designed as a direct bolt-on replacement for original torque-tube setups and obsolete factory springs, this kit accommodates modern open-driveline rear axle housings up to 3\" in tube diameter and is engineered around a recommended 58\" to 60\" rear track width.\u003c\/p\u003e\n\u003cp\u003eBy pairing 2-1\/2\" wide slider leaf springs with matched gas shock absorbers, this package modernizes rear-end handling, absorbs road noise, and improves overall ride stability.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Design Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFactory Hole Alignment:\u003c\/b\u003e Front and rear spring mounts bolt into existing factory bracket holes once rivets are removed, streamlining frame installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e2-1\/2\" Parallel Slider Leaf Springs:\u003c\/b\u003e Uses wide leaf springs equipped with rubber bushings to absorb road harmonics and permit natural suspension flexing without harsh vibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCross-Frame Upper Shock Crossbar:\u003c\/b\u003e Transverse mounting tube fits securely between the frame rails above the axle centerline.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eReversible Lower Shock Retainers:\u003c\/b\u003e Lower shock plates can be mounted angled up for standard ride height or down for lowered\/lowrider applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eComplete Hardware \u0026amp; Shock Package:\u003c\/b\u003e Includes gas shocks, shackles, spring pads, U-bolts, mounting brackets, and grade-8 hardware shipped in 3 boxes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification Matrix\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature \/ Metric\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eManufacturer \u0026amp; Part #\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eChassis Engineering (P\/N: AS-1020CG)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eVehicle Application\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1940 Chevrolet Passenger Cars\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eRecommended Rear Track Width\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e58.00\" to 60.00\" Wheel Mount Face Width\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eMax Axle Housing Tube Size\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUp to 3.00\" Diameter Axle Tubes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eLeaf Spring Dimensions\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2-1\/2\" Wide Parallel Slider Springs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eUpper Shock Bar Reference Point\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e28.00\" Reference Measurement Frame Mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eShock Damping Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGas-Charged Shock Absorbers Included\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003ePackaging Configuration\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eShips complete across 3 separate boxes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eStep-by-Step Installation Summary\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eTeardown \u0026amp; Factory Bracket Removal:\u003c\/b\u003e Remove original rear axle, leaf springs, and shocks. Carefully remove factory rivets at front and rear mounts to preserve original frame mounting holes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFront Mount Setup:\u003c\/b\u003e Clamp front mounts to the frame with tabs facing toward the rear and inside. Temporarily attach leaf springs, axle housing, and wheels\/tires to visually check for wheel centering within the fender opening before final 3\/8\" drilling and bolting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRear Mount Setup:\u003c\/b\u003e Bolt new rear mounts using original frame holes (drilled out to 3\/8\"). Verify clearance around the gas tank flange to avoid rattles. Shackle mounts face toward the rear and inside.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eUpper Shock Mount Crossbar:\u003c\/b\u003e Clamp upper shock bar between frame rails using the 28\" reference dimension as a starting point. Verify body\/floor pan clearance before drilling 3\/8\" frame holes and bolting in place.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSpring \u0026amp; Axle Assembly:\u003c\/b\u003e Bolt leaf springs into place using rubber bushings up front and shackles at the rear. Position axle over spring pins (removing the Nova-style center pin spacer if unneeded for your axle housing).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eLower Plates \u0026amp; Shocks:\u003c\/b\u003e Install U-bolts, lower shock retainers (with shock studs pointed forward to the center and facing the rear), and gas shocks. Torque all fasteners.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cblockquote\u003e\n\u003cp\u003e🛠️ \u003cb\u003eImportant Tech \u0026amp; Break-In Notes:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSpring Settling:\u003c\/b\u003e New leaf springs naturally drop up to 1\" within the first 500 miles of operation. Arching flat, slightly upright, or slightly reversed under vehicle load is normal behavior.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFrame Snubbers Required:\u003c\/b\u003e Ensure suspension travel bottoms out on rubber frame snubbers (such as Chassis Engineering AU-0082, sold separately) rather than fully compressing the shock absorbers to prevent shock body damage or shaft breakage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBushing Material:\u003c\/b\u003e Rubber bushings are required to absorb road noise and provide proper lateral flex; solid or hard polyurethane bushings are not recommended for this suspension geometry.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/blockquote\u003e","brand":"Chassis Engineering","offers":[{"title":"No","offer_id":39364704796804,"sku":"CEI AS-1020CG","price":1102.0,"currency_code":"USD","in_stock":true},{"title":"Yes","offer_id":39364704829572,"sku":"CEI AS-1020CG \/ SB-1040RA","price":1343.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0286\/1180\/5316\/products\/AS-1020CG-1024x683__76725.1610654060.1280.1280.jpg?v=1621999129","url":"https:\/\/hotrodhardware.com\/products\/chassis-engineering-bolt-on-rear-end-kit-for-1940-chevy-car","provider":"Hot Rod Hardware","version":"1.0","type":"link"}