Racers Rear End 1963-79 Corvette 2 year total replacement $2975.00
"One and done." That's what you want when you replace your Corvette rear end.
The Corvette rear end is the last thing you want to deal with. The original rear end supported a few big motors but lets face it nothing like your motor with 200 more horsepower over the original motor. There wasn't a Corvette that had a 3000 plus rpm converter and those rear ends just don't hold up the stock manual transmission. Fifty plus years of abuse on your rear end plus a ton more horse power and your looking at a disaster waiting to happen at the most inopportune moment. How embarrassing as you hopefully coast safely off to the side of the road. Our rear ends are completely rebuilt with all new bearings, seals, and clutches, That would be a stock rebuild. We are actually do a build. Not a rebuild replacing old parts with new parts that have the same problems.
The Dragvette build is much more involved. With machining, hand fitting, and parts that are custom manufactured to our specifications to create a trouble free rear end. One and done. The only part that is original is the housing and that's modified to improve it's strength. We hand fit a billet steel bearing cap on the ring gear side of the rear end to minimize flexing plus a larger cap screw is bored and tapped. We replace the old 17 spline side yokes with Dragvette's our own 30 spline inner axles. They are made of Hy Tuff material and hardened through out. Hy Tuff is the toughest material on the planet to take a shock. Our inner axles handle 1000 hp applications no problem. They are larger in diameter with a 30 tooth spline. The 30 tooth spline isn't cut as deep as a coarser 17 spline. That leaves more meat in the already larger diameter inner axle. The larger diameter inner axle requires machine work on the carrier housing. A used or brand new carrier may be installed. It's your call a new carrier is an additional upgrade.
We also install hardened 30 spline spider gears to match the inner axles. A .050" larger diameter hardened cross pin is also installed to support the spider gears. A brand new "US Gear" ring and pinion with your choice of the following ratios 3:08, 3:36, 3:55, 3:73, 3:90*, 4:11, 4:33, 4:56. We use this brand because it is U.S.A. steel and manufactured in the U.S.A. with American quality. The rear end is assembled with the most aggressive driver in mind. The back lash is set to the minimum tolerance to insure the shock of a standing start or hard manual shift will not damage the unit. The drive flanges will bolt up to your current half shafts with no modification.
Our posi trac unit will easily handle 650 Plus Horse Power with a full 2 year from date of purchase full replacement warranty. Our spool unit is in a 1000 HP Corvette and with zero failures to date. You must use Lucas or Valvoline 85-140 rear end lube non synthetic and a lubricant package for posi-trac clutches. Synthetic lubricants void warranty. Free Shipping in 48 states. No core charge. (250.00 upgrade for brand new carrier housing 3225.00)
Here are some formulas to help you determine your best gear ratio for your use. These formulas are not for overdrive transmissions and you should allow about 10 percent slippage for a non-locking converter. Order early if possible it it commonly takes 4 weeks to receive a rear end if it is not in stock.
Talk to Steve at 877-422-0943 toll free to discuss the purchase. $1,500.00 required on ordered date remainder on shipping date.
Current inventory none. Some in process.
To determine what RPM you'll be at for any given gear ratio and tire diameter:
MPH x Axle Ratio x 336 -- Divide that number by the Tire Diameter
To determine what speed you'll be going with a given tire diameter and gear ratio:
RPM x Tire Diameter -- Divide that number by the Axle Ratio x 336
To determine what axle ratio you'll need for a given speed and tire diameter:
RPM x Tire Diameter -- divide that number by the MPH x 336
3:90* This ratio is not available in a US Gear brand.