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Before: After a solid-axle conversion and a 9-inch suspension lift, our late-model Chevy's driveshaft yoke was binding against the pinion yoke at full droop. Since the front driveshaft wouldn't even turn, we ground the pinion shaft to eliminate the bind. Sure, we could have reindexed the front axle, but remember that substantial reindexing adversely affects the ability to align your vehicle, namely in regard to the caster adjustment. If you're having a front axle custom built, you probably won't need the Super-Flex U-joint because your builder will factor in the amount of lift your vehicle has and install the axle "Cs" in relation to how much reindexing is required. This will help your front axle retain its alignment adjustability.