Thats what i get trying to launch a 3700lb car on slicks with 308,s and a stock rear. (8.5" 10bolt). The tires,slidelinks and clutch all worked good but the rear said no!!!. The rear u joint ripped out of the straos and punched a 2" hole in the floor. The pinion yoke hitting the floor when i was beening towed of the line was a devestaing noise. All this with just a bolt-on lt1 and a m6.