Originally Posted by
gtopite1
Also, has anyone kept the stock rear-end and changed the gears? I was told it was possible to put different gears in the stock rear-end, but have no definite answers.
Not sure what vehicle you are building. However, as far as upgrading a Buick torque tube rear axle: any differential from 1941 to 1955 will interchange within the same year range. The axle splines are the same for those years. Be aware Buick pinned the inner propeller shaft to the pinion gear, and the splines are an interference fit. IE, they boiled the female splines of the shaft in oil, and froze the pinion shaft male splines. Slid the twain together and inserted the pin. If you are not careful you could damage these parts while separating them. If you find a complete torque tube axle assembly that's the same width as your vehicle's, and its torque tube is the same length, consider swapping one assembly for the other. The Buick axle housing comes stamped on its bottom with the numbers of the ring and pinion teeth. Removal of the rear inspection plate will reveal what's actually inside, the ring gear (crown wheel for commonwealth blokes) is stamped with the number of teeth on it and its associated pinion gear. Just do the division to determine the ratio.
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