Now the proper pinion angle must be reestablished. Using a scaled pinion angle measuring tool, take an initial measurement from the bottom of the engine's crankshaft. Placing the tool on the lower pulley will work fine. Whatever the angle is, the pinion angle on the rearend needs to be set to the opposite. If the crankshaft angle is 4 degrees positive, the rearend pinion angle needs to be 4 degrees negative.
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