Strengthening The Rearend From An LS1 Firebird Formula - Maximum-Effort Fourth-Gen10-Bolt
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The pinion gear was set up in an Arcan 20-ton press to remove the pinion bearing. After attaching the bearing separator, the bearing was pressed off and the factory pinion shim examined. It is vitally important, even if using new gears, to separate the pinion bearing in order to determine the thickness of the shim, as this is an excellent starting point for reassembly. In this case, a micrometer determined that the shim was 0.033-inch. On average, the 10-bolt uses between 0.030- and 0.034-inch shim thickness. Differences in the shim size are necessary to compensate for minute manufacturing thickness deviations in the inner pinion-bearing race and housing. View Related Article
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