Re: Jumping out of 2nd gear
I certainly agree with JoeWay. Gasket thickness is all over the map. When initially assembling the clutch housing to the block determination of the gasket thickness and the thickness of the shims should be determined. All the bolts should be torqued down to determine how true the housing fits. This includes the bolts that go through the two ears. Either temporarily install the accelerator mechanism or use shorter bolts. You only need to check the allignment of the top 180 degrees of the housing. That is from the 270 mark to the 90 mark. The bottom 180 will be pulled into alignment when the bell Housing is bolted up. Before the bell housing is attached you can grab the bottom of the clutch housing and move it back and forth.
Many clutch housings have been whacked out of shape over the years and you might not be able to get a proper alignment. In that case you have to find another. Proper alignment is important as it could affect jumping out of gear and premature clutch failure.
I believe the spec allows something like a .006 difference across the top 180 of the clutch housing
Tom Endy
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