Quote:
Originally Posted by AC-460
The biggest problem with a bearing is you cannot lock the centre of the bearing to the gearbox shaft. This can result in the shaft turning on the inside of the bearing and as the bearing is made of high carbon steel and the shaft of alot softer material you will wear the shaft on the nose. Stick with a Brass spigot it will cause you less problems
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Rather than covering up the problem with the bellhousing not being centered to the crankshaft, dial indicate the bellhousing. If should be whether you use a bushing or bearing . . . I recommend the bearing, but either will work fine. If the bellhousing is off center, use off-centered dowels to center the bellhousing. They can be rotated to shift the bellhousing in the direction needed. If the bellhousing is not too far off, say 0.010 inch, retain the bellhousing with two bolt snugly tightened, then whack with a dead-blow hammer in the direction needed and repeat the dial-indicating process.
Keep in mind that an offcentered trans-to-engine will "wrench" on the transmission input shaft and bearing, causing the shaft to wobble. A worst-case scenario would be a transmission that jumps out of 4th gear.