The shim or shims on top of the steering knuckle are used to adjust the vertical play. It should not exceed .005" . Generally you can feel play at about .005" between two parts but less than this you can't. If the play or clearance is too large, the bottom bearing will be damaged by the pounding that will occur. The bearing races are very hard and brittle.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!