>Ok here it is. 57 Chrysler/Imperial service manual, #D15899. Section II >REAR AXLE, pg. 46 paragraph 16. SETTING AXLE SHAFT END PLAY. The first >paragraph talks about the various shims available and states "The correct >axle end play is .013 to .018 inch. One or more shims may be required to >obtain correct end play". Gary, My closest source for 1957 cars is Motors Manual, 1962. It shows in specs .013-.023 and a foot note to set to .018. The word how to section stays with this spec from 1957 to 1961 with special note about why the need for end play (heat expansion of axle shafts). I looked in a 1964 Motors and it wanders off into deep discussion as to equalizing shim packs side to side to center thrust block which is a subject the '62 book does not mention. Spec stays the same at set to .018 up through 1964. Switch from .003-.008 to .013 to .023 would seem to be for 1957 MY Chryslers. I don't remember setting up Internationals that loose so checked manual and spec is .001-.009. Surprised there has not been some posting as to what happens with a Chrysler set at say .006 that should have been .018. Warren Anderson Sedona,AZ