Join Date: Dec 2008
Location: Wichita, KS, USA
Final Drive Shim Thicknesses
I've been reviewing final drive threads and trying to decide whether to do a preemptive rebuild. I'm at about 43k, with no service records from PO(s). So I don't know if it has ever had an issue.
Last oil change had a fine coat of metal particles on the magnetic plug, but nothing too concerning (no obvious fragments).
Watched CharlieVTs video again (nice work, thanks!), but wondered whether anyone has tried to use crushed solder or lead as a method of measuring the gap prior to shimming. Searched the site, but nothing turned up.
It appears to be used by some shadetree mechanics in checking tolerances for differential rebuilds (which fits my description, I once overhauled a truck engine after pulling it with a
come-along chained to the ceiling joist in the garage and rolling it around on the floor to get to the top and bottom ends).
Method would be to assemble the drive with soft lead shot or solid core solder in the gap and torque to spec., disassemble and measure the thickness of the crushed lead. It would be similar to using Plastigage, but instead of measuring the width, would just measure the crushed thickness.
Might not be any easier, but would seem to be an alternate method for those of us with more fishing shot than dial indicators.
K1200LT '00 for Touring, '73 Norton for fun