For the unven wear pattern, could the ODPA be set carefully into a vise, and then using a dial indicator, rotate the shaft looking for run-out tooth by tooth? Maybe even top and bottom of gear?
Right now, all my tools are in storage, too far away to be of use.
Jean - Wonderful wife
2003 Toyota Sequoia
2005 FA64 (aka LJ) Khaki
Heidi - Golden Retriever/Jeep Dog