yoke change 489 case w/o disassembling

YOU CAN MARK THE PINION NUT AND COUNT THE TURNS WHEN REMOVING IT BUT THAT IS NOT ALWAY ACCURATE BECAUSE THE NEW PINION MAY BE A LITTLE DIFFERENT THICKNESS AND BY TIGHTENING THE NUT BACK TO THE ORIGINAL SPOT IT MY BE TO LOOSE OR TO TIGHT.
ALSO SO THERE IS NO REAL TORQUE SPEC LIKE 310 FT LBS. THEY MEASURE THE TORQUE BY THE AMOUNT OF INCH POUNDS IT TAKES TO TURN THE PINION NUT WITH NO RING GEAR INSTALLED AND JUST A LITTLE OIL ON THE PINION BEARINGS.
IT REALLY COMES DOWN TO A FEEL YOU WILL KNOW IF IT'S TO TIGHT BECAUSE OF HOW HARD IT IS TO TURN BY HAND. YOU COULD TRY MEASURING IT WITH A TORQUE WRENCH BEFORE YOU REMOVE IT AND THEM SLOWLY TIGHTEN IT UNTIL YOUR TORQUE READING IS THE SAME. I USE AN OLD BEAM TYPE INCH POUND TORQUE WRENCH FOR THIS NOT A CLICK TYPE WRENCH