I'm replacing the seal behind the rear pinion yoke. Everything came apart fine but as I was checking the fitting on replacement parts I noticed the threads at the end of the shaft which the yoke gets bolted on to are bad. Is this fixable with a die or some other tool? I'm hoping the rear axle doesn't have to be disassembled. If I can clean up the threads what is the thread pitch or any other relevant info for this? Thanks in advance for any info!