I have some new gears coming in, and cannot get access to a dial indicator for a week or two. Pinion preload is set andall i need to do is set backlash. I MUST have my truck this week and cannot afford to have it professionally done. What should I do? Just set it as close as i can? (The gears need to last a maximum of 1500 miles, probably only about 500.) What will happen if i do this? Will things be ok as long at preload is ok and there isn't an absurb amount of slop? Help.