I havent had my front driveshaft in for about a year now due to wered vibes I got with it installed.
It was a long tedious process that involved a front axle rebuild as well as a brandnew tom woods front driveshaft AFTER i had the factory one rebuilt/balanced/given a blessing by a driveline shop.
The only thing that hasnt been looked at yet is the front output shaft on my np231 transfer case. I just examined it from the outside and it has around a millimeter of play forewards to backwards in the t case.
Is that normal? I know even less than a mm of play in a ujoint shall cause vibes. the yoke dosent seem to have play up or down, just back to forwards. I may have messed up the install when I installed the SYE a couple years ago (I didnt have front DS vibes until after i regeared from 3.08 to 4.56.. the increased DS speed began the vibes at speeds about 50 mph) So the front output yoke may have been loose or whatever for 2 years but just didnt spin fast enough to cause troubles with 3.08 gears.
Does the front output shaft of the np231 utilize a crush sleeve? If so, I dont ever remember crushing one on install. If there is no crush sleeve, what should the front output shaft be torqued to?