I have a 1991 K5 Silverado. When getting it ready for winter my dad noticed it has to much play in the front driveshaft. I belive it is the solid yoke type, it is a two piece driveshaft. I know the two pieces are suposed to move in and out, but mine can also move about 3/4" in any direction. I assume it is normal wear since the truck has 230,000 miles with no work ever been done on the 4x4 system. The question is, can this be fixed or does it require a new driveshaft? It seems like a straight forward swap, but are there any tricks/tips I should know about changing the shafts? Thanks for any help.