I've been driving my FJ62 around in the ice and snow lately and I notice some vibrations and noise when I let off the gas while in 4wd. Anyone know what causes this? It seems to do it when there is no torque load on the drive shafts like when I'm coasting. If I drop the tranny down to 2nd and back drive the engine the noise goes away. I rebuilt the case when I did my vortec converstion about 1500 miles ago. Maybe I put something together wrong My T/C is a little forward of the stock position. I also did a SOA so my front axle is vertically farther from the case then normal. I am not running any cv's on either drive shaft and the front one is the one I took to a shop and had balanced and straightened. The rear was just welded up an run as is.