I have a slow drip coming off of the front u joint on the rear driveshaft. I can't see any fluid coming from the transfer case, but it may be because the shaft isn't spinning. You can see the fluid on the sheet metal where the shaft has flung it. I have replaced the rear output seal on the transfer case, and it still leaks. It appears that it is leaking where the drivshaft spindle connects to the ujoints. Is it possible the yoke is cracked and allowing fluid to leak. Please help me on this.