Originally Posted by camodown
Just your seal leaking. If it is not major I wouldn't worry about it. Go ahead and check the diff fluid level though. Should be able to open the fill plug and touch the fluid with your finger.
Driveshaft will have movement. Sounds like the normal amount.
Thanks, I checked the level. A little trickles out when I take off the plug, so that's OK.
Still, the hum is getting louder. Fluid levels in the tranny, transfer case and front diff are all OK; no burnt smell or discoloration. The U joint on the front driveshaft is looking a little rusty, can that cause it? Is there a way to check the joint at the rear of the shaft?