Posted by Paul on Sunday, October 22, 2000 at 18:50:48:
In Reply to: I FINALLY have time to start working on my truck.. posted by Tim Way on Sunday, October 22, 2000 at 17:32:48:
The little vent is to let moisture out (and often in) of the differential housing. The gears get pretty warm and any moisture in it will cook out. It doesn't replace changing the gear lube occasionally but it helps.