3500 no Locking Rear Differentiall?

2 messages, Last post on May 16, 2009 at 11:35 AM

#1 of 2 3500 no Locking Rear Differentiall? by dave622 May 10, 2009 (4:53 am)
I'm trying to compare the 2500 and 3500. I don't see the optiion for adding a locking rear differential on the 3500. Does this come standard, do I not want one? I'm planning to plow some steep hills with whichever truck I get...any words of wisdom would be appreciated.
#2 of 2 rear end niose by svetter May 16, 2009 (11:35 am)
I have a 2006 duramax with allison. At 62-64 mph your hear a lound grinding noise coming from the rear of the vehicle. I have change to carrier bearing and the u-joints it is not a wheel bearing. I need help. Same noise all the time and at the same speed. noise does not change and speed does not change any ideas