Glad to hear you were OK, mot!
I believe you made a good call in the last post. 4 years is well within usable life for these tires - In fact, mine (also Dueler AT) are at least that old; and I'm not a bit concerned with them at all.
Hope all is well with ya!
Is there any changes in the OEM part numbers provided above? I get a voucher from last alignment job that I'd like to use at my local dealer. However, I was handed a pair of identical parts for both sides of my truck, which I walked away as my original ones are surely different...
Grease contaminated front diff fluid is normal on a stock truck. If you haven't done the diff breather mod, do it now (or at least remove the rubber flap on the breather valve). My diff fluid was in much better shape after doing this.