I kept hearing a grinding noise when I would back up and turn at the same time, also mostly happened when it was cold out. I took off the skid plate and noticed the gear box was showing some gear which did not look normal to me. I researched and so far ppl say its not a big deal it was just a dust shield. so far I just put grease on it and problem solved but I need to get an alignment and I rather get the problem fixed if there is one before I get the alignment?


2006 h2 hummer about 90,000 miles
love the truck gas is about 12mpg average

 

those splines showing is normal. Gear box shouldn't care if you are backing up.

I can't hear the grinding so I'll make some guesses:
= Make sure tires are not rubbing on plastic inner fenders,
= grease all fittings on steering parts,
= check front hub bearings - mine went out at 95k and would grind if bad - keep an eye on this anyway. Get Timken off Amazon, best and cheapest there