Excellent info Mr B!
Recently, experiencing loud humming from the rear, gets louder with speed. Guessing it's a rear diff issue and I do have a laser thermometer. Any tips on diagnosing possible failures?
The guy's I've been getting used impreza parts from could surely help me if the diff does need replaced. Which imprezas diffs match the xt auto diff and is there any upgrades to consider?
Thanks in advance