Hello all -- I just picked up a used 2005 explorer with around 56k miles on it. I have a couple of issues with it already though. First issue is intermittent turn signals but that shouldn't be too much trouble to diagnose and repair (i have a 60 day/3000 mile warranty). The second is a sort of grinding noise that sounds like it could be coming from the rear axle but is difficult to pinpoint. Symptoms: -- This sound sounds like metal on metal grinding but I'm no expert. -- Only present while on the accelerator. If i let go of the gas it goes away, and if i feather the gas i can make it come and go. -- Sounds like it is coming from the rear of the truck, but sometimes I feel vibrations under my feet which may or may not be unrelated. I did some searching around and found that there is a service bulletin for a rear axle replacement kit, so I'm wondering if that's it? I bought from a used car place but they are sending me to the dealership to get the door code read out so I think I'll see if i can get them to check the noise as well. Thoughts?