LAR1AT

will do ill keep updating this post until i hopefully figure it out. thnks!

VTX1800N1

Just bought my truck in November and I have the same issue. I've narrowed it down to the left rear wheel. I need to get my wife out to shift the truck between drive and reverse while I look for the source. Anyone know where I can find all the torque specs for the spring mounts, shocks, brakes, etc?

LAR1AT

VTX I went across your post the other day! good to hear from someone with the same issue, bad that we have the issue though of course. So its nothing with your trans? I keep hearing/reading it could be the U-joint...

VTX1800N1

I'm fairly sure it isn't on my truck. I don't hear it at all unless the service brake is applied, and it seems to go away once the truck has been driven for several miles. My bet is that it's in the drivers rear brake. Probably need to grease the caliper slides/pins. Haven't taken the wheel off to look at it yet.

alsatropine

iTrader: (2)

That is probably your issue. I had the same issue. I did a full rear brake service and the issue when away. It will come back maybe because the rotors tend to rust a little bit if the vehicle sits for a couple of days with high humidity or rain. Its not just the F150s. I have 2 2010 E350 V10 Ambulances what had the same issue. Just make sure to regrease your slide pins real well and use the anti squeal grease on the back of the pads.