I was reading up on the thump or clunk on my 03 GX470 and I noticed there's quite a number of owners experiencing this. I wonder if anyone can tell me if this is a factory warranted repair or will the owner have to pay for it. Around how much should I save up if I have to pay for it. I Have about 134,000 miles on my GX and lately I have noticed the thump. It's as if someone hit me from behind. Thank you in advance on any advice and or comments.