I've noticed since I bought the truck [01-05] that when getting off the throdle and the rpms get to 1250 and I give it just enough throdle to maintain speed I get a rumbling / vibration that only happens between 1200-1250 with slight throdle, not sure if this is norm , no change since I bought the truck and noticed the symtom. I'm 23,000 and the truck looked well maintained and from what you can see from the out side its stock but the HP is not , I found out that the TQ has been replaced. I forgot to mention that I replaced every u- joint the truck has including the CVC.
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