Im new here so any advice would be great. I recently put on a set of pacer 16x10 wheels with 3.5 offset. After a few hundred miles I noticed a knock coming from the rear of the truck but it is only noticable between 20 and 10 mph and when decelerrating. Its nothing rolling around and ive taken it to a few shops and they cant give me a definate answer. I have a feeling it might be the limited slip or something in the rear end. I just wanted to know if anyone here knew what it could be or if yall have experienced the same problems. The truck is a 2000 F150 single cab 4x4 with half cranked t-bars and a 5.4 with manual transfer case. Any insight would be great. Thanks in advance.

 

Do you still have the old rims and tires if so put them on and listen see if its still doing it then go from their that will help you some if you think its the rear end drain the oil and see what it looks like also check your u joints

 

And if it has rear disk breaks check to see if the clip is still in the break caliber always knock out the little things First

 

I have put the stock wheels back on just to see and the same problem persisted. I will check the brakes when i get home to see what they look like. The joints are fresh. That was the first thing i changed out. I really think it may be in the rearend but im really hoping not. Thank you again for the advice.

 

Wish you the best of luck and hope its not the rear end either

 

Check the leafs and the the shackles to inspect all of that stuff even the shocks anything can happen,,

 

The noise has a very hollow sound almost like a metallic thud. My springs arent exactly pretty but it makes this noise even if the road is completely smooth. Looks like a tear down and some 4.10's with be coming soon. A bearing in my rearend is also acting up so I might as well do a few upgrades.