[youngbuck90]

i own a 1995 gmc k1500 5.7 and here recently ive had this odd pinging noise in the rear end of my truck. The only time i can hear it is when im above the speed of 45 or so. The noise does somewhat speed up as the truck does. I went up under it and checked the driveshaft to see if the u joints where going out but i didnt get them to move at all. I was just wondering if by some chance i was missing something or what not. The truck has 200k miles on it, nothing on the rear end has ever been worked on. So i guess its around that time for something to happen, but never pulled into anything bigger then 285s and its not lifted.

 

[Crispyt]

Could be axle bearings. Check those first. It could be causing the tires or something in the axle to rub at certain speeds. Does it change when you turn? It could be your spider gears that worn out a little so they have to much play in them. A co-worker had a problem like that in his Ford truck and it was the spiders that wore out to much. I would just take it easy on the truck until you know what the problem is for sure so you dont blow the rear end apart. To much play in it can cause it to blow apart if its to lose.

Good luck!

 

[list9782]

my truck did that too, the whole rear diff had to be replaced. wasnt a hard job, just took a lil while since i didnt know what i was doin at first. grab your rear tire and shake it really hard, if you hear some knocking thats gonna be your best bet. like i said thats what my truck did

 

[kawierider1990]

This also could be that your main gear in your rear end has a gear chipped or broke off. I just had to replace my whole rearend cause i had three teeth broke off on my main gear. It sounded like someone had a jackhammer running underneath my truck! Hope this helps. the way to check it will be to remobe your rearend cover and just check it out

 

[rman81]

I had the same issue in my 96 1500 W/T. Turns out the bearings were fried. I went to a salvage yard and swapped the whole rear. Took about 8 hrs to do but havent had an issue since.

 

[youngbuck90]

well i did end up being the whel bearrings, but i had to replace the whole axle. some how i chiped a gear and i guess the shaving over time worked there way to the bearings. good thing is a put a 3/4 ton under it so hopefully all will be good thanks for the help!