You could put it on extremely sturdy jack stands and try to find the noise. I do not suggest climbing under it. They do fall off sometimes and Id hate for someone to get hurt. You need to isolate the noise so they can help you (because I probably can't lol) everyones throwing guesses from the front axle to the tranny to the transfer case and they're all different. I hope that didn't come out harsh I'm just trying to help you out. When my truck made random noises I was also suggested the tc but after I put it on jack stands it was clearly the front axle. Luckily I didn't have to shell out 600+ for a tc. I was already shopping for one because I thought that was the problem lol.

 

Ok ill check out all your guys opinions and see where I get. Thanks to all who have helped me get this far, I'd be stuck if it wasn't for u guys.

 

Yes I pulled rear driveshaft off to check the snap ring on back of t case and I left my driveshaft off. Put in 4hi and backed out of the shop with no noise.

 

When the shaft was out, did you leave it in 2wd and listen?

 

No its still off should I put it in 2wd and put in drive and try to listen for noises?

 

I put it in 2wd and didn't hear really anythin unusual.

 

Ok all thats good to hear, I guess the question is know, Who was playing with your stick! You have checked all the important stuff go for a short drive and keep your ears open for any grinding or a binding feeling in the truck.

With the drive shaft out check the pinion yoke for play.

 

I know we are asking you to do lot's of work, but why not pull the rear diff cover and do an inspection at this time as well. Does your truck have a factory lsd?

 

I don't mind doin the work so I can figure what I need to do before I break more sh*t. LSD? Is that limited slip? I do have factory limited slip. When I bought the truck year ago guy said he had rearend rebuilt before I bought it.

 

Let's check it, new gear oil will need the lsd additive to be added. Jack the truck up; with the truck jacked up grab the tire and check for movment side to side up down, then take the tires off and pull the diff cover. Look at the disc packs behind the side gears in the carrier, check for play in the side and spider gears as well. Factory lsd love to blow up; I will keep my fingers crossed for you.