Drivetrain noise

[1992gen1_fan]

My truck started making a loud sound under load the other day. Looking for input before I take apart more than I need to looking for the source. Sound familiar to anyone?

1st vid at Low speed around 20 mph, 2nd vid accelerating up a hill
http://m.youtube.com/watch?v=ndMCuxmeP4g
http://m.youtube.com/watch?v=K-YQ8YeBaGY

Any input would be helpful, thanks

[1992gen1_fan]

Today I had time to look at a couple things. The crank shaft has about 1/16" play in and out and the lower shaft in the getrag has a good 1/16" of play front-back and up and down.

Maybe that's what's making the noise?

[1992gen1_fan]

Getting ready to go ahead and drop the transmission.

[1992gen1_fan]

Found a couple pinion gear teeth in the bottom of the rear diff so the sound probably wasn't the transmission after all.

[1992gen1_fan]

Since there is some play in the bearings in the transmission I'm going to order a bearing/syncro's kit and put them in while the transmission is out.

[1992gen1_fan]

Just an update, I rebuilt the getrag since there was a little bit of play in the counter shaft and just a little in the main shaft. That's not what was causing the noise but just a matter of time and it probably would have been getting noisy. Got fresh cone bearings, syncro's, seals and an input shaft. The needle bearings still looked good.


Also, a mechanic told me since the rear diff went out, to check the syncro's in the getrag. He said when a diff goes out it can take the 3rd gear syncro's with it. Anyone else heared this? Makes sense but I never heared that until recently.