01 transfer case noise

[Blackout]

I was driving the tahoe to work a couple weeks ago and hit some snow so I engaged 4hi and heard what sounded like the cv shaft flopping around hitting stuff. I put it back in 2wd and it went away. When I got home, I checked it out and when it's in 4hi and you hit the gas, the noise sounds like it's coming from the transfer case. I check the driveline and it's fine. I guess I'll be pulling the transfer case and splitting it apart to fix it. Anyone else have this issue?

 

[Blackout]

I just looked again and there is a lot of play in the front shaft but not at the ujoints. It feel and looks like it's in the rubber boot between the ujoint and the transfer case. What is in that boot? Is it just the output shaft?

 

[Blackout]

Anybody have any ideas? I remember last time I took it wheeling that it made that noise in 4lo, now it does it in 4hi too.

 

[Blackout]

Now 4hi doesn't even work, just makes the noise and the rear tires spin. Anybody? I know I'll have to pull the t-case but any info will help.

 

[brodg]

most likely the chain in the transfer case has play in it and it is skipping

 

[boostaholic]

No it sounds like the front cv is shot, remove the shaft and have a driveline shop replace anything necessary. Did you replace the front shaft when you did the lift? I replace the shaft on those trucks with a dual cardon cv front shaft 90% of the time otherwise they vibrate on the highway.

 

[Blackout]

I bought it already lifted and the shaft looks stock. You think it's the splines inside the shaft that might be worn cause it to spin and make noise?

 

[boostaholic]

The splines would self destruct long before you could check it. I'd bet the CV is bad, take it to a driveshaft shop and have it rebuilt or buy a pro comp 51246 cv front shaft.

 

[Blackout]

I'm sorry but when you say cv, I think of the front diff cv's to each wheel. Are you talking about the shaft from the tc to the front diff?

 

[boostaholic]

Yes the continuous velocity joint in the front driveshaft going from the tcase to the front differential