Newbie w? sick Tahoe :(

[NCBEACHTRUCK]

Hey all,

I Recently picked up a 98 Tahoe (1500) as a second vehicle. Got a steal on it but it really needed at first... After replacing the stereo, radiator, u-joints, brake lines, tires, an entire A/C overhaul (not fun...), auto tranny and g-box fluid changes we took it out on the beach this weekend, and wouldn't you know it- the 4WD is clickin & popping.

Everything worked ok at first, but then it started making loud noise above 3 or 4 MPH- sounded kinda like a bad C/V joint sounds when you accelerate a fwd car around a corner- except this noise was constant and didn't change with steering. Then the 4wd switch lights went dead, it wouldnt change modes, and the "service 4wd" light popped on. After I got it off the beach I ended up pulling the x-fer case fuse and when I put it back in the svc light was out, the 4wd switch lights worked, and I could finally get it back into 2-hi for the run home.

So doctor(s)... how bad is it?

 

[steamroller]

Could be the Cv's and that would be the 1st thing I would check
Then the encoder motor on the t case, maybe doesn't have enough guts to get it completely into 4wd
Then the dash switch
Then the transfer case control module
The chain may also have some slack in it but it's not likely

 

[992door]

where in NC are you?

 

[xX Mavr1ck Xx]

My went through some of the same things, kinda sound like its grinding? I ended up having to replace the transfer case..

 

[lowAZhoe]

probably encoder motor