Noise Diagnosis
 

Since off-road trip last weekend I have noticed a strange beating noise (think shusch, shusch, shusch etc - like dirty bearings??) which occurs only when I let off the gas tocoast or slow down. The noise is only heard between 1500 and 1000 rpms (typical coasting rpms I guess) and seems to be transmission or drive shaft related. If I put the vehicle into neutral the noise dimishes significantly. If I drop back into drive (without accelerating - still coasting), the noise is enhanced. If I am accelerating I don't hear the noise. I played with the brakes thinking dirt or pebbles might be stuck on top of the calipers and grinding against inside wall of rims, but I don't think that is it. My best guess is dirt or grit got into the bearings of the front or rear drive shaft connections, dirt in CV joint(s) up frontor I knocked the transfer case putting front or rear drive shaft out of alignment.

Any ideas??

Also, if I did this damage while off-roading will the warranty cover repairs?

Thanks.
Andy

RE: Noise Diagnosis
 

did you damage any drive shafts ?

RE: Noise Diagnosis
 

Can't say for sure, but that noise sounds like a inner CV joint. Take it to the dealer for them to check out. They should cover it.

RE: Noise Diagnosis
 

No Drive Shafts damaged. The plate protecting the Transfer Case was bent up a bit but nothing out of the ordinary.

RE: Noise Diagnosis
 

quote "Since off-road trip last weekend I have noticed a strange beating noise " maybe you ran over a sharp tailed grouse :D:D:D

RE: Noise Diagnosis
 

Sounds like the typical worn u-joint/cv-joint 'replacement required-type' noise...sans the 'clunking' sound when placing the transmission into gear. Attachment 22592

RE: Noise Diagnosis
 

I thought I'd report back on this one.

I took the H3 to the dealer and after a full day of diagnosis, I just got the call that they will replace the front differential and see if the noise goes away.. Good to see that the GM warranty is good!!!

RE: Noise Diagnosis
 

They had to replace my front diif too... but I had no noise ....no warning....broke 100 miles out of town and had to be towed....Warranty covered mine as well....mine pierced the casing, oil gushed out .....Hope that fixes your problem !

[IMG]local://upfiles/2323/0013BC933C7648A293DEEB25B2350EFC.jpg[/IMG]

RE: Noise Diagnosis
 

What the hell is a sharp tailed grouse??

RE: Noise Diagnosis
 

I had to Google it!!

http://www.northpolealaska.com/Beave...led_grouse.jpg