Loud Four Wheel Drive?

[sparg93]

how do you check the fluid on our transfer cases? is this something that needs to be changed?

 

[SunlitComet]

There are two plugs in back of case one drain one fill. check the fill plug to ensure fluid reaches bottom of hole. check your owners manual for replacement interval.

 

[96ProCompTahoe]

i don't notice any noise when mine is in 4wd.

 

[muncie21]

how do you check the fluid on our transfer cases? is this something that needs to be changed?

If you have the Auto 4WD button, be sure you're using the right fluid.

 

[sparg93]

thank you for the advice - yes I have the Auto 4wd.

We're supposed to get hit with another winter storm in the NorthEast and I haven't had an ounce of time to get my Blizzaks mounted...it's killing me!

 

[My01yuk]

Engage 4WD and hearing a sound

Hey guys, I realize I'm in the OBS section but I have only gotten one response to this question in the NBS section so I decided to see if maybe someone over here could possibly help me out. I have an 01 yukon slt 4WD. Saturday i decided to take the family for a quick off road ride, nothing fancy just a few minutes of off roading. As I approached the turn to go off road i put it in 4WD. I noticed a sound almost like grinding. We were probably off roading for 3 minutes and then i went back to normal road conditions and put it back in 2WD and the noise stopped.
We went to a store and when i got back in, before backing up i put it in 4WD again to see if it made the noise while going in reverse, I heard it again and then it seemed like it didn't want to go so I put it back in 2WD and all was fine. As I put it in drive i again put it in 4WD and heard the noise again. I'm thinking it's my wheel hubs but can't be sure as I am clueless when it comes to 4WD. What little I have learned I have learned on here. Any ideas?

Thanks

 

[noJeepshere]

Hey guys, I realize I'm in the OBS section but I have only gotten one response to this question in the NBS section so I decided to see if maybe someone over here could possibly help me out. I have an 01 yukon slt 4WD. Saturday i decided to take the family for a quick off road ride, nothing fancy just a few minutes of off roading. As I approached the turn to go off road i put it in 4WD. I noticed a sound almost like grinding. We were probably off roading for 3 minutes and then i went back to normal road conditions and put it back in 2WD and the noise stopped.
We went to a store and when i got back in, before backing up i put it in 4WD again to see if it made the noise while going in reverse, I heard it again and then it seemed like it didn't want to go so I put it back in 2WD and all was fine. As I put it in drive i again put it in 4WD and heard the noise again. I'm thinking it's my wheel hubs but can't be sure as I am clueless when it comes to 4WD. What little I have learned I have learned on here. Any ideas?

Thanks

You don't have part-time wheel hubs, you have a drive flange that connects the cv shafts to the hub all the time. There is a center axle disconnect that moves in the front differential to connect the front driveshaft (from the t-case) to the front axleshafts (to the wheels) This may be stiff from non-use, or if you use 4x4 a lot in your Yukon, it is wearing out. At the same time, the CV shafts could be bad, but that is more akin to a snapping/popping sound when turning under load.

TIP: you should never use 4x4 on dry pavement, especially when turning. The transfer case has no provision for different wheel speeds front to rear and turning in 4wd will cause it to bind up and unless the tires have little traction, they'll grip harder than parts can withstand. In short, something goes boom and you're stuck.

 

[My01yuk]

Nojeep,

Thanks for the info, although some of it went a little over my head I got the gist of it. I hear a slight snapping/popping or maybe the better word is quackling sound when turning like in a drive thru sometimes. I think I will have the CV shafts as well as the center axle disconnect looked at. Thanks again for the info, that was very helpful.