Hello all,

I have recently found a leak on the driver's side underbody. I'm not mechanically inclined so I could really use some help with identifying what is actually leaking, and what it may take to repair/replace the issue.

I've included photos to help identify the leak. Thanks in advance for the help.

EDIT: It's more of a seep, as there's really no pooling of liquid when the vehicle is parked. The leak is the greasy looking location in the photos.

 

Here are more photos of the recently discovered leak. A ballpark answer on cost repairs would help as well. Thanks.

 

I would say the input (or output?) differential seal for the CV. The CV would be removed and the seal is grooved into the differential and the CV seem to be pulled too much I think?

Item #3

2009 Hummer H3T Parts - GM Parts | GM Accessories | GM Parts House Store

 

Thank you for the input, as well as your service to our country.

I have a 2006 hummer h3 (with 61,200 miles), I noticed the link you sent was for a H3T. Would this replacement item still work?

 

H3s and H3Ts are identical rear doors forward (except longer rear drive shaft). They use the same rear axles and suspension mounts as well.

Unless something is seeping down from above, you have a front diff wheel bearing seal leak.

 

Oh I see. Looks like I shouldn't have a problem finding a replacement if I attempt to fix this on my own. Appreciate the fast response.

This site has saved me a ton.. Fixed A/C harness, replaced my radiator, unclogged my drainholes and the wind noise thanks to the advice on this forum.

 

careful when you put the cv back in. try not to hit the new seal with the splined shaft or you could damage the new seal and be back in the same boat...

 

I picked up a set of 5 of these to help me. I also have a leakng one in the front and rear so im gonnabe replacing all 4 here soon

Kent Moore Axle Seal Protectors J-44394

 

Thanks for the heads up. So I should perform this repair, then perform a differential fluid flush?

 

You probably have lost a little fluid but not much. There really isn't a flush. It's more of a drain and fill. It's always good to replenish fluids in my book, especially if it's been a while since it's been done. Then if you do the front, you might as well do the rear since you're under there. It will keep them on the same page as far as maintenance intervals... A good habit to get in... The front is tricky to fill. Find a handpump that you can stick the hose in the fill hole and pump the fluid in. You can find them for like $10 or less at Walmart or an auto parts store...