Transfer Case Leak??? Red Fluid... - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > 4x4 Drivetrain

4x4 Drivetrain 4x4 Repairs & Problems

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  #1  
Old 07-24-2010, 05:14 PM
alchemist alchemist is offline
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2006 Chevy TrailBlazer LS
Graphite Metallic 4.2L I6 4X4
Join Date: Aug 2008
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Transfer Case Leak??? Red Fluid...

After a road trip, the next morning saw a small puddle, 3" maybe, under the car. Pulled it into the garage and climbed under it, and saw the attached picture. Hard to tell where the fluid is coming from, possibly the output shaft for the front wheel drive? Anybody else had problems similar to this, have seen a couple of thread on this, so another question is, if it is a plugged vent line how do I check it and where does the end of the vent line run to, I found where it connects to the transfer case just above the read output shaft. Appreciate any help since this is my first post.

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Old 07-24-2010, 05:25 PM
alchemist alchemist is offline
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Trying to add picture

Having difficult time adding the picture into the thread so below is a link.

http://www2.snapfish.com/snapfish/sl...NAME=snapfish/
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  #3  
Old 07-24-2010, 05:40 PM
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jacob789456 jacob789456 is offline
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2002 Chevy TrailBlazer LTZ
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I'm going to say that is transmission fluid that is leaking somewhere and running down to the transfercase because it sits lower than the transmission. Transfer case fluid is blueish-green and transmission fluid is red. Someone with more experience will chime in here soon. Just check the level of the transmission when it is warm to make sure you are not low.
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  #4  
Old 07-26-2010, 09:38 PM
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RayVoy RayVoy is offline
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Quote:
Originally Posted by jacob789456 View Post
I'm going to say that is transmission fluid that is leaking somewhere and running down to the transfercase because it sits lower than the transmission. Transfer case fluid is blueish-green and transmission fluid is red. .
Yep, you got it Jacob
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  #5  
Old 07-27-2010, 10:01 PM
edogwv edogwv is offline
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2005 Chevy TrailBlazer LS
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Just experienced the exact same symptoms on my 2005... The dealership's diagnosis didn't sound too friendly on the wallet.

I ended up dropping the pan, replacing the filter and 5 quarts with ATF VI... and also replacing an 8 inch section on the trans cooler lines with a rubber transmission hose. It seems moisture gets introduced into the system somewhere because the transmission dipstick was also rusting towards the top-

Not sure how much more life if any this will breath into the trans but it's worth a shot at least-
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  #6  
Old 08-01-2010, 01:20 AM
yannyfreak yannyfreak is offline
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2004 Chevy TrailBlazer LT
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Hello, new to the forum. Just signed up due to my first problem with my 2004 Trailblazer. I have the exact same symptoms as edogwv. My tranny is wet with transmission(not transfer case) fluid and my dipstick was rusty about a third of the way down. I'm also clunking when sitting and shifting gears and also when slowing to a stop. Sounds internal in the transfer case actually. I have no transmission experience at all so hopefully someone has had the same problems and has some input. Any help for the newbie and others would be greatly appreciated!! Leaving for vaca. in a week!
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  #7  
Old 08-01-2010, 01:56 AM
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the roadie the roadie is offline
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Does your transfer case go through all the modes as expected? There was a weak internal bearing carrier design that used to break for folks who overused the A4WD mode. But the tranny issue sounds like you need a local specialist ASAP.
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  #8  
Old 08-01-2010, 05:14 AM
yannyfreak yannyfreak is offline
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Thanks for the input Roadie. I do have full function of all modes but I wonder if something may be on the way out. This is actually the wife's and she loves using that darn auto 4wd! Since my post I did read a bunch of posts about overheating causing the vent to overflow. Thats where the oil is from. It doesn't explain my noise but when I tried it a couple hours ago cold I couldn't repeat the symptoms. Gonna look at it again today when I wake up from night shift and try to repeat the noise. I also believe it was you who posted about the shaft bind that can be fixed with lube or a nickel coated slip ring??(forget part name) replacement. Haven't looked at this yet but sounds like it could be the noise source as well. I have to see how the shafts are removed so I can check this out. Thanks again!
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Old 08-01-2010, 01:55 PM
yannyfreak yannyfreak is offline
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2004 Chevy TrailBlazer LT
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Alchemist, let me know if I stole your thread for nothing, hopefully the problems I'm having are going to help you too or better yet your problem is fixed by now! Anyway, narrowed clunking down to transfer case only after driving truck for a while. The clunking is the worst when sitting and going back and forth between rev&drive. Also pretty much play in rear output shaft, but this may be normal (rookie). I would say the TC is going, but why does it only act up when hot??? Any further input much appreciated.
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  #10  
Old 08-01-2010, 07:25 PM
yannyfreak yannyfreak is offline
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2004 Chevy TrailBlazer LT
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I have verified now that the TC needs to be replaced. I checked some fluid out of the drain and it is filled with metallic particle. Somethings coming apart in there! I may do a swap myself. Does anyone have a material list readily available for everything I would need to do complete swap. Only thing not obvious to me yet is how the front and rear output shafts connect and if the boots are reuseable. Any help would be GREATLY appreciated. I have three days to buy everything and do the install this week and I don't think a shop will get me in that fast!
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leak, red fluid, transfer case, vent line

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