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Discussion Starter #1
Something gave loose driving down the interstate on the front end. I'm assuming the Diff came apart? There was something that looked to be about 3in in dia that was glowing cherry red and Large chunks on alum. that caught the cross member and took a big gouge out of it. I didn't get to look underneath it to good as I was sitting along the istate. Whats common to come apart? We just paid it off last month and this thing has been a nightmare of problems this being the biggest.
I don't mean to sound to stupid but never had and experience with all wheel drive vehicles.
That being said will only TBSS front diff work? Or will other AWD TB that are AWD work?
Where do I find the gear ratio also?
Also why would putting it in park not work with something in the front come apart? I cant even start the motor with out something clattering.
 

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Something gave loose driving down the interstate on the front end. I'm assuming the Diff came apart? There was something that looked to be about 3in in dia that was glowing cherry red and Large chunks on alum. that caught the cross member and took a big gouge out of it. I didn't get to look underneath it to good as I was sitting along the istate. Whats common to come apart? We just paid it off last month and this thing has been a nightmare of problems this being the biggest.
I don't mean to sound to stupid but never had and experience with all wheel drive vehicles.
That being said will only TBSS front diff work? Or will other AWD TB that are AWD work?
Where do I find the gear ratio also?
Also why would putting it in park not work with something in the front come apart? I cant even start the motor with out something clattering.
You've got alot going on here. First off generally the differential doesnt go on these but the passenger side carrier does. They don't get lubrication which causes the splines to wear and eventually you hear a bang and the truck wont drive. If you put it in park and it still rolls I would bet on this being the issue. It stems from the design of our transfer case. You need the AWD diff from a tbss. The components are slightly different than the 4wd version. All TBSS have 4.10 gears. Now you mention clattering when you start the engine, did the front axle problem blow up your oil pan and cause you to lose oil pressure? Can you post pics ?
 

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07 tbss awd
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Sounds like a poorly lubricated carrier that exploded to me.

Because the transfer case in the Tbss is a torsion style unit there is nearly unlimited slip potential between the front and rear outputs. Meaning if one output or the other provides no resistance they can both spin (over simplified of course). So no park in the event of a diff carrier failure is completely normal.

And as stated above if you did have a complete melt down (unlikely and not common) you could have wiped out the oil pan as well. Since the diff and carrier both bolt to it. But that would have been fairly obvious by a gallon or more of oil on the ground.
 

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Discussion Starter #4
You've got alot going on here. First off generally the differential doesnt go on these but the passenger side carrier does. They don't get lubrication which causes the splines to wear and eventually you hear a bang and the truck wont drive. If you put it in park and it still rolls I would bet on this being the issue. It stems from the design of our transfer case. You need the AWD diff from a tbss. The components are slightly different than the 4wd version. All TBSS have 4.10 gears. Now you mention clattering when you start the engine, did the front axle problem blow up your oil pan and cause you to lose oil pressure? Can you post pics ?

The pc that was cherry red was on the driver side looking down in the engine compartment. there was also a large pc of alum housing ribbed blown out. also on pass side. It sits so low and I was so close to moving traffic I gave up looking to close plus it was only 15 out and getting dark. lol

The first thing I did was check the oil I thought the motor came apart when it exploded and there was a lot of smoke. I shut it off so fast I didn't have time to look at oil pressure. That's why I looked at oil. It just caught me off guard when I went to put it in park and I had nothing. Im assuming oil from what ever came apart and got on manifold from all the smoke or maybe the pc the was glowing red. I was very luck it didn't catch fire.
When I was sitting waiting for tow truck I tried to start it for heat and just as it fired up I heard something making a heck of a noise so I shut it off. of was I new something went thur the pans on these and I thought shit its busted.

Im going to try to get pics this weekend of the carnage. I don't have a garage to work on it in and its way to cold on the street. just was trying to pick ppls brains on what I might expect to find. That way maybe I could start looking for parts.

I think I also seen there is a oil pickup tube upgrade that I could do since im going to be in it this far?
 

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Discussion Starter #5
Sounds like a poorly lubricated carrier that exploded to me.

Because the transfer case in the Tbss is a torsion style unit there is nearly unlimited slip potential between the front and rear outputs. Meaning if one output or the other provides no resistance they can both spin (over simplified of course). So no park in the event of a diff carrier failure is completely normal.

And as stated above if you did have a complete melt down (unlikely and not common) you could have wiped out the oil pan as well. Since the diff and carrier both bolt to it. But that would have been fairly obvious by a gallon or more of oil on the ground.
There was a good amount of oil on the ground. Im going to try to get pics that way ppl will know better what they are looking at then I will. Maybe give me and idea where to go from there on fixing it. Im pretty good at fixing just about anything this will be another to add to the list.
 

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07 tbss awd
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Best guess, here is a list of possible parts needed.

-Intermediate axle shaft
-Awd carrier (us powertrain makes a nice unit)
-Oil pan, with extra carrier mount pedestal.
-Differential (bully racing sells complete units) with a limited slip diff if your interested.
-Front drive shaft.
-pcmofnc oil pickup tube if the pan if broken and coming off.

That’s all best guess not knowing for sure what happened.
 

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If there was engine oil on the ground and not diff fluid then this could be expensive.
Doing the pickup tube is not terribly difficult. More like tedious. I just did it on mine.


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Discussion Starter #8
If there was engine oil on the ground and not diff fluid then this could be expensive.
Doing the pickup tube is not terribly difficult. More like tedious. I just did it on mine.


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I hope it was just diff fluid. Lol its going to be expensive no mater what im afraid of..

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08 tbss awd
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urban SS17 I read you just did the pcm of nc pickup tube,i was curious if you would entertain for a fee in helping myself install my pickup tube, motor city speed wants 1000.00 to do it, but they have not called me back in over 2 months and I'm not one to be a pest I figured there just to busy,im located in Livonia and have a fully heated and functional garage if your interested in making some extra money,thanx 4 reading
 

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Discussion Starter #10
Heres a few pics so far. I should be able to get it on the lift first if the week.


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TrailblazerSS 3SS
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Not hijacking but help do one yesterday in an I6 TB.
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urban SS17 I read you just did the pcm of nc pickup tube,i was curious if you would entertain for a fee in helping myself install my pickup tube, motor city speed wants 1000.00 to do it, but they have not called me back in over 2 months and I'm not one to be a pest I figured there just to busy,im located in Livonia and have a fully heated and functional garage if your interested in making some extra money,thanx 4 reading
I'm not against working on your truck but I need to get my own back together before I work anyone elses. Also you really have to be a pest with motor city. I've found that its best to email them.
 

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Discussion Starter #15
Not hijacking but help do one yesterday in an I6 TB.
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Yep that kinda looks like what i have to look forward to. Where did you find replacement parts?

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I picked up a unit at a local yard. Opened it up and cleaned / inspected replaced seals which NAPA had the outboard one but not the inner one. Filled with oil and sent it on its way.


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I picked up a unit at a local yard. Opened it up and cleaned / inspected replaced seals which NAPA had the outboard one but not the inner one. Filled with oil and sent it on its way.


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How big of a project is it?

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My SS was an AWD so I didnt think twice about dropping passenger side steering rack and pulling oil pan to get it out. Did it on a lift and was in and out in 5 hrs.


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