Need to remove tranfer case and transmission - 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 04-30-2011, 12:23 PM
intitusville intitusville is offline
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2002 GMC Envoy SLT
Monterey Maroon Metallic 4.2L I6 AWD
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Need to remove tranfer case and transmission

I know there's a "how to:" remove transmission and "how to:" remove the transfer case on this site someplace but for some reason I can never get the search feature on this site to work correctly for me, I get any and every post I need except what I'm looking for...

Back to the point... I parting out a 2002 fully loaded GMC Envoy SLT 4WD and so have remove the rear drive shaft (easy...) and disconnected the front drive shaft at the U-joint but can't get it off the transfer case. I found a posting about removing the transmission but it was just written and refers to other post and no pictures and found it hard to follow since some of the terms and part names were confusing. I need detailed instruction (with pictures would be nice) on how to remove the front drive shaft (without damaging the transfer case) and how to remove the transfer case from the transmission and then I think I will be able to remove the transmission but any tips and trick to best do this would be nice...

Note to site moderators... It would be nice if you could post "how to:" post on the first pages, that would make stupid posts like this one less often...
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  #2  
Old 04-30-2011, 02:19 PM
jbernatz jbernatz is offline
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2004 Chevy TrailBlazer LS
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Remove the front drive shaft with the transfer case as a complete assembly.

To remove the transfer case from the transmission (after removing and disconnecting all the wiring to it) you can just unbolt the 5 or 6 nuts that secure the transfercase to the end of the transmission.
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  #3  
Old 04-30-2011, 03:43 PM
intitusville intitusville is offline
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Quote:
Originally Posted by jbernatz View Post
Remove the front drive shaft with the transfer case as a complete assembly.

To remove the transfer case from the transmission (after removing and disconnecting all the wiring to it) you can just unbolt the 5 or 6 nuts that secure the transfercase to the end of the transmission.
So, there are 5 or 6 long bolts that go all the way through the transfer case to the transmisstion.? I see many small bolt that looks like it hold 2 halves together. Once the bolts are out does it just come off our does it need to be pull back a distance.? Once removed, how is the front drive shaft removed.?

Any tips and/or tricks to remove the transmission.?
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  #4  
Old 04-30-2011, 03:52 PM
jbernatz jbernatz is offline
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They aren't long bolts at all, they are studs that are in the transfer case. The transfer case the connects to the rear of the transmission and is held there using nuts that are on those studs. If you have questions, I suggest atleast looking through compnine to get somewhat of an idea from their parts diagrams.

And use heat on the connectors that goto the neutral safety/transmission range switch. There is a sealer/glue in them that is really strong, heat from a heat gun or something will soften it and allow the connectors to pull right out.
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  #5  
Old 04-30-2011, 04:05 PM
intitusville intitusville is offline
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2002 GMC Envoy SLT
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Quote:
Originally Posted by jbernatz View Post
They aren't long bolts at all, they are studs that are in the transfer case. The transfer case the connects to the rear of the transmission and is held there using nuts that are on those studs. If you have questions, I suggest atleast looking through compnine to get somewhat of an idea from their parts diagrams.

And use heat on the connectors that goto the neutral safety/transmission range switch. There is a sealer/glue in them that is really strong, heat from a heat gun or something will soften it and allow the connectors to pull right out.
I just took a better look and I see the bolt that connect the transfer case to the transmission. It looks like I need to remove the transmission support first so assume I need to put something to support the transmission and something else to support the transfer case until I can remove the bolts then remove the transfer case.

I looked at compnine.com but it really hard to see with drawings, if I could see actual pictures I would be easier to figure out... I may take pictures when I do this and post them for other that may take on this job...
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  #6  
Old 07-27-2011, 12:30 PM
intitusville intitusville is offline
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Finally got the transfer case and transmission out as a whole. It looks like 3 parts, transmission, transfer case and some sort of adapter (marked with the orange circle in picture) between the 2. Is that adapter part of the transfer case, transmission or is it something that can be removed and not part of either.? Does this part go with the transmission or the transfer case or neither.?

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  #7  
Old 07-27-2011, 01:13 PM
jbernatz jbernatz is offline
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That is indeed an adapter...there are 5 or 6 nuts on the transfer case side of that adapter...you just needed to remove those nuts to disconnect the transfercase from the trans. The nuts/bolts on the trans side of the adapter do not get removed as the adapter takes the place of the tailshaft when the trans is used in 4wd applications. Aka, the adapter is "part of the trans".
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  #8  
Old 07-27-2011, 03:39 PM
intitusville intitusville is offline
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That's what I thought... Got it off and I guess I could take it off the transmission since I'm planning on selling the transmission...

One last question... How do I get the front drive shaft off the transfer case.?

Quote:
Originally Posted by jbernatz View Post
That is indeed an adapter...there are 5 or 6 nuts on the transfer case side of that adapter...you just needed to remove those nuts to disconnect the transfercase from the trans. The nuts/bolts on the trans side of the adapter do not get removed as the adapter takes the place of the tailshaft when the trans is used in 4wd applications. Aka, the adapter is "part of the trans".
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  #9  
Old 07-27-2011, 07:22 PM
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harpo1 harpo1 is offline
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The drivshaft is hold by a C-clip just give it a good hit with a hammer and a piece of wood to protect it from damage.
Just like the front drive axles.
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  #10  
Old 07-28-2011, 08:18 PM
intitusville intitusville is offline
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Where to I hit it or does it matter.? Does it come right off or does it take a lot of force.? I don't want to break anything...

Quote:
Originally Posted by harpo1 View Post
The drivshaft is hold by a C-clip just give it a good hit with a hammer and a piece of wood to protect it from damage.
Just like the front drive axles.
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