Offroad Trailblazers and Envoys

SO IT BEGINS - FRONT DIFF SWAP

G80, GU6, GT4, GT5, WTF? This section is for gearing and driveline stuff.

by larryk » Fri Oct 14, 2016 8:43 pm

Well, it begins. Started taking parts off tonight, and the attached pics are the result of about an hour and a half or so of teardown. As of now, I'm thinking of pulling the pan to swap it, but damn.....That hole where it is looks so tempting that it would fit. Lol. I guess I'm debating the pan swap, the out the top method, or the cut the frame and reweld it method. Debate, debate, debate...Sigh. And for those of you who will ask, I'm replacing all the A arms, knuckle, wheel bearings, bushings, steering rack and ball joints.....so it's all coming out.

Only "hiccup" so far was the stupid disconnect being a pita to get off the pan. The new one slides right in, but that old one...yikes!

Any pics anyone wants, let me know. I'll check in the AM, and then I'll be off grid as the phone will be in the house, and I won't be :)
Attachments
20161014_192908.jpg
Close up of disconnect outer bearing. Not bad
20161014_192858.jpg
The infamous disconnect and the intermediate shaft
20161014_192838.jpg
Knee has been removed
20161014_192814.jpg
Torn down all the way to intermediate shaft
larryk
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by Anthony Hernandez » Fri Oct 14, 2016 10:22 pm

I'm doing the same thing man. I'll be going out the front once I get the damned thing off. It's suuuuuuper stuck in there. I pryed and beat that shit out of it and nothing worked. I sprayed it with everything possible and only got it to move 1/4". Hope things go better for you homie. Mine has been a bitch. I'll do a detailed thread later with pics and such.
Marks3"-moog 14's-fox shocks-z71's-4.56 gears-rear locker-
My build - viewtopic.php?f=74&t=6225
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Anthony Hernandez
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by larryk » Sat Oct 15, 2016 2:26 pm

Got heem.... 3 1/2 hours to pull all the suspension components, oil pan and that pesky front diff!
Attachments
20161015_132038.jpg
Nothing where the stupid diff used to be....Lol
20161015_132031.jpg
Beautiful engine innards
20161015_132008.jpg
The old parts
20161015_132003.jpg
My dear friend the front diff
larryk
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Posts: 121
Joined: Thu Jun 09, 2016 9:14 am
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Vehicle: Chevrolet Trailblazer EXT
DriveTrain: 4WD w/ Limited Slip

by larryk » Sun Oct 16, 2016 5:20 pm

Success! Total time to do the following work, 13hours. Keep in mind, this wasn't just a front diff swap. Would have been probably only 4-5 hours to swap the diff only. I used the dropthe pan method...strongly recommended, as it was pretty straightforward and simple.

Here is the list of all I did:

Swapped diff
New disconnect
Replaced lower Aarms
Replaced and flipped UCA
All new ball joints
Polyurethane bushings
New poly sway bar bushings
SS steering rack (fastest of the three ratios)
New axles (Detroit Axle)
New timken wheel bearings
Replaced front U joint
Stainless Brake lines, 1"longer

Fun times!
Attachments
20161016_093450.jpg
20161016_093530.jpg
20161016_093545.jpg
20161016_121440.jpg
20161016_121455.jpg
20161016_121500.jpg
Last edited by larryk on Mon Oct 17, 2016 9:55 am, edited 2 times in total.
larryk
Off-Roader
 
Posts: 121
Joined: Thu Jun 09, 2016 9:14 am
Name: Larry
Vehicle Year: 2004
Vehicle: Chevrolet Trailblazer EXT
DriveTrain: 4WD w/ Limited Slip

by Aries » Sun Oct 16, 2016 5:33 pm

larryk wrote: the out the top method,


Worked for me
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by larryk » Mon Oct 17, 2016 9:58 am

Aries wrote:
larryk wrote: the out the top method,


Worked for me


I think, having looked at what it takes to do the up the top....and actually dropping the pan, I can see where both are legit ways of doing it, although the drop the pan method was very simple and clean. Also, the side benefit of being able to inspect the engine internals and verfiy if there are any issues in your pan.....I vote to drop the pan.
larryk
Off-Roader
 
Posts: 121
Joined: Thu Jun 09, 2016 9:14 am
Name: Larry
Vehicle Year: 2004
Vehicle: Chevrolet Trailblazer EXT
DriveTrain: 4WD w/ Limited Slip


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