🔧 Technical Leaking fluid after disconnecting CV shaft from differential

[smug]

So about 4 months ago I was changing the front diff mounts on my 13 Tahoe and I unbolted the right front CV shaft from the diff at the 6 bolt flange. Oddly diff fluid starts leaking out of the flange that I had unbolted so a put it back together right away. Now today I did an oil change and noticed fluid slowly leaking and has been sprayed in that area. Now, I thought that 6 bolt flange would be a dry connection. If it is actually supposed to be wet that when I disturbed that sealing area it would make sense to leak now. Or do you think it’s the axel seal at the end of the diff housing?

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[DEEZUZ]

Outer seal on that yup.

 

[DEEZUZ]

Also are you motor mounts leaking yet? They should be soon

 

[sktchy]

Seal, they're notorious for leaking especially if somethins been leveled with no diff drop.

 

[smug]

Seal, they're notorious for leaking especially if somethins been leveled with no diff drop.

Na. All stock suspension.

 

[smug]

Also are you motor mounts leaking yet? They should be soon

Motor mounts looks good still. I hope I never have to change one because it looks buried. So I’m guessing that the 6 bolt flange is like a stub shaft that uses a C clip setup like a CV axel? Just trying to visualize how diff fluid is getting inside of that stub shaft flange.

 

[sktchy]

It had to have just soaked in there. I've popped a couple loose and seen them wet before and Ive also seen them only leak til they get down to the bottom of the seal and then just get run like that forever too (not that I'd suggest doing such)

 

[Bob Kazamakis]

I’ve never had fluid between the flanges and I’ve pulled plenty of the years, unless it’s like a yoke with a freeze plug or some shit.


Also swapping drivers mount with an h2 mount fixes all of the headaches with those. I bet yours is ripped, they all are

 

[b00sted]

Those year tahoes are notorious for that. My buddy has had 3 different ones that leaked and/or eventually grenaded the front diff.

 

[Turbocharged400sbc]

It would not surprise me that that yoke is straight through to the inside of the diff....

Blind Spines with powdered metal fabrication doesn't work real well so it very likely goes straight through.... It may or may not be blocked with a Welch plug.... That's an extra step/cost they could cut out I'd guess if they figured a hair of anaerobic sealer on the cv flange would keep oil off the ground till outta warranty

 

[Stink Star]

I’ve done about 250,000 of those seals

 

[smug]

So it looks like the shaft with the flange goes all the way through that diff tube. I might just take it into a mechanic shop and get a quote because I don’t feel like fucking with it.

 

[sktchy]

So it looks like the shaft with the flange goes all the way through that diff tube. I might just take it into a mechanic shop and get a quote because I don’t feel like fucking with it.

It's not that bad, I'm pretty sure if you take a hammer on the backside of your 6 bolt flange it'll pop right out of there. Then just run a sheet metal screw into said seal and use that to pull it out and then knock it all back together.

 

[Stink Star]

It's not that bad, I'm pretty sure if you take a hammer on the backside of your 6 bolt flange it'll pop right out of there. Then just run a sheet metal screw into said seal and use that to pull it out and then knock it all back together.

The shaft is too long to fit out. You gotta unbolt the pass side of the housing. Still not hard

 

[Turbocharged400sbc]

There's a special place in h*** for the American axle manufacturing engineer that did the through the Pan differential on the trailblazer's damn rotten scoundrels.

 

[Bob Kazamakis]

I’ve only had to do the drivers side and it was easy, they’re just clips. Like others said dropping the diff down for the passenger side seems to be the way. It’s amazing how they just all leak