Gear Lube in CV to Differential Flnage

Tractionless · 02-22-2021, 11:18 AM

Just finished pulling the diff for bushing replacement. Upon splitting the CV axle to differential flange (6 bolt) about 1/4 oz. came out of each.

There was zero sign of leakage prior to disassembly. I've watched some videos on differential pulling and that connection was dry in all cases.

I assume the repair is made from the inside so I might as well do a new LSD at the same time.

What type of facility is best suited for said work?

In in the S. Florida area if anyone can recommend a shop.

Thanks for any insight you can lend.

Spooler · 02-22-2021, 12:00 PM

Not sure what you are talking about. If you are saying some gear lube ran out when you took the stub axle out, that is normal.

Tractionless · 02-22-2021, 12:02 PM

Quote:

Originally Posted by Spooler

Not sure what you are talking about. If you are saying some gear lube ran out when you took the stub axle out, that is normal.

The inside of the connection on the diff side (cup shaped) is wet as is the flat CV axle portion it bolts to.

Ghostvette · 02-22-2021, 12:10 PM

Quote:

Originally Posted by Tractionless

The inside of the connection on the diff side (cup shaped) is wet as is the flat CV axle portion it bolts to.

Inside the CV joint itself? There is grease in there, usually it's not liquid.

Tractionless · 02-22-2021, 12:28 PM

Inside the bolted connection.

Spooler · 02-22-2021, 12:33 PM

That wouldn't raise a red flag to me.

Tractionless · 02-22-2021, 01:03 PM

Quote:

Originally Posted by Spooler

That wouldn't raise a red flag to me.

Feeling like since it's out it should be fixed but not sure of what that would entail nor where to bring it.

Spooler · 02-22-2021, 04:05 PM

Quote:

Originally Posted by Tractionless

Feeling like since it's out it should be fixed but not sure of what that would entail nor where to bring it.

Is the hole in the middle all the way through the shaft? If so, it either was overfilled or got hot and puked it in there. I would suggest a diff cooler if the hole is all the way through the shaft.

Tractionless · 02-22-2021, 05:11 PM

Quote:

Originally Posted by Spooler

Is the hole in the middle all the way through the shaft? If so, it either was overfilled or got hot and puked it in there. I would suggest a diff cooler if the hole is all the way through the shaft.

I assume you mean is there a hole all the way through the CV shaft?

No hole in the CV Shaft side only what appears to be a hole at the back against the differential side of the flange all the way inside the "cup" that can be seen in the pic I posted above.

Spooler · 02-22-2021, 06:05 PM

Quote:

Originally Posted by Tractionless

I assume you mean is there a hole all the way through the CV shaft?

No hole in the CV Shaft side only what appears to be a hole at the back against the differential side of the flange all the way inside the "cup" that can be seen in the pic I posted above.

No, in the stub axle.

sirnixalot · 02-22-2021, 04:29 PM

That is sofa king weird the lube is in there and the hole doesn't go through the axle stub. Maybe someone lubed them for easy removal.

1slow370 · 02-23-2021, 07:11 PM

i have never seen a hole straight through the stub shaft.. usualy there is a little divot from the centerdrill used for machining but it shouldn't go all the way through? i would be tempted to say it is a defect but nissan might have changed it. it we be a really stupid place to put a vent holeas none of that area is sealed. i would be tempted to say someone lubed it for easy dissassembly. check to see if the hole goes all the through the stub flange if it does i would check with a dealer to see if they made a change to it and if not get a new stub flange.

Rusty · 02-23-2021, 08:17 PM

The stub axles I have sitting on the bench have centering dimples for machining. But no hole all the way through.

Check the back side of the CV joint for anything that doesn't look normal.

1slow370 · 02-24-2021, 05:39 PM

Quote:

Originally Posted by Rusty

The stub axles I have sitting on the bench have centering dimples for machining. But no hole all the way through.

Check the back side of the CV joint for anything that doesn't look normal.

This is what I thought. OP pop the stub axle out of the diff and see if it's damaged. If not I bet somebody just lubed the crap out of it when they put it together.

Tractionless · 03-03-2021, 09:51 AM

Quote:

Originally Posted by 1slow370

i have never seen a hole straight through the stub shaft.. usualy there is a little divot from the centerdrill used for machining but it shouldn't go all the way through? i would be tempted to say it is a defect but nissan might have changed it. it we be a really stupid place to put a vent holeas none of that area is sealed. i would be tempted to say someone lubed it for easy dissassembly. check to see if the hole goes all the through the stub flange if it does i would check with a dealer to see if they made a change to it and if not get a new stub flange.

What point would have they lubed for disassembly, bolt flange to CV or stub axle to housing?

Upon further inspection there isn't light shining through the stub so I assume the hole doesn't go all the way through.

02-22-2021, 11:18 AM	#1 (permalink)
Tractionless A True Z Fanatic Join Date: Jan 2016 Location: Atlantic SE Posts: 1,358 Drives: '10 K23 ST 7AT Rep Power: 30526	Gear Lube in CV to Differential Flnage Just finished pulling the diff for bushing replacement. Upon splitting the CV axle to differential flange (6 bolt) about 1/4 oz. came out of each. There was zero sign of leakage prior to disassembly. I've watched some videos on differential pulling and that connection was dry in all cases. I assume the repair is made from the inside so I might as well do a new LSD at the same time. What type of facility is best suited for said work? In in the S. Florida area if anyone can recommend a shop. Thanks for any insight you can lend. __________________ Toys Not Tots Last edited by Tractionless; 02-22-2021 at 11:46 AM.

02-22-2021, 04:29 PM	#11 (permalink)
sirnixalot Track Member Join Date: May 2017 Location: Cayman Islands Posts: 685 Drives: 2010 370Z Rep Power: 57454	That is sofa king weird the lube is in there and the hole doesn't go through the axle stub. Maybe someone lubed them for easy removal. __________________ 2010 Sport - LS3 swap loading 2012 Frontier - BTWTuning VK56DE swap

02-23-2021, 07:11 PM	#12 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	i have never seen a hole straight through the stub shaft.. usualy there is a little divot from the centerdrill used for machining but it shouldn't go all the way through? i would be tempted to say it is a defect but nissan might have changed it. it we be a really stupid place to put a vent holeas none of that area is sealed. i would be tempted to say someone lubed it for easy dissassembly. check to see if the hole goes all the through the stub flange if it does i would check with a dealer to see if they made a change to it and if not get a new stub flange. Spooler likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-23-2021, 08:17 PM	#13 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,402 Drives: 2011 Nismo GM 6M Rep Power: 2684438	The stub axles I have sitting on the bench have centering dimples for machining. But no hole all the way through. Check the back side of the CV joint for anything that doesn't look normal. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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02-22-2021, 12:00 PM	#2 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,013 Drives: 2013 Nismo 370z Rep Power: 2684393	Not sure what you are talking about. If you are saying some gear lube ran out when you took the stub axle out, that is normal.

02-22-2021, 12:33 PM	#6 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,013 Drives: 2013 Nismo 370z Rep Power: 2684393	That wouldn't raise a red flag to me.