Chunk leak

[old guys rule]

Installed a fresh 8 and 3/4 center that leaked some gear lube from the pinion seal after refilling. Complete professional rebuild including new pinion seal. Could this be caused by overfilling axle?

 

[R413]

Maybe, probably not. Is the vent clear?

 

[Don Frelier]

If it's a leather seal it might go away on it's own after it heats up and runs a bit.
Just trying to be optimistic.
You could try taking out the fill plug and see how much if any runs out.

 

[Kern Dog]

The 8 3/4" axle has that vent that should allow for expansion as the lube warms up and gets sloshed around.
If the axle lube was added with the axle in the car, it isn't easy to overfill it....The lube gets to the fill hole and wants to spill out as you're adding it.

 

[Fran Blacker]

Wrong seal, if it's a 742 housing could happen.

 

[Darter6]

Yes ^^^^ a 741 and 489 use a different seal than the 742

 

[old guys rule]

Yes ^^^^ a 741 and 489 use a different seal than the 742

Yes ^^^^ a 741 and 489 use a different seal than the 742

489 professionally built

 

[pnora]

489 professionally built

That's not saying much if its a leaker.

 

[ckessel]

Is it leaking from the actual seal or between the yoke and pinion shaft?

 

[Darter6]

Is it leaking from the actual seal or between the yoke and pinion shaft?

I have seen this. Fluid crawls up the splines and exits behind the nut and washer or nut threads.
Little silicone on splines and threads will stop this.
I prefer a leather seal over the rubber ones. These are just thoughts.

 

[hunt2elk]

Permatex makes a RTV sealer for gear oil. I always smear some of that on the splines before slipping on the yoke.

 

[ckessel]

I use Teflon paste on the splines. Yoke and shaft.

 

[old guys rule]

That's not saying much if its a leaker.

 

[old guys rule]

This guy rebuilds formula 1 motors

 

[old guys rule]

Is it leaking from the actual seal or between the yoke and pinion shaft?

I'll have to get under there with a flashlight tomorrow

 

[old guys rule]

Permatex makes a RTV sealer for gear oil. I always smear some of that on the splines before slipping on the yoke.

View attachment 1667695

Good idea!

 

[old guys rule]

Maybe, probably not. Is the vent clear?

I haven't checked yet. By the way do you happen to know the torque spec for a 489?

 

[1 Wild R/T]

Did he use a crush sleeve eliminator? Or a crush sleeve?

 

[old guys rule]

Did he use a crush sleeve eliminator? Or a crush sleeve?

Eliminator

 

[1 Wild R/T]

Eliminator

Well that helps... If you need to replace the pinion seal you just torque the pinion nut, you don't need to worry about a crush sleeve allowing the bearing reload to change...