Rear End Vent.

[Planojc]

Originally Posted by nkaminar

I have the Mitchell overdrive with a small leak at the differential and will install the vent that Planojc talked about. The trick will be to keep the chips out of the torque tube. Shop vac? Big magnet?

I drilled the top of the axle housing, not the torque tube and used an air hose to blow away chips as I was drilling. This is where Ford vented their cars when they went to open drive shafts.

[The Master Cylinder]

Originally Posted by redmodelt

Modify one of the banjo bolts. Drill a hole in one, then braze on a section of barbed fitting for the hose to fit over. No drilling of the housing needed.

Originally Posted by Planojc

I drilled the top of the axle housing, not the torque tube and used an air hose to blow away chips as I was drilling. This is where Ford vented their cars when they went to open drive shafts.

It's been awhile. I drilled a banjo bolt and silver soldered a piece of tubing on it. I then ran a piece of clear tubing up as high as I could (higher than my Mitchell vent). It pushed oil out.

I then installed a vent on the axle tube. No more leaks.

[Big hammer]

When drilling holes and you want to control the chips use grease on the drill bit !

[The Master Cylinder]

Originally Posted by Big hammer

When drilling holes and you want to control the chips use grease on the drill bit !

Yes sir, that is exactly what I did. A big ol' glob of grease. Greased up the tap also. Then I stuck a magnet thru the hole to check.

[C1Nelson]

I think venting the axle tube is the way to go. Can I tap it and put in a barber fitting?

[The Master Cylinder]

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Originally Posted by C1Nelson

If I drill one of the banjo bolts I do not have the ability to braze the barbed fitting. I suppose I could epoxy the fitting. Thoughts please.

You could but when I vented one of the banjo bolts it pushed oil out the 2' long clear tube I installed. see post #22. Venting the axle tube worked better for me.

I used a vent similar to this; https://www.amazon.com/Alemite-30080...%2C162&sr=8-10

[C1Nelson]

Originally Posted by The Master Cylinder

You could but when I vented one of the banjo bolts it pushed oil out the 2' clear tube I installed. see post #22. Venting the axle tube worked better for me.

I used a vent similar to this; https://www.amazon.com/Alemite-30080...%2C162&sr=8-10

Perfect, thank you for info where you got it. I also saw where you used grease on the drill and probably on the tap as well? How far from the banjo did you put the vent ?

[updraught]

What goes on in the diff
https://www.youtube.com/watch?v=9-yG3D3JBRs

[john in illinois]

I drilled a small hole in top banjo bolt. It leaked like a sieve. Top vent in axle has worked well.


John