Correct tap size for breather hole on Dana 60 and 14 Bolt

[handloader90]

Hey all,

Just wanted to know the proper size taps to buy to tap the breather holes in my Dana 60 and 14 Bolt. Both axles have the original breather fitting removed.

Also, would it be better to go with a straight tap over a tapered one?

 

[4X4HIGH]

IIRC it is 1/8" NPT. You want to use an NPT (tapered pipe) thread so that whatever you're going to thread in will tighten up and seal.

 

[handloader90]

Do you know which axle that is for, I took a peek at the holes the other day and I believe the holes are different sizes, the 14 bolt having the larger hole.

 

[sweetk30]

dana def 1/8th .

if I recall the corp 14ff might be next size up . I know my buddy had to go hair bigger and get a different fitting on his . it was a 80's axle .

 

[4X4HIGH]

Both my D60 and 14FF used the 1/8" NPT. Now it is entirely possible that someone has messed around before and has already enlarged the hole.

 

[handloader90]

Mine are CUCV axles, so 80's also.

 

[handloader90]

Also, the original breather fittings were removed by me, no extra metal from the holes was removed in the process.

 

[nvrenuf]

I used an 1/8" npt tap on both of my axles (60 & 70), no drilling needed.

 

[handloader90]

Picked up a 1/8-27NPT tap and a 1/4-18NPT tap today.

 

[handloader90]

Got the holes tapped. Dana 60 was 1/8, 14 Bolt was 1/4. Got some real clean threads and threw some pipe plugs in em until they're ready to go under my Jimmy.

 

[Highpsi]

Man, I sure wish this thread had been floating around a few months ago when I was trying to do the same. My D60 was missing the vent so I figured that one out pretty easy, but the 14b had the fitting broke off nearly flush (all that was left was the small round "saucer looking" base). Needless to say, drilling on that sucker was impossible. I dunno if the damn thing is hardened or what but I figured out it wasn't going to work. Ended up getting it out finally with a 2 pair of vise-grips. One needle nose to grip from vertical direction, then normal to grip the needle nose and keep them from popping loose from flexing when I tried to twist on it.

Once I got the remainder of the fitting out, I noticed it is pressed into the case and not threaded. There are about 3 rows of directional lips holding it in.

Lucky for me, I walked outside and pulled the old fitting right out of my old 10 bolt. Same thing and it pulled right out! I simply smacked it into the 14 with some JB weld for good measure.