Witches hat leak

Diffs, axles, lockers, transmissions, portals, that kind of thing.
Post Reply
United States of America
Posts: 10
Joined: Thu Jan 15, 2015 2:28 pm

Witches hat leak

Post by mdevino » Fri Feb 07, 2020 12:15 pm

I haven't dug into this at all yet, but based on the size of the puddle I'm thinking I lost most of the contents of fluid in my front diff on my 710. I'm guessing it's the witches hat seal, based on the oil coming from around the front cardan shaft housing flange.

Any advice on the best approach to getting to this seal? I'm thinking pull rear diff and center tube, while supporting the transmission. Doesn't sound fun, but probably a bit easier than pulling the front diff.



Sent from my iPhone using Tapatalk

User avatar
United States of America
Posts: 1080
Joined: Sun Sep 25, 2011 12:19 pm
Location: Woodside, CA

Re: Witches hat leak

Post by rmel » Fri Feb 07, 2020 2:48 pm

Nope, you gotta pull the front diff out. You really can't disassemble from the back end
all the way to the front diff witches hat. That would be a nightmare and a disaster.

If your located in SoCal or TX might want to see if Goatwerks or FatFab can do a front
diff job for you. It would also be a good excuse to upgrade to EX-II. And yes the front
diff job is a huge PITA.
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712M

Driver: Ron // KO0Q

Brady 712k
United States of America
Posts: 44
Joined: Wed Sep 30, 2015 6:03 pm
Location: Boston MA

Re: Witches hat leak

Post by Brady 712k » Mon Mar 23, 2020 7:06 pm

I did the witches hat seal on my 712K. It was leaking from the hat off of the transfer case to the drive shaft going forward. I got tired of topping off the transfer case every 180 miles and filling up the torque tube!
Side note..... if the torque tube becomes to full, the gear oil will heat up expand and blow out of the vent breather tube up by your starter!!!!......
Ok so....
It was an $8.00 seal but to do the job I had to buy a gantry crane and chain fall from Horrible Freight for about $700.00 bucks!
It wasn't a difficult job but a bit time consuming.
If you think any pics of the rear hat seal being done will help I can post some here!

Post Reply