Leaking rear axle

Transmissions, Rear Diff, etc.
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Travco Model: 1972 D270 413

Leaking rear axle

Unread post by broomeju » Wed May 29, 2019 6:50 am

After topping up the gear oil in the rear end and taking a trip noticed leaking oil. How can I determine if this needs a replacement gasket or bead of silicone at the axle to hub surface vs. needing new oil seal?

Both sides are doing this.
Brake work last year I thought the mechanic doing the work had replaced the oil seals. At least on one side I’m sure he did but that one is leaking, too.

Any thoughts on next step in investigation and eventually fixing this?

My 1st thought was slide the axles out clean them up and seal with silicone. But of the oil seal is leaking where’s the oil going to go if it can’t come through the path it is currently taking? Certainly don’t want oil in the brakes.
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Re: Leaking rear axle

Unread post by KB2CRK » Wed May 29, 2019 7:40 am

Slide the axles out, clean and silicone or gasket the ends of the axles. The oil you see leaking is the oil that lubricates your rear wheel bearings. Check to make sure the vent on the differential is clear. If it is plugged there could be pressure building up and forcing the oil through the weak spot.

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Re: Leaking rear axle

Unread post by rjsdotorg » Fri Jun 07, 2019 8:58 am

Those cone washers will also leak if the threads under them are not RTV'd when installed.
I used gaskets, but red Permatex is OK.
Check the diff oil level

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Re: Leaking rear axle

Unread post by datsit » Wed Jun 12, 2019 9:44 pm

Use " CAUTION " when removing cones !! Remove axles clean hub & axle face, silicone or gasket the ends of the axles, put some white grease in the stud holes or on cones, in & OUT - - cones are obsolete parts - - you are asking for trouble if silicone /gasket sealer sticks to the cone - - YOU WILL DAMAGE THEM on next removal !!! GUARANTEED !!

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Re: Leaking rear axle

Unread post by rjsdotorg » Sat Jun 15, 2019 11:58 am

datsit wrote:
Wed Jun 12, 2019 9:44 pm
Use " CAUTION " when removing cones !! Remove axles clean hub & axle face, silicone or gasket the ends of the axles, put some white grease in the stud holes or on cones, in & OUT - - cones are obsolete parts - - you are asking for trouble if silicone /gasket sealer sticks to the cone - - YOU WILL DAMAGE THEM on next removal !!! GUARANTEED !!
I got new cones at https://sandiegofriction.com
I did learn to whack the axle end fairly hard with a hand sledge (as per FSM!) to pop the old ones loose.

I also dug 1.5" of sludge out of the bottom of the diff (and cleaned with kerosene), and the oil was like chocolate...
IMG_5995.JPG
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Re: Leaking rear axle

Unread post by datsit » Sat Jun 15, 2019 7:21 pm

This is an item that is seldom serviced & maintained !!!

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