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Removing Half shaft from diff R33

Pattey21

By Pattey21,
in General Maintenance

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Pattey21 Proficient

Pattey21

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Good afternoon,

I've got a leak out of one of the half-shafts and need to replace the seal.

I've searched for a guide/another thread, nut can't seem to find one (happy to be corrected)

What is the method for removing/reinstalling the half shaft after replacing the seal.

 

Cheers

received_918381569340257.jpeg

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joshuaho96 Veteran

joshuaho96

Posted
Posted
4 hours ago, Pattey21 said:

Good afternoon,

I've got a leak out of one of the half-shafts and need to replace the seal.

I've searched for a guide/another thread, nut can't seem to find one (happy to be corrected)

What is the method for removing/reinstalling the half shaft after replacing the seal.

 

Cheers

received_918381569340257.jpeg

When I had to do this for the front diff I removed the diff cover and spun the diff until I could see the axle inside the diff. Then I used a plastic pry tool with a simple flat edge that gradually widens to full width and a hammer. Jam the pry tool in and use a hammer until the axle pops out. As far as I can tell it did not mar or bend any other parts of the diff this way. My least favorite thing is scraping/prying something out with metal on metal so this was a foolproof technique for me and the car needed a diff oil change pretty badly anyways. Then I used a slide hammer with an expanding jaw puller to remove the seal itself. Be careful when you do this because it will suck to damage the seat of the seal. I expanded it into the rubber to keep it from marring the seat instead of trying to catch the back edge where it meets the seat.

Another method I've seen since doing that job was a tool that hooks onto the outside of the axle and makes it possible to slide hammer the axle out instead of trying to use a pry bar.

  • 3 weeks later...
  • 2 weeks later...
Pattey21 Proficient

Pattey21

Posted
  • Author
Posted

So i refilled it and layed it on its side for a day (new seal side down) no leak, went for a drive today and its weeping. Is it possible to be weeping from the half shaft seal, do the take time to bed in?

The seal cam pre-greased in the centre and i lubricated the shaft prior to install.

MBS206 Grand Master

MBS206

Posted
Posted
7 hours ago, Pattey21 said:

I didn't inspect it thoroughly but my impression when cleaning it prior to lubrication, was the it was "serviceable" but my focus was more on the seal itself.

Not 100% across this half shaft in particular as I haven't removed one, but it will be pretty much the same as others...

 

The surface the seal rests on on the half shaft itself can also wear. If it starts to wear down, it's not going to mate and seal properly. 

When doing the seal, you need to be checking the inner and outer surfaces it mates to, are in good condition too.

 

Is the oil weep 100% coming from the half shaft seal location?

Have you checked the breathers/vents aren't blocked?

Blocked vents will bust an axle seal/make them weep. This could be why it only showed after a drive, as it needed to heat up and pressurise first (diff unable to breath)

  • 2 weeks later...
Pattey21 Proficient

Pattey21

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Hectic few weeks at work.

I made sure to clear/check the diff vent but I will check the breather hose.

My guess for it being the half shaft seal location is based on filling it prior and lying it on the damaged side overnight and it did not weep.

ill have another look underneath/ check the breather hose

 

 

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