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Rear Axle Tube Oil Leak


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More planned winter work on my TR4 is to try and tackle an oil weep I have from where the axle tube fits into the diff casing,

I'm thinking of having this specialist welded, it being disimilar metals and all, anyone any experience of fixing this?

John.

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Hello John,

In another recent thread I mentioned the use of “Denso tape” to wrap around the rear springs of solid axle cars. It got me thinking of other uses of the tape and the problem you have was one I thought about.

Denso tape is an ancient industrial material that has been used to seal 1001 different things in the past and with something like a small weep from the axle case/tube joint I think it would work well. Provided the air vent on the casing is clear there will be no pressure trying to force the oil out, it will just be leaking due to gravity.

Just a single layer, overlapped 50% and going a couple of inches each side of the leak may well do it.

Worth a try as it will only cost a few quid and take maybe half an hour to do.

To take the axle out, and get it welded would take several hours (Plus a lot of swearing) and cost a lot more.

Charlie

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Does it mean the axle tube is loose in the centre casing?  

Had that issue on a Californian 3A some years ago.  It dripped oil from the tube to case joint when driving

 

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10 minutes ago, Lebro said:

Often caused by jacking the rear of the car up on the diff casing, something I no longer do.

Ahhh....

I never thought of that as something not to do.

Thanks for the advice.

 

6 minutes ago, Mastaphixa said:

have been jacking mine from the diff case.  Is there a preferred single jack point at the rear of the car?

I'd be interested to know as well.

The only central points would be the two round tubes at the back. They look too delicate, so I've never used them.

Charlie

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  • 3 weeks later...

Following on from my initial post, I have new springs to fit over the winter, and probobly will take the opportunity

to remove the axle and have it sorted.

With the springs off, will the axle come out sideways with the hubs fitted?

John.

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Spring removal won't make any difference to the axle removal John, because it sits above the chassis rails it will still need to be moved sideways one way  initially until you can drop the other end down inside the chassis rail & out from underneath.

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Clearance underneath is very tight, I've always found it easiest to pull the hubs (retain shims in their order each side) and suspend the backplates with brake shoes and hydraulics (all still connected and untaouched)  from above and wiggle the bare axle out. Some rags underneath help in case a seal has leaked inside and oil is laying within the tube. The time taken to remove hubs and back plates is repayed in less swearing trying to remove a fully built up axle (including it's extra weight with hubs, halfshafts, rear plates and shoes etc). I seem to remember (been 30 years since I pulled the axle) it's only got about 1/4" clearance on the end of the stripped axle tube against the chassis frame, when the axle and diff is pushed across fully the other side.

Mick Richards

Edited by Motorsport Mickey
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As per Mick's reply John, I don't think it's possible with back plates & hubs/halfshafts attached, I've done four axle swaps so far this year and have now got it down to a couple of hours but as Mick says - just suspend the back plates/with brake lines attached - the flexi hose to the front of the axle gives more than enough play for this. the combination of weight & additional length would make it very difficult if not impossible to do with the hubs & half shafts still in.

 

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4 hours ago, RogerH said:

Hi Mick,

 you have a PM from a few days ago.

 

Roger

Hi Roger,

Sorry I’d missed that, you have a message back.

regards Mick

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Two things to add

One: had the tubes welded into the "Pig's head" central diff housing  when I wanted to go rallying in the 4. I took the axle to a welder friend who TIG welded the tubes while I waited.

Two: I cut some marine ply and bolted it to the two tubes at the back of the chassis, the bolt heads being let into the ply. This creates a solid simple easily found place to locate a trolley jack

Regards to all

MichaeH

PS image upside down sorry!

IMG_7297.jpg

Edited by MichaelH
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