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aniesigh

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Discussion starter · #1 ·
Hi all, i own a 55 plate navara and (its hard not to) read plenty about the leaky halfshaft problems with the seals wearing a groove in the shaft etc, and that billcar do replacement halfshafts, but it works out pretty expensive!
Anyway, i have gone about it a different way and hopefully it will last just as long at a fraction of the cost...basically i've had 2mm turned off the sealing face and got a 38x72x8mm double lip seal to replace the single lip 40x72x7 seal that was in there originally!
New wheel bearing and outer seals of course as well,
fingers crossed she'll be a good'un
Just an idea if anyone else ends up in the same situation as i was :)
 
did you get any pics mate and who turn the shaft down
 
Discussion starter · #3 ·
Heres the old shaft, obviously been leaking and you can see the scored line.


Old vs modded



new seal



thats about it really, rest was the same as normal. engineering shop over the road from my work did it for me, cost me a tenner and the seal was ÂŁ4 i think
 
nice post mate :thumbleft: thanks
 
great mod. whats the seal no?
 
I thought the problem was the steel in the halfshafts was too soft? Are you not going to have exactly the same problem in a few thousand miles when the new seals wear into the turned down halfshafts? It looks like a great short term solution but long term it might be better to swap them for halfshafts from a later model.
 
When I first saw your post I was a bit concerned the turning would weaken the driveshaft but having seen the pictures I'm impressed. :thumbright:

It will be interesting to see how many miles this top bodge lasts.

Great work and top post. :awesomework
 
2.5TD said:
I thought the problem was the steel in the halfshafts was too soft? Are you not going to have exactly the same problem in a few thousand miles when the new seals wear into the turned down halfshafts? It looks like a great short term solution but long term it might be better to swap them for halfshafts from a later model.
55 plate with average miles, say 80k miles, if he can get another 80k, I think we could all live with that kind of "short term solution" for ÂŁ14 and a bit of elbow grease.
 
Discussion starter · #10 ·
I'd happily loose another 2mm in another few years and change seal size again, the weakest point in the shaft will be down at the splines and i don't think its ever really at risk of breaking anyway.
Will see what happens,
 
aniesigh said:
I'd happily loose another 2mm in another few years and change seal size again, the weakest point in the shaft will be down at the splines and i don't think its ever really at risk of breaking anyway.
Will see what happens,
If it happens again get a sleeve out of harder material just to shrink around the shaft.
 
Nice job :thumbright: but to be honest i'm not sure it will last that long, I would have though the original sealing face would have been surface hardened in some way although obviously not enough, having turned that off you may find that the same issue occurs in a few thousand miles

Worth a try anyway :fingersx
 
how about

taking 5mm off and weld it up again so you have it machined on a metal lathes? to the original diameter. you could also put the double lipped seal on it?

I bet the weld would be much stronger then the soft metal nissan uses on the halfshaft.

just a guess
 
R_ace-navara said:
how about

taking 5mm off and weld it up again so you have it machined on a metal lathes? to the original diameter. you could also put the double lipped seal on it?

I bet the weld would be much stronger then the soft metal nissan uses on the halfshaft.

just a guess
Welding will cause crystalization of the metal shaft leaving it brittle and liable to break.
Much better to go with a hardened sleeve.
 
diggerman said:
R_ace-navara said:
how about

taking 5mm off and weld it up again so you have it machined on a metal lathes? to the original diameter. you could also put the double lipped seal on it?

I bet the weld would be much stronger then the soft metal nissan uses on the halfshaft.

just a guess
Welding will cause crystalization of the metal shaft leaving it brittle and liable to break.
Much better to go with a hardened sleeve.

good luck finding a hardened sleeve that fits.....but it could be possible :wink:
 
R_ace-navara said:
diggerman said:
[quote="R_ace-navara":1zr5bb5f]how about

taking 5mm off and weld it up again so you have it machined on a metal lathes? to the original diameter. you could also put the double lipped seal on it?

I bet the weld would be much stronger then the soft metal nissan uses on the halfshaft.

just a guess
Welding will cause crystalization of the metal shaft leaving it brittle and liable to break.
Much better to go with a hardened sleeve.


good luck finding a hardened sleeve that fits.....but it could be possible :wink:[/quote:1zr5bb5f]
I think Billcar fit a sleeve when they fix the leaking halfshafts.
When I used to make parts and specialized tools I hardened quite a few myself, haven't needed to do any for near 30 years though.
 
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