Thread: Tailshaft help needed

looking at my disco's lt230, there shouldnt be any trouble machining up
a drive adapter to go from the bolt pattern of the lt230 to the nissan drive flange, assuming that the nissan is simmilar to the disco/rangie set up(i havent seen the nissan one.)
with the adapter made up(prob for both ends) the tail shaft will need to be shortened.

the adapter would bolt to the handbrake drum via countersunk hex head bolts then the nissan flange can be bolted to that.
is this what you were asking???

have you spoken to anyone like hardie spicer about different options?

post some photos ash, any good machinist should be able to make the adapter.

phil

Maggot,
I would try to establish the exact cause and any contributing factors of the latest break. I don't know if you have already gone down this road, but I would seek some expert guidance as to eliminating the problem. It may require some technical geometry/mathmatical theory to get it right.
Good luck!
Regards
Maggsie

You must have binding issues or similar to break 2 in a month 8O

Pic of now dead shaft

Please be kind to us dial up users & reduce the pic size,,,,,,,please.

is the piece that broke all cast steel???
what was the brand of the joint ash?
the weakest point of a uni joint is the tips of the yoke(where the caps go through)
by looking at the pic it just looks like a casting fault/ sh%t cast quality.
where it broke(the joint) is the split metal all the same colour and texture?
if there is a different colour, usually at the outer surface is quite likley
to be a crack in the cast.

take it back to the shop and demand another and see if it does it again?

phil

Ya know just looking at how it broke, my theory is that it is too long and when the axle hit the bump stops on the hill the shaft bottomed out on the spline..remember the bump stops can compress about 40 MM or more.

See how it broke across the point where the shaft joins the yoke.
Imagine whacking it on the ground in a vertical position. That is where I would expect it to break.
Regards Philip A

<div class='quotetop'>QUOTE(\"PhilipA\")</div><div class='quotemain'>Ya know just looking at how it broke, my theory is that it is too long and when the axle hit the bump stops on the hill the shaft bottomed out on the spline..remember the bump stops can compress about 40 MM or more.

See how it broke across the point where the shaft joins the yoke.
Imagine whacking it on the ground in a vertical position. That is where I would expect it to break.
Regards Philip A[/b][/quote]

If it broke due to bottoming it should have witness marks on the end of the spline. Similarly, if it broke due to exceeding the design angle, there should be marks to show this on the ears and the matching points they hit. A competent metallurgist should be able to analyse the cause of the break. Is it possible it was simply overloaded? Probably a shock load due to a wheel suddenly gripping when spinning while the shaft was at close to maximum angle. I would think in normal circumstances an axle or planet wheel shaft would break, but I seem to remember you have heavier axle asemblies?