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R380 gearbox output spline
NS Dev - 2/11/10 at 05:31 PM

Long shot, but anybody know:

a) what the spline is on an R380 output shaft (mainshaft), it seems to measure 29.56mm OD by 10 spline which is rather "unusual"!!!!!!

b) who might be able to cut me a shaft to match!

T66 - 2/11/10 at 05:51 PM

Nat


I will stick something on difflock, see if they can help.

T66 - 2/11/10 at 05:57 PM

difflock reply -


http://www.ashcrofttransmissions.co.uk/



NB read their section on viscous couplings re them seizing !! I

[Edited on 2/11/10 by T66]

hillbillyracer - 2/11/10 at 07:49 PM

I've got a dead transfer box from one sitting outside my workshop if it's any good me measuring? But as you state it seems to be 29.56mm by 10 spline I'm thinking you already have something to measure & you're looking for conformation?

Just remebered my verniers are at work anyway!

NS Dev - 2/11/10 at 09:02 PM

quote:
Originally posted by hillbillyracer
I've got a dead transfer box from one sitting outside my workshop if it's any good me measuring? But as you state it seems to be 29.56mm by 10 spline I'm thinking you already have something to measure & you're looking for conformation?

Just remebered my verniers are at work anyway!


Yea, trying to confirm, and sort of hoping that somebody might say "yea those are common splines used on x, y and z"........................think I might be dreaming though!

Having trawled the net it would seem that 10 spline 29mm metric is pretty common, but its definitely bigger than that!

NS Dev - 2/11/10 at 09:06 PM

quote:
Originally posted by T66
difflock reply -


http://www.ashcrofttransmissions.co.uk/



NB read their section on viscous couplings re them seizing !! I

[Edited on 2/11/10 by T66]


Cheers Ivan, Will call them tomorrow. I did think of ashcroft, but I doubt they will be able to cut the splines. I have run out of engineers in hinckley that can do it, none can! Got a gearcutters in Coventry coming back to me tomorrow, after they've checked their tooling.

If it was scrapheap challenge, I'd try welding the mainshaft to the drive cup, but I'd be pretty sure of just scrapping both if I did that!!!

Take it you've seen the pics of it with the engine bolted in? Looking good now!!!

PS worst case with the viscous coupling is a new one, at £175 not the end of the world, but Id bet we can get another transfer box for not a lot.

[Edited on 2/11/10 by NS Dev]

T66 - 2/11/10 at 09:21 PM

Im going to ring Graeme tomorrow re the box, he has others !

And we have access to some good lathe engineers here in the dark north, a buddy of Graemes does it for a living. See what I can do.

I know they have cut splines in Graemes workshop playing with their lathe.

Come back to you once Ive spoken to him, If he cannot do it Im about 80% he will know someone who can.

NS Dev - 2/11/10 at 09:31 PM

Yea, need to bear in mind the power and torque going through that shaft and the fact that they strip splines on range rovers. I think I would like to induction harden the splined end, but leave the rest of the shaft softer (particularly to allow for the weld to the cup)

That weld worries me to be honest, but to get the cup machined as part of the shaft would be very expensive if the "cunning plan" doesn't work!!

If it all works, then a one piece shaft could be worth a go as a batch might be on the cards!!

T66 - 2/11/10 at 09:47 PM

A contact of Graemes who is interested in the little Fiat , is a good contact who I need to have a chat with.

Induction hardening is something I will mention, I just need to have a think about who best to put the bite on.

Infact Im going to ask my brother in Texas, his company make some serious offshore hardware.

Still plenty options, will ring you tomorrow.

NS Dev - 2/11/10 at 09:47 PM

ok cool, spk tomorrow