axle diff ratio problem

Post by **neiltomlinson** » Mon Mar 26, 2007 7:24 pm

hi all
i have just taken a diff out off a mogey back axle number is 10/39=??? i have looked on a diff in my shed is 9/38 =4.22 does any one know thanks neil

Post by **bigginger** » Mon Mar 26, 2007 7:44 pm

Not quite sure what you're asking, but 9:38 IS 4.22, if that's it

Post by **bmcecosse** » Mon Mar 26, 2007 8:19 pm

So 10/39 is 3.9:1 diff!

Post by **bigginger** » Mon Mar 26, 2007 8:53 pm

Aha! Sorry, I'm very thick

Post by **Onne** » Mon Mar 26, 2007 10:53 pm

Which are rare and sought after too!

Post by **neiltomlinson** » Mon Mar 26, 2007 11:12 pm

thanks for that so which year car was the 10/39 fitted neil

Post by **bigginger** » Mon Mar 26, 2007 11:23 pm

It wasn't, to the Mog, anyway. Somebody's bound to know which cars had them, as lots of BMC cars had the same type of diff.

Post by **alex_holden** » Mon Mar 26, 2007 11:27 pm

At a guess, Wolseley 1500 perhaps? That 3.7:1 diff from a Riley 1.5 that I posted about a few days ago sold for £81.

Post by **bmcecosse** » Tue Mar 27, 2007 7:30 am

Some Spridgets not 3.9 ?

Post by **Willie** » Tue Mar 27, 2007 5:07 pm

The 1275cc midgets had the 3.9-1 diff ratio.

Post by **neiltomlinson** » Tue Mar 27, 2007 7:35 pm

hi thanks for your replays
numbers on the diff is
mowoo bta 1224 10/39
& how can i find out if shafts have been hardend any numbers on them??? thanks again neil

Post by **bmcecosse** » Tue Mar 27, 2007 8:07 pm

Dunno really - look for any 'blueing' - and lack of wear marks on the splines!

Post by **Willie** » Wed Mar 28, 2007 9:41 am

There was no blueing on my hardened shafts but the splines were 'as
new'.

Post by **Kevin** » Wed Apr 04, 2007 4:22 pm

Yes its a Midget diff as both the Wolseley and Riley had the 3.7 or 11/41 as confirmed by the 1500 owners club spares person and plastic orange.

Post by **Matt** » Wed Apr 04, 2007 7:38 pm

Most of the 1500 midgets have the 3.9 too ;) although the last 3/4 years of prioduction used the 3.7