[Healeys] Spiral bevel differential in BN1

[Peter Linn]

Mine are both 5 stud and the one in the coupe at least has RH threads both 
ends. That one has had a filler plug added to the back of casing; the other 
hasn't & I filled it via the breather!

Cheers

Peter

----- Original Message ----- 
From: "John Harper" <ah at jharper.demon.co.uk>
To: "Peter Linn" <greylinn at ozemail.com.au>
Cc: "Alan Seigrist" <healey.nut at gmail.com>; "John & Kerry Rowe" 
<jkrowe46 at bigpond.net.au>; "Healey List" <healeys at autox.team.net>
Sent: Thursday, February 25, 2010 12:44 AM
Subject: Re: [Healeys] Spiral bevel differential in BN1



Peter

Let me please make it clear that I am not discussing the early BN1
spiral bevel 4 stud rear axle.

The later BN1s and all BN2s had the BMC axles that were hypoid 5 stud.
The later BN1 versions had a filler plug on the front nose of the
'pumpkin' and incidentally R.H. threads on both ends of the casing that
held the hubs in place. The BN2 version had the filler on the rear of
the casing and handed nuts holding the hubs in place. In most respects
you could fit either 'pumpkin' to either case but you could end up with
two fillers or none depending on the selection

The same Design Alteration Note dated 26/5/1955 also covered the Morris
Six, Wolseley 6/90, Austin BS4 (A90 Westminster), Riley 2= litre and
half ton van.

Therefore if you had a pumpkin from a Wolseley 6/110 it is likely to be
without a filler on the neck because I believe that there was no change
from the Wolseley 6/90 to the 6?100 other than perhaps the gear ratio.

Regards

>
>I've been under the misapprehension (apparently) that the way I ended up 
>with 2 BN1s with no filler for the rear axle was that later diff centres 
>(with no filler on the "pumpkin") had been put into old type casings (with 
>no filler on casing). I know of 2 other cars in the Queensland club in a 
>similar situation. Both mine are 3.54 diffs, one of which I believe is from 
>a Wolseley 6/110. Any ideas?
>
>Peter Linn
>Brisbane
-- 
John Harper