Bill,
I've just been digging the diff out of my PB Airline Coupe and found
that the gears are also 7/37, and marked so on the diff housing. I'm
virtually certain that it is the original diff to the car (it has been
off the road and completely untouched for 40 years). It's entirely
possible that this was an alternative to the 8/43 set that everyone
claims is original.
My pumpkin and nosepiece are also steel.
The 7/37 is only a marginally lower ratio. I'm thinking it might have
been used on cars that were more designed for touring (like the Airline
Coupe) rather than race and trials work (like the 2-seater).
Anyone else care to chime in?
Regards,
Lew Palmer
-----Original Message-----
From: owner-mg-mmm@autox.team.net [mailto:owner-mg-mmm@autox.team.net]
On Behalf Of Bill Traill
Sent: Sunday, December 30, 2001 2:18 PM
To: mg-mmm@autox.team.net
Subject: J2 diff
I have been reading with interest the posts on the 2-star aluminum
nosepieced differential.
The pumpkin on J2 #3343 is stamped 7/37 and has a cast iron
nosepiece. The gears are marked 7/37 with a 2-star arrangement.
The speedo face seems to have been modified to suit.
I checked blowers manual which lists the J2 diff ratio as 8/43 with
alternative 8/47. No other MG listed has a 7/37 ratio. I have all the
MG factory documentation for J2 #3343 (thanks to the MG Car
Club) and no mention of a special diff. What is it?
I checked several Morris web sites for specifications and the only
listing of a diff ratio was 9/44 (4.88) for the OHC Morris.
Any thoughts, facts or rumors appreciated.
All the best to everyone in the New Year!
Bill Traill
J2#3343
San Jose, California USA.
British Cars Web: http://www.team.net/sol
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