This is pobably a bigger issue than one would think. The early MGB's had
the same type of axle as the MGA - known as a "banjo" axle. When the GT
came out, and for sure somewhere in 1967 production - MG changed axles
from the 'banjo' to a "salisbury." On the banjo axle, it is very easy to
change out the "pumpkin" (ring, pinion, and housing), while on the
salisbury it isn't as straight forward. The salisbury is stronger, and
quieter, so most people want to keep it, but I don't think higher gearing
is available for them. In fact, I have changed my MGA pumpkin out, and
put in an MGB pumpkin so I get better drivability - the acceleration isn't
as good, but I'm not autocrossing it anymore anyhow. I sold my old MGA
gears to Larry Hoy, and I believe he was making a LSD rear axle with them.
Phil Bates
'58 MGA with MGB 3.909 pumpkin
'67 MGB with salisbury 3.909 axle and overdrive
> Hi,
> This weekend I was over at a friends house who's really into racing his
> MGB-GT he showed me how he has adapted an early model MGA rear end assy
into
> his racing MGB-GT telling me that it was about the only way to get the
proper
> gearing he needed. l somehow had always just taken it for granted that
you
> could just swap the R&P gears.. but he told me that there aren't any
resource
> centers where rear gear sets and other rear end parts for racing MGB's
can
> be readily purchased I can't imagine this being true. But, it appears as
if
> Moss only lists a 3.909:01 rear gear set. This is a huge opportunity for
> somebody to create a nice little business for themselves and at the same
time
> do the vintage auto racing a great favor in the process. Or is swapping
an
> "A" housing in place of the "B" housing the norm? To me it just seems
like a
> lot of unnecessary work....
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