Sadly, Rocky, neither the A-type nor the J-type were ever used on MGBs.
Depending on the year of your MGB, you would need a D-type (through 1967) or
LH-type (68 on).
However, just finding an overdrive unit does not help your case - you need
to find a complete gearbox with overdrive fitted, or else an overdrive unit,
mainshaft, and assorted adapters and bits and pieces to convert your non-o/d
box to accept the overdrive.
Lawrie
PS I happen to have a 4-synchro MGB gearbox with overdrive for sale. Fully
overhauled and ready to go, $1,500 plus shipping.
----- Original Message -----
From: "Chip Old" <fold@bcpl.net>
To: "Krislyn Co LLC" <krislynco.llc@adelphia.net>
Cc: "MG HELP SITE" <mg-t@autox.team.net>
Sent: Tuesday, November 15, 2005 6:36 PM
Subject: Re: overdrive
> On Tue, 15 Nov 2005 17:59 -0800, Krislyn Co LLC wrote:
>
> > looking for info on a Laycock de Normanville overdive unit a friend has
> > for sale it is the 27% model...whatever that means.... and was used on
> > the triumph tr6 and volvo...does anyone know if this would work on my 74
> > MGB it needs overdrive badly as I use it on the highway alot.. Need info
> > ASAP...
>
> The Triumph TR-6 used the A-Type overdrive through 1972 and the J-Type
> from 1973 on, so I have no idea what a "27%" model would be.
>
> --
> Chip Old 1948 M.G. TC
> Cub Hill, Maryland, US TC6710 XPAG7430
> fold@bcpl.net NEMGTR #2271
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