On Thu, 19 Dec 1996 JKearman@aol.com wrote:
> I hope this applies only to the early o/d transmissions, as I've been told
> you don't have to change anything to install a later o/d transmission
> (all-synchro), a la 72-73.
I recently aquired an MGB O/D transmission also. The unit is from
a 79 B; I am planning on installing it in a 73 MGB.
I did a bit of research on the swap and here is what I have found
from various sources (Bentley, Haynes and A.B Bonds)
There were two types of O/D's fitted to an MGB (D type and LH type)
There are two types of LH overdrives ( black label abd blue label).
The black label is the 'early' LH; the blue label is the later (~76 on).
The difference between them is the speedo gear *inside* the overdrive.
The speedo gears are rare and a royal PITA to replace (dissasembly, etc).
Black label O/D trannys need an O/D speedo.
Blue label O/D trannys and non O/D tranny's use the SAME speedo (~76 on).
77-80 O/D trannys have O/D on 4th ONLY (tranny remote tower is different)
All B's from 68 on use the same length driveshaft (31 1/8).
(this last point has been debated somewhat)
Please correct me if any of these are untrue!
--Scott
Scott Hower --> howersl@ttown.apci.com
Air Products & Chemicals, Inc. 'Its better to be silent and
7201 Hamilton Blvd Trexlertown, PA thought a fool than speak and
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