Yes, the tranny crossmember is one of the wickedest situations on the
whole car. I think the last time I had to do it I bolted it on while the
engine/tranny was still hanging on the hoist (supported on a jack stand,
as well, for safety), not quite into final position, which gave me a
little more room for wrench turning. All I can say is, try a wide variety
of wrenches, box and open end, with different head angles. It may take
alternate turns with two different wrenches. I wound up using (I think) a
7/16 box from an ignition wrench set, that was incredibly thin and had a
very short handle.
The overdrive lockout switch and the backup light switch are both mounted
on the transmission case, one on each side. They have small plungers that
are activated by the shift rod. When you have removed the transmission
tunnel top cover you can see them and the wires that lead to them. I
suspect that you haven't wired them up properly -- check your wiring
diagram. One possibility is that you cross-wired them -- hooking up the
overdrive wires to the backup light switch, and vice versa. Or wire a
test lamp to each switch in turn and see if and how they respond to
shifting gears. You can adjust their activation slightly by fitting
washers under the switch body. You really need to make sure that the
overdrive lockout works, because if you accidently leave it in OD and
choose reverse, it can destroy the overdrive unit.
Good luck,
Max
Dan Terlizzi had this to say:
>Hello--
>
>I just completed (almost) my first major mechanical adventure on my
>1972 MGB. I installed a new tranny with an overdrive and was surprised
>to find that the easiest part of the job was removing and reinstalling
>the engine/trans. The toughest part was bolting the tranny to the
>supports on the crossmember and after hours of flailing away I have
>only installed two of the bolts. Can any of you offer any tips on how
>to do this more efficiently?
>
>Also the overdrive works beautifully except it remains on in 1st and
>2nd gear--I now have more forward gears than a tractor trailor. In
>addition the backup lights stay on all the time. I think this is most
>likely due to a faulty gear switch. Any thoughts from this
>knowledgeable group would be appreciated.
>
>Regards,
>
>Dan
>
>72 MGB
>87 Landcruiser (rusty and loyal as a dog)
>
>********************************
>Dan Terlizzi
>Sea Grant Water Quality Specialist
>Phone: 410-386-2760 Fax: 410-876-0132
>Email:dt37@umail.umd.edu
>
>"If there is magic on this planet it is found in water"...Loren Eisley
>********************************
>
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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