Wow, that makes it sound complicated. I put a late OD in my 66 B and all
I did was run two wires -- one from the fuse box to the dash switch, and
from there to the lockout switch (on the tranny), and one from the other
side of the lockout switch to the OD solenoid. I frankly had no idea
there was a relay and a vacuum switch involved. I am not quite sure why
there is an issue with the OD engaging with the throttle closed (which it
seems to be the purpose of the vacuum switch to prevent).
BTW I am now looking at Fig. Fa.10 on p. 167 of Bentley, which shows the
OD circuit in isolation, and may be a little easier to figure out.
Have you checked the usual catalogs to see if the OD sub-harness is
available?
Mgbbob@aol.com had this to say:
>Hi there Listers,
>I've been away from the list for a while and it's a real pleasure to get
>back
>in.
>
>I have a few questions that I'd like the list to comment on.
>
>I just acquired an overdrive for my 1966 B (GNH3L78708) with a GB series
>engine.
>
> 1. Bentley's wiring schematic (diagram 2) shows items 68, 71, 72, 73 and
>74 as part of what seems like a separate harness. It's shown in
>phantom so I assume that this is not available unless the
>overdrive is ordered. Is this true?
> Will I have to make my own harness?
>
> 2. I've been told that the OD relay unit (68), the gear switch (73), and
>the throttle switch (74) are all included in the main harness. Is
>this
>true? Are they available?
>
> 3. Are there any other problems I'm likely to encounter in this
>conversion?
>
>Thanks in advance for your comments listers..........I really need to
>resolve
>these issues.
>
>Bob Stahlbush
>
>66 MGB RD GHN3L 78708
>60 TR-3A TS 81398 L
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
|