Sheryl, this O/D will fit your car. MG only made 2 overdrive units. The D
type for 62-67 and the LH type for 68-80. In 1975 they modified the LH type
so it only had O/D on fourth gear whereas the earlier LH type has O/D on
third and fourth. The earlier ones are the better ones to buy because they
also work on third which is great around country roads. There's really no
way to check the O/D out before you install it in the car. It either works
or it's doesn't. One thing to check before you write the check is the
solenoid. This is on the bottom of the unit. When connected to a 12v
source you must hear the solenoid click in and out when power is supplied on
and off. Otherwise it's pretty much a crap shoot. I've bought 2 O/D sight
unseen and they both work great. Unless the Previous owner ran it without
oil which is impossible because it uses the same oil as the gearbox it
should be OK. To have an O/D rebuilt will cost you more than the original
cost. Like everything else that's old you pay your money and take your
chance. BTW also have Dennis remove the side inspection cover of the
gearbox to have a quick check of the gears, but the gearbox is pretty much
bullet proof and normally only the syncros need replacing which is a very
straight forward job, (remember which bolt has the rubber washer). Another
tech session in the making. I know that Greg is also good at gearbox
rebuilds, he's probably done more than me.
Hope this help,
Andy
-----Original Message-----
From: nobbc-bounces@autox.team.net [mailto:nobbc-bounces@autox.team.net] On
Behalf Of Sheryl
Sent: Wednesday, June 18, 2008 4:27 PM
To: North Bay British Car Club
Subject: Re: [Nobbc] Sheryl and Dennis - OD trans for your B
Hey! no worries:-)
Does anyone know the difference between an OD tranny for 68-74 MGB verses an
OD tranny for a 75-80?
We had noticed that Moss Motors has different part #s for 68-74 and 75-80.
It might just be a bolt pattern thing or clearance for a certain piece so it
fits correctly. If anyone has any information about the difference, it would
be appreciated.
Thanks!
Sheryl
----- Original Message ----
From: gtwincams <gtwincams@pacbell.net>
To: North Bay British Car Club <nobbc@autox.team.net>
Sent: Wednesday, June 18, 2008 3:22:14 PM
Subject: Re: [Nobbc] Sheryl and Dennis - OD trans for your B
Hi Sheryl,
I guess I should have screened it better, but didn't really have time,
so just put the word out to you after making contact with the seller.
You really will love OD - especially because it can be made to work in
all forward gears if you want, or more commonly, 3rd and 4th. Really
cuts the racket and engine wear. Essential for a long trip. I can't
remember what the ratio is for MGB ODs, but they are typically from
23-28%, which is significant.
Is there an absolute contraindication with this gearbox from an earlier
car? E.g. different input shaft, bolt pattern, etc.? My MGB knowledge
stopped with the 1972 model years...
Cheers,
Greg
Sheryl wrote:
> We checked the listing on craigslist and it 's the wrong year
transmission.
> "MGB Transmission, factory overdrive.Fits 68-74."
> We have 1976 MGB's. We sent a request to a friend who has parts to see if
he might have one.
> Dennis and I are very interested in testing out an O/D tranny with the
Colorado trip in mind.
>
> Sheryl & Dennis
> 1976 MGB
> 1976 MGB
>
>
> ----- Original Message ----
> From: Ron Engelhardt <nobbc@sonic.net>
> To: North Bay British Car Club <nobbc@autox.team.net>
> Sent: Tuesday, June 17, 2008 6:58:49 PM
> Subject: Re: [Nobbc] Sheryl and Dennis - OD trans for your B
>
> Andy and Sherry, keep us posted. I think this would be an interesting
> tech session subject for our members due to the popularity of this type
> of conversion. Andy, how was your tour two Saturdays ago? Sorry I had to
> miss it!
>
> Ron
> 58 MGA
>
> Andy Preston wrote:
>
>
>> Sheryl, Marla and I are definitely going to Colorado in 2009. An O/D
would
>> be great relief from the high revs. If you buy it I'll be more than
happy
>> to help Dennis put it in. We had a tech session in my garage for the
MGOC 4
>> years ago and we did an engine swap with the old tranny in one day. If we
>> made it a NoBBC tech session I'm sure we could beat the previous time.
The
>> price is very good for a working O/D tranny. I think I paid $700 over 6
>> years ago.
>>
>> Andy
>>
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