[Zmagnette] 4 synchro MGB trans in ZB

Tue Nov 26 22:42:44 MST 2013

As Steve K states I installed a 4 syncro overdrive many years ago in my ZA. I would not even consider doing so today. The 5 speed kits are so much easier to do. The come with everything you need and require almost no modifications to the car. To install the late over drive you need to build a rear transmission mount, a transmission tunnel, drive shaft, speedo gear box and cable. Then deal with the starter hitting the frame and making a clutch hydraulic line. I also did some mods to the shift tower, but do not remember exactly what. I think that covers it all.
-- 
Sent from my Android phone with mail.com Mail. Please excuse my brevity.

Steve Kirby <skirby210 at cox.net> wrote:

It is not my place to answer this, and it is further not my place to offer up this answer, but I will anyway!  One of my first, of many, mentors, in the Magnette World was Steve Carroll . . . he of thee superb header set up many of us have purchased.  Steve did put a full late B synchro in his.  I do remember Steve describing the various things he had to do.  Steve is a person of immense talents, so his pay grade is much higher than mine.  Perhaps Steve will answer, now that I've prodded him a bit, or Charlie can contact him directly.

#2SteveK

----- Original Message ----- 

From: LannM at aol.com 

To: zmagnette at autox.team.net 

Sent: Tuesday, November 26, 2013 8:29 AM

Subject: Re: [Zmagnette] 4 synchro MGB trans in ZB

Shifter location aside, the 4 sync is wider than the 3 sync.  Compare a 3 sync MGB with a 4 sync.  The transmission tunnel is noticeably different.  I've put a 4 sync in and early MGB and it takes a lot of work with a BIG hammer to move sheet metal around.  Even then, its still a tight fit.  I can't imagine a Magnette would be any easier.

I think Allen is right, a Hi-Gear 5 speed would be quicker, easier, and probably cheaper.

Lann 

In a message dated 11/26/2013 10:19:44 A.M. Central Standard Time, durningcharles at gmail.com writes:

Robert,

I didn't think that even modifying the remote would work.  It would still be too far back, not to mention the height.  I was thinking about eleminating the remote and mounting the shifter directly to the opening on the trans where the remote attaches.  I still have to get under the car and do some measuring to see if that would be close.

It would be good if some BMC car used the 4 synchro trans with a direct shifter.  That would keep me from having to make something.

Charlie Durning

If you are using Google or Gmail, Big Brother is watching.

On Tue, Nov 26, 2013 at 1:58 AM, <monster at caverock.net.nz> wrote:

http://www.beardmorebros.co.uk/website%20pages/Dads_Oxford.html

On the above page are some photos and a description of fitting an MGB engine and 4-synchro+overdrive 'box to a 1960's Farina Oxford.
It includes a pic of shortening the remote gearlever extension to fit, and a new tunnel.

I'd agree that the benefits of non-OD box over all the mods needed for a 3-synchro box might not be great.
I also love the sound of the non-synchro 1st gear. Bah, musicians, eh? :-)

regards,
-- 
Robert 

On 26.11.2013 15:50, Allen Bachelder wrote:

Charlie,
Even without overdrive, the remote shifter on the MGB 4-sync sits
high and your going to have to substantially reshape the transmission
tunnel to make it fit. That's a ferocious price to pay for a
synchronized first gear. If you're going to that much trouble, you
might as well go five-speed.

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