[6pack] Fw: TR3 Transmission

[Bill Wellbaum]

Any comments on the question below.  We need some expert advice.

Bill Wellbaum
British Auto Club of Las Vegas
----- Original Message -----
From: Jonas Payne
To: Bill Wellbaum ; Bill Wellbaum ; billwellbaum at lvcfs.com
Sent: Thursday, July 21, 2011 7:47 PM
Subject: TR3 Transmission


Bill,



To bend your ear a bit







Here's what my thought was, but I don't think it will work.



I have a fully rebuilt TR4 transmission sitting on the floor of my garage.  -
non overdrive.    It is fully synchronized and works beautifully.



I have a broken 1959 overdrive TR3 transmission in the car.



In a perfect world, I'd remove the broken unit, separate the OD, remove the
tailpiece from the good gearbox, bolt the OD to it and reinstall - about 6
hours worth of work and back in business.



As near as I can tell the OD units for all TR3/4s were "Type A" and identical.



Unfortunately, it would appear that the mainshaft for OD transmissions were
not the same as OD transmissions on  TR3 transmissions.  I have no idea
whether or not this was the case for the fully synchronized TR4 unit I have.



Thus the question to post to the TR Web if you would for me.



Can I bolt an OD from a TR3 up to  a TR4 non OD transmission?  If not, what
would be required to do so.



My research is telling me that I need to get a longer mainshaft for an OD TR4
and install it in my rebuilt TR4 trans, which is equally as much work as what
will likely be required with the existing broken trans.



Other minor benefits to my rebuilt trans are:



                Tilton hydraulic throwout bearing - ready to go.

                MGB pressure plate for aforementioned bearing

                TR4 clutch disc - much better than TR3 unit.



Question is  - can this be done?



Then we get to the ethical dilemma  - am I buggering up a numbers matching car
to gain synchro in 1-2?







Jonas Payne

Director of Preconstruction

Thor Construction

PH:    (702) 269-2007

Fax:   (702) 269-7095

Cell:   (702) 358-5084