[TR] Transmission Replacements

Jim Muller jimmuller at rcn.com
Sat Jan 30 15:30:33 MST 2010


On 30 Jan 2010 at 15:41, Al Ramsay wrote:

> I need to replace my 4 speed transmission in my 1969 GT6+ I had it
> rebuild last year and after 5 months a large piece of the laygear
> let go and that was that... I was thinking of the Toyota or Ford
> replacement but feel the kits are very overpriced.

They are available, e.g. Quantum Mechanics (Quantumechanics.com) has 
a Ford 5-speed drop-in.  But I guess it depends on what one considers 
overpriced.  IIRC his unit is over $2000 but it includes a driveshaft 
and I think bell housing too.

When the very loose gearbox in my GT6 let go after I'd had it a year 
I ended up replacing it with a rebuilt unit from Spitbits for much 
less than QM's Ford unit.  I'd consider a replacement but I sorta' 
like the aesthetics of using an original Triumph part.  After two 
years it developed a whine on overrun in 2nd, prompting me finally to 
tear it down last year.  I didn't find the cause I was looking for 
but after the teardown it shifts much better.  The noise is still 
there and getting worse and now after more observation and thought 
I'm thinking it is a laygear thrust washer.  Eventually I'll pull it 
apart again and with luck I can replace them without having to remove 
the entire mainshaft.  Or maybe I'll spring for an upgrade after all.

Anyway, the point is that a rebuilt unit can be much cheaper and may 
be okay but may not be better.  But anything is better than one which 
needs to be carried in a basket.

-- 
Jim Muller
jimmuller at rcn.com
'80 Spitfire, '70 GT6+


More information about the Triumphs mailing list