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@rcn.com
'80 Spitfire, '70 GT6+
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