I gave up on the GT6 box a few years ago, destroying third gear every other
weekend, and put in a TR6 box with a close ratio gearset sourced from British
Frame and Engine. It's been extremely reliable, and it's all Triumph.
I run a 3.8_ rear (3.89?) and on most tracks I don't miss a fifth gear. Some
people swear by the overdrive transmissions, but I know others that have
regular problems.
On Oct 26, 2014, at 8:29 PM, damys@charter.net wrote:
Looking for advice on a transmission upgrade for the GT6. I've spoken
with Quantum Mechanics and they offer four options. Standard GT6 box,
upgraded GT6 box with TR7 gears, a TR6 trans mod and the T9 option. My
fear with the GT6 option is the constant rebuilding, although I
understand it offers the best ratios. The best seems to be the T9, but
$3400 is a lot especially considering the other costs of building a
racecar from the ground up
If the T9 is the best, would it be a sound move to go with a lower diff
ratio to be able to utilize 5th gear, or stick with the 3.27:1.
Thanks
Dave and Alex
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