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Old 01-23-2012, 01:00 AM   #21
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But since a Miata weighs less the a mustang, the T5 should but up with a lot more power, right?
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Old 01-23-2012, 02:01 AM   #22
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Originally Posted by Gearhead_318 View Post
But since a Miata weighs less the a mustang, the T5 should but up with a lot more power, right?
The domestic worlds views on transmission strength is very, very different than ours.
They're breaking T5s with 3000+ lb cars usually running on massive sticky tires and being as mean as possible to them.

Last edited by Full_Tilt_Boogie; 01-23-2012 at 04:38 AM.
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Old 01-23-2012, 03:57 AM   #23
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Back in my mustang and Camaro days, t5's were a frequent fail part but so was a 700R4 auto. V8 torque and the weight of the car have to play a significant factor in durability.

The T5 should stand up much better considering the weight of a miata and the lower low end torque numbers of the turbo cars.
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Old 01-23-2012, 05:06 AM   #24
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Originally Posted by DeerHunter View Post
It's too bad the Quaife gears are no longer available (price probably had a lot to do with it).
The "wide range" Quaife (QKE3K, 2.564 1st and 0.794 5th) is still available and will be available for at least a couple of more years (according to the Quaife rep I talked to at Autosport last weekend). 1476.00 plus VAT isn't dirt cheap though.
With the Quaife and a 3.6 you get 1st identical to a 6speed 2nd with 4.1.

With my 4.875 I would with a Quaife set get a 1st that's taller then the 6sp with 3.6 (which I know is on the short side even with stock power from the 03 I had to 8 years). But I'm far from the torque range to have issues.

A 1st of 2.2-2.6 seems to be what's wanted.

Edit: What about this wide gear set for the T5?

Ok, getting a new box and then start to modify it adds up. I'ts easier to convert a 6sp to a 5sp with a dogleg "1st"
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