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Old 10-06-2008, 12:03 PM   #1
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guy with a FM kit on a 99 had this happen to him yesterday at an autox. im not sure on his exact setup tho. the car has seen A LOT of time eating cones, usually sets FTD.
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Old 10-06-2008, 09:32 PM   #2
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I'd say the FM kits don't put down enough power to be breaking trans gears unless you drive it like a ******* moron. I got 2 words for that guy.

Learn to ******* shift.
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Old 10-06-2008, 09:49 PM   #3
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An FMII w/2560 on a '99 makes 250whp without breaking a sweat... lots of auto-x abuse at that power on sticky tires and I can see breaking a 5spd with a missed shift.
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Old 10-06-2008, 10:00 PM   #4
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oh god this reminds me of my subaru days
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Old 10-07-2008, 10:31 AM   #5
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It is more than likely going break other stuff first if power was in question.
Seems more like as mentioned, missed shift.
But we all know it is easier to blame the car instead of the driver...
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Old 10-07-2008, 11:14 AM   #6
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AFAIK the transmission IS the weak link in the driveline (with a 1.8 rear in the line up). Add to that a big clutch upgrade and a driver who consistent dumps the clutch (at a stop and at speed) and I can see that happening regularly. Figure the Miata trans wasn't designed to manage nearly the amount of torque these turbo kits are throwing at it. And then the abuse just amplifies the duty. Fortunately Miata transmissions are relatively cheap and plentiful.
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Old 10-09-2008, 10:50 PM   #7
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yeah, well the owner of the car has a lot of different co-drivers. he is actually a very good driver, doubt it was all him. but like m2cupcar said, can always pick up another trans if need be
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Old 10-09-2008, 11:42 PM   #8
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I know many competitive auto-xers carry spare transmissions with them to out of town events. My trailer was specially modified to remove transmissions from Miata's for that reason. haha
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Old 10-11-2008, 10:44 PM   #9
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I know of one 220whp failure (mine) and one 200whp failure. Both were hard 2-3 shifts, both 6-puck clutches, both had stripped 3rd gears.
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Old 10-12-2008, 09:48 AM   #10
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Yep- when you pull slack out of the driveline with high lock up clutches and removing those soft diff bushings, something's gotta absorb the shock. The Miata trans/gears are tiny and do amazingly well IMO for what kind of power they stand up to. I don't doubt that my clutch (which is like an on/off switch) played a role in the death of my first trans.
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Old 10-12-2008, 10:38 AM   #11
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Well, good to know.....
Glad I have a spare just in case.
I did notice quite a bit of difference when I installed the polybushings in the diff. mounts.
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Old 10-15-2008, 12:12 AM   #12
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it's competition, setting FTD means he should be at the limit, of everthing.
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Old 10-15-2008, 12:15 AM   #13
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Quote:
Originally Posted by majorposer View Post
it's competition, setting FTD means he should be at the limit, of everthing.
Just to give you fair warning, if you keep spamming your way to your privileges and try to sell something soon, you will be banned.
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Old 10-15-2008, 01:42 AM   #14
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Quote:
Originally Posted by KPLAFIN View Post
Just to give you fair warning, if you keep spamming your way to your privileges and try to sell something soon, you will be banned.
Not to mention the ban stick shoved right up his ***.
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