bbundy

I think I witnessed the first ND transmission failure last weekend. STR prepped ND Miata rolled on the throttle in second gear and crunch no drive in second gear. sounded just like the sound I have herd many times with 5 and six speed miatas with all the teeth stripped off a gear. It was Ron Bauer's ND his codriver was driving.

turbofan

iTrader: (1)

Remind me never to attend an event with you. Transmissions quake in fear and **** their pants merely by being in your presence.

cyotani

iTrader: (8)

Are you beyond the "back to stock" and warranty it point?

turbofan

iTrader: (1)

Not his car.

bbundy

Confirmed, Stripped second gear. I just though it was an Interesting data point on the ND.

Guess that transmission will not like boost. I think it had around 6000 miles on it. autocrosses in C street then converted to STR trim on 245 Rivals. It was fast. Ron had dirty runs in the 55 second range and I was only a second faster in the low 54's with SSM prep.

18psi

iTrader: (76)

Very interesting. I bet it's weak cause they were saving weight with it too, making the gears just beefy enough to handle the stock power.

aidandj

iTrader: (5)

Wonder if it was part of the bad batch. There was a certain amount of NDs with weak transmissions. Multiple reports of them broken on m.net. Mazda has acknowledged it. Metallurgy reason.

Savington

iTrader: (31)

Definitely not the first one. There was a big, long thread on M.net about a guy who lunched one in a stock street car while driving it on the street. There was also an uncomfirmed comment by someone that knew someone whose uncle fucked a secretary at Fiat who said that the reason they are using the NC 6-speed in the 124 is because they broke one/several ND 6-speeds during development and Mazda didn't want to fund an additional new gearbox just for the 124 variant.

I expect that you'll see a lot more broken gearboxes as time goes on.

aidandj

iTrader: (5)

So does that mean an NC trans+124 bellhousing will bolt up to an ND motor?

Savington

iTrader: (31)

I kind of doubt it. The Skyactiv2.0 and Fiat/Chrysler 1.4T both existed before the ND was a thing, so my money would be on the NC 6-sp getting a unique bellhousing that only bolts to the 1.4T.

asmasm

iTrader: (1)

I remember reading metallurgy issue with a batch of gears but I can't remember if there was a source for that or if it was just something someone heard and posted as fact.

18psi

iTrader: (76)