Who has broken a 6 speed?
 

Mine is starting to make bad noises at high revs in 3rd and 4th. Sounds like gear teeth rattling.

Curious if it was the sound of eminent failure.

Bob

thesnowboarder just broke one.

Bob, parts are cheap. I paid $360 in labor and $250 in parts to have my 5/R shift fork, selector, reverse synchro and gear replaced over the winter. Open it up and have it looked at before something goes really bad and wrecks multiple gears.

Sounds like I need to find a spare gearbox.

.........and I've got a crap load of used six speed internal parts that I'll sell for cheeeaaaaaap to get them out of my garage. The areas of concern are in the group of parts I have.


Sav:

Under what conditions was snowboarders six speed when he broke it???

i think he downshifted to 3rd....and CABLAM!

Is there a shop out there in Miataland that knows the ins and outs of building a stronger 6spd box?

Downshifted to 4th and it let go. He hasn't opened it yet.

Jay, nobody makes/builds a stronger 6-speed box except the MSM boxes with the shotpeened gears. TSB is the first one I know of to fail during road course use. My box looked perfect when I had it open. If I do start breaking stuff, just start filling it with MSM gears.

If the gearbox lasts 2 years at these power levels, that's acceptable to me.

oh yeah! it was 4th, my bad.......

You guys need to stop this thread.... especially as i just tossed a 6spd in a week or so ago.

Then again... I don't plan on power enough to break a 5spd.... so i better be safe :p

Bob I have a 6 speed with a broken housing let me know if you need some parts.

I too just installed a 6 speed after blowing my 5 speed so fingers crossed!

I should have the new motor in with the 6 speed in a couple weeks, tranny should be broken not long after that I imagine lol.

On a side note, none of my 5 speeds made any noises before breaking.

I have 16-hours on my 6-speed at 250whp and although I haven't had the best lap times in the world, the car is driven like a warrior. I have no symptoms or noises of any kind.

I also have a metal clutch...which needs to come to an end. TheSnowboardingQueer also had about 300whp if not more going through the trans too.

My 6 speed is making rattly gear stripping noises at high revs in second and 3rd gear maybe 4th too.

The 5 speeds I have broken 3 different ways. Stripping second or third was just a loud bang at full acceleration right about the point in the RPM range where I am making peak torque. The ones I broke the gear that drives the secondary shaft on all would make loud squealing noises on coast down after a hard use for a little while before Kablamo.

I need to get a spare before I take this one out and try and figure out what’s going on.

Dang it, driving a Miata this fast is expensive. I can’t afford some of the upgrades I want if I keep spending so much money keeping it rolling.

Bob

I might be interested in that. I need to get a spare first and I got to save up some cash flow first.

I got another 5 speed I can throw in if I have to for a couple weeks if it goes Kaboom.

Bob

Neither did I, but i somehow blew my 3rd gear @ 9psi on an sr20 turbo (2554) I would say sub 180whp. Now I'm blowing 4th in a 6-speed.

Truth.

Video of said blown 6-speed:
http://www.youtube.com/watch?v=c4nD0-FNiH0



I guess ill yank it out this week and see what kind of damage happened. To be fair to the transmission, I do not treat is nicely, lots and lots of fast/hard shifts. I can say i never really did a stand still burn out or clutch popping on it though.

Mike blew one up at TWS this weekend.

Doing what? Hardparking in the paddock? Making 900whp Mile passes? Please don't tell us, I thrive on suspense.

shit shit shit. How can the MSM trans be identified?

How much power is Mike putting down? Metal clutch?

what happened to the shot peened gears on all 6 speed 01+ trannies theory?

For what its worth, i have a 10AE tranny out of a 99.