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-   Suspension, Brakes, Drivetrain (https://www.miataturbo.net/suspension-brakes-drivetrain-49/)
-   -   Who has broken a 6 speed? (https://www.miataturbo.net/suspension-brakes-drivetrain-49/who-has-broken-6-speed-46575/)

thesnowboarder 04-30-2010 08:08 PM


Originally Posted by Savington (Post 565912)
Nick, how much do you flatshift the car? When I stripped it I removed the clutch switches and disabled the flatshift since I felt it was too hard on the transmission. I know you used it last year at MRLS a little bit.

Maybe less than 30 times total. I haven't used it since MRLS last year.

FWIW i have an ACT HD w/ 6 puck sprung clutch. MT90 in the tranny with less than 4k miles on it (the fluid, aprox 70k on the tranny itself).

TrackTestedMiata 05-10-2010 05:03 PM

ive heard this before, the msm and 01+ trans are the same, they advertise the cryo/shotpeened gears on the msm as a selling feature, if you knew a sport had em, less reason for you to buy a msm, i guess.

Savington 05-10-2010 05:24 PM

They upgraded the halfshafts for the MSM, though. I wouldn't be surprised if they shotpeened only the MSM boxes.

Splitime 05-10-2010 05:29 PM

4k for fluid on a trans that sees track duty? That seems like a bit long.

swimming108 05-10-2010 05:35 PM


Originally Posted by djp0623 (Post 560790)
.........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???


Originally Posted by 90GTK450 (Post 561211)
Bob I have a 6 speed with a broken housing let me know if you need some parts.

sounds like there are a bunch of people with extra parts. Anyone happen to have a 99-00 shifter for a 6speed? The one with 2 slots?

hustler 05-10-2010 05:36 PM


Originally Posted by Splitime (Post 570742)
4k for fluid on a trans that sees track duty? That seems like a bit long.

how many trips to the track did it see in those 4k miles?

miatauser884 05-10-2010 08:23 PM


Originally Posted by swimming108 (Post 570746)
sounds like there are a bunch of people with extra parts. Anyone happen to have a 99-00 shifter for a 6speed? The one with 2 slots?

I've got a good front and middle housing. Sounds like if we all get together we can build a six speed

thesnowboarder 05-18-2010 06:54 PM

Where is everyone getting there 6-speeds from?

It seems whenever i need one, i can't find one.

jasonb 05-18-2010 07:12 PM


Originally Posted by thesnowboarder (Post 574847)
Where is everyone getting there 6-speeds from?

It seems whenever i need one, i can't find one.

http://sfbay.craigslist.org/sby/pts/1741452545.html

cl mystery 6spd ('99) for 800, but that may not be an upgrade

jasonb 05-18-2010 07:20 PM


Originally Posted by thesnowboarder (Post 574847)
Where is everyone getting there 6-speeds from?

It seems whenever i need one, i can't find one.

random crap generator just produced:

fwiw, quaife gearset (5spd) for $1876

http://www.autotech.com/quaife/news.htm

hustler 05-21-2010 08:27 AM


Originally Posted by jasonb (Post 574870)
random crap generator just produced:

fwiw, quaife gearset (5spd) for $1876

http://www.autotech.com/quaife/news.htm

lol

spd579 05-25-2010 12:02 PM

Quck question for you guys that might know. I'm going to build a 1.8 to drop in my 91 but the syncro in 3rd in my 1.6 is iffy. Can I put a 6 speed in my 1.6 without modification and then put it on the 1.8 when I'm done with the build? Or will it require some modification to go on the 1.6 that will inable me to put on the 1.8 when I'm ready?

fooger03 05-25-2010 01:05 PM

short answer: yes

a 5-speed from a '94 will bolt right into a '90, and a 6-speed from an '04 will bolt right into a '94.

By that logic, a 6-speed from an '04 will bolt right into a '90. You will use your 1.6 driveshaft, and speed sensor assembly. You will cut the wiring connectors from one of your 5-speed tranny sensors and solder them onto the associated 6-speed tranny sensor. (remove the single black plastic connector on the 6-speed to solder on the 2 bullet connectors from the 5-speed) The 2 white plastic connectors are unchanged from '90 - 2004.

spd579 05-25-2010 01:26 PM


Originally Posted by fooger03 (Post 577975)
short answer: yes

a 5-speed from a '94 will bolt right into a '90, and a 6-speed from an '04 will bolt right into a '94.

By that logic, a 6-speed from an '04 will bolt right into a '90. You will use your 1.6 driveshaft, and speed sensor assembly. You will cut the wiring connectors from one of your 5-speed tranny sensors and solder them onto the associated 6-speed tranny sensor. (remove the single black plastic connector on the 6-speed to solder on the 2 bullet connectors from the 5-speed) The 2 white plastic connectors are unchanged from '90 - 2004.

Is sodering necessary? can wire crimps not work or just not as sturdy? I would think a soder might short somehow if it got wet? dont mean to sound retarted but do you or any one know of a link that some one did this with pics? I have a MSM rear end I need to put in and I was looking for a MSM tranny but I acnt find one for under a G....are they worth it? I found another 5 speed for $125 in good shape. one more gear and some stirdyness for almost $900 more dollars.:vash:

fooger03 05-25-2010 04:20 PM

Some claim that the MSM transmission was made stronger with shot-peened gears

There are no unique, identifying part numbers/diagrams/etc. that would act as proof that there are 2 seperate types of gears for the MSM vs. Non-MSM transmissions.

A common thought is that all 6-speed gears are shot-peened, the MSM's just used it as a selling point.

You could use wire crimps as the circuit is not a potentiometer; but rather, it is a simple open/closed circuit. Perfect continuity is not paramount in the application. For the love of god, don't use wire nuts.

A solder joint will not short out if it gets wet, assuming you've properly insulated the wiring, which you would do anyways if you crimped it. After you have completed the wiring, regardless of crimp, solder, or nut, you will always insulate the wire. The best way is with heat shrink tubing, electrical taped at the ends. The most common way (and not necessarily a bad way) is simply to electrical tape both joints seperately, and then e-tape them together.

With regard to your MSM rear end. You will require the MSM axles to finish the install, as the MSM rear end will not mate up with N/A axles. If you do not have the MSM axles, do not attempt to install the MSM rear end. Any NA/NB transmission will mate up with any NA/NB rear end, driveshafts must match the rear end (1.6 rear end uses a longer driveshaft)

spd579 05-25-2010 04:54 PM


Originally Posted by fooger03 (Post 578172)
With regard to your MSM rear end. You will require the MSM axles to finish the install, as the MSM rear end will not mate up with N/A axles. If you do not have the MSM axles, do not attempt to install the MSM rear end. Any NA/NB transmission will mate up with any NA/NB rear end, driveshafts must match the rear end (1.6 rear end uses a longer driveshaft)

Thanks, I have the axles and drive shaft from a 94+ (not exactly sure what year but I've read any will work) I just need a carrier casing and it's impossible to find for a reasonable price. Anyone have a spare?:x:

fooger03 05-25-2010 05:08 PM

you're planning to use regular '94+ axles with the MSM rear end?

if so, re-read my previous post, again and agin, until it makes sense

spd579 05-25-2010 11:47 PM


Originally Posted by fooger03 (Post 578210)
you're planning to use regular '94+ axles with the MSM rear end?

if so, re-read my previous post, again and agin, until it makes sense

Driveshaft from any 1.8 will work with the MSM rear.

fooger03 05-26-2010 08:20 AM


Originally Posted by spd579 (Post 578491)
Driveshaft from any 1.8 will work with the MSM rear.

You are correct. I am not arguing with you.

Go back a third time, and re-read my post again and again...until you understand, without question...I'll even quote it for you so you dont have to waste time scrolling up:


Originally Posted by fooger03 (Post 578172)
Some claim that the MSM transmission was made stronger with shot-peened gears

There are no unique, identifying part numbers/diagrams/etc. that would act as proof that there are 2 seperate types of gears for the MSM vs. Non-MSM transmissions.

A common thought is that all 6-speed gears are shot-peened, the MSM's just used it as a selling point.

You could use wire crimps as the circuit is not a potentiometer; but rather, it is a simple open/closed circuit. Perfect continuity is not paramount in the application. For the love of god, don't use wire nuts.

A solder joint will not short out if it gets wet, assuming you've properly insulated the wiring, which you would do anyways if you crimped it. After you have completed the wiring, regardless of crimp, solder, or nut, you will always insulate the wire. The best way is with heat shrink tubing, electrical taped at the ends. The most common way (and not necessarily a bad way) is simply to electrical tape both joints seperately, and then e-tape them together.

With regard to your MSM rear end. You will require the MSM axles to finish the install, as the MSM rear end will not mate up with N/A axles. If you do not have the MSM axles, do not attempt to install the MSM rear end. Any NA/NB transmission will mate up with any NA/NB rear end, driveshafts must match the rear end (1.6 rear end uses a longer driveshaft)


Here's a cheat sheet.

The driveshaft will work. The axles will not.

spd579 05-26-2010 08:42 AM

I'm sorry, I see where you got confused on my initial post.....


Originally Posted by spd579 (Post 578203)
Thanks, I have the axles from a MSM and drive shaft from a 94+ (not exactly sure what year but I've read any will work) I just need a carrier casing and it's impossible to find for a reasonable price. Anyone have a spare?:x:

Fixed;)


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