Transmission

Contents
Are there any performance clutches for the Protegé?
What are the advantages of a lightened flywheel?
Are there any short shifters for the Protegé?
Ok, I want to get a limited-slip differential, are there any for the FWD Protegé?
Can I convert a U.S.-market 90-91 4WD Protegé into a J-spec GT-X Turbo “clone”?
What if I want a limited-slip differential for my GT-X?
Is the rear differential on the 4WD Protegé the same as the GT-X?
What kind of drivetrain upgrades can I perform and suit my needs?
Is it true that the MP3 has a stiffer clutch pedal (pressure plate)?
Is the MazdaSpeed Protegé's transmission stronger?
I turbocharged my 3rd generation Protegé and I also want to beef up the
  drivetrain components. What can I do?

Are there any stainless steel braided clutch lines for the Protegé?



Are there any performance clutches for the Protegé?
    ACT, Centerforce, Clutchmasters and Clutchnet have available clutches for the
    Protegé. Tilton also makes a clutch for the 2nd generation Protegé ES and is
    available from Mazda Motorsports. Exedy has also recently released an organic
    sport clutch kit for the 3rd generation 2.0l
Protegé's and has a pressure plate set
    load of 700kgf.  MazdaSpeed clutches are available for the 4WD 1st generation
   
and 2nd generations. The part numbers are:
      1st generations 4WD:
        QN2B-16-490 clutch set
        QN2B-16-410 clutch cover (included in "clutch set", set load is 700kgf)
        QN2B-16-460 clutch disc (230mm metalic 3 puck type, incl'd in "clutch set")
      2nd generations:
        9DP5-16-410 clutch cover (95 1.8l only, discontinued)
        QEP5-16-460 clutch disc (95 1.8l only)
        9DM5-16-410 clutch cover (all 1.5l and 96-98 1.8l, discontinued)
        9DM5-15-460 clutch disc (all 1.5l and 96-98 1.8l, discontinued)
    MazdaSpeed has released a chromoly flywheel (part # FS9P-11-500) for the
    G15M-R transmission.
3rd generation 2.0l owners who want easy engagement,
    relatively decent tollerance to performance driving and good daily drivability, the
    clutch assembly from the MazdaSpeed Protegé is also an option.
    The part numbers for the MazdaSpeed Protegé's clutch are:
      LF03-16-460 clutch disc
      LF02-16-410 pressure plate
      G561-16-510B release bearing (also used in FC RX-7)
    A heavy duty performance release bearing from MazdaSpeed is also available.
    It is designed to handle twin plate metallic clutches and 8000rpm use. It is also
    suitable for use with a conventional single plate clutch. Increased or similar
    reliability (to stock) is possible with this bearing when a high force pressure
    plate is used. The part number is QCC5-16-510 and is compatible with all
    BG (1st generations) 4WD models, 95 ES (1.8l), and all 2.0l 3rd generations.
    This bearing must be used with the upgraded release fork the MazdaSpeed
    Protegé has on 3rd generations. The transmission case will also have to be
    grinded down for the bearing to fit in the 3rd generation's transmission.
    The clutch release fork was also beefed up on the MazdaSpeed Protegé, so
    for 3rd generation owners with the 2.0l engine, these parts are also
    recommended:
      KL03-16-520A clutch release fork
      F202-16-102A clutch release fork pin
    It maybe hard to find a performance clutch kit "for" the Mazda3 right now,
    but the good news is, any pressure plate, and clutch disc meant for the 2.0l
    3rd generation Protegé (G15M-R transmission) will work with the Mazda3
    perfectly fine. The flywheel and pilot bearing are NOT interchangable how-
    ever. MazdaSpeed USA now has a clutch kit and flywheel for the Mazda3.
    The part numbers are:
      RAMS-8M-L01 clutch kit
      RAMS-8M-L03 flywheel (weight: 6.3kg)


What are the advantages of a lightened flywheel?
    A lightened flywheel will naturally reduce the weight of your car. It will
    also reduce the inertial mass required for the engine to spin. It will
    allow quicker shifts and easier rev matching due to the reduced mass.
    Quicker shifting is the result of faster RPM drops from the reduced
    inertia and will result in longer lasting gear synchronizers. Slippage of
    the clutch will be necessary when starting from a stand-still due to the
    reduced inertia.


Are there any short shifters for the Protegé?
    Pacesetter makes a short throw shifter for the 1st generation Protegé. B&M
    makes a short shifter for all FWD Protegé's. If you own a 3rd generation,
    you
can also get the short shifter from the MazdaSpeed Protegé. The MP3
    shifter's throw is the same as the stock one, the shifter height is just shortened
    for a sporty look. Use of the MP3's shifter will require a new shift knob
    because of the different thread size. Kartboy also makes a short throw shifter
    for the Protegé and has a slightly longer throw than the B&M shifter. Kartboy
    also make shift rod stabilizer bushings. TWM has a short shifter that has the
    shortest throw in the market. C's makes an adjustable throw short shifter for
    the FWD and 4WD models. Corksport also sells brozoil shifter bushings that
    will fit the B&M, Kartboy, and TWM short shifters. If you have the
    Pacesetter short shifter, the bronzoil bushings will only fit on the transmission
    side of the shift linkage. MazdaSpeed USA also just released a short shifter
    for the Mazda3 (not compatible with 6 speeds). The part number is
    GRMS-8M-L11. ARK and TWM also just released short shifters for the
    Mazda3. Do understand that setting too
short of a throw can destroy your gear
    synchronizers much faster. Short
shifters makes shifting much faster, but at a
    toll of the gear
synchronizers. Remember to shift softly with some finesse!


Ok, I want to get a limited-slip differential, are there any for the FWD Protegé?
    Yes, there are Quaife LSD's available from Mazda Motorsports, they are about
    $1200. It is indeed expensive. They are available for the G-series trans-
    missions and the F-series transmissions. The former will fit all FWD 1st
    generations and 2.0 liter 3rd generations. The latter will fit on 2nd gen-
    erations and other 3rd generations. MFactory recently released a line of helical
    gear LSDs that are much cheaper than the Quaife LSDs. There are MFactory
    LSDs for both the early G-series transmissions and the later ones, which means
    their LSDs are the cheapest solution for 1st generations! An even cheaper
    solution is to get the Tochigi Fuji Sangyo 2 way LSD from the MazdaSpeed
    Protegé. The piece runs for a little over $600 and is a great deal. It is a direct
    swap to the G15M-R and 95 ES's G25M-R, but with some modifcations, it may
    fit the other G-series transmissions. The part number is
GS01-27-190A. The LSD
    is not machined to accommodate the speedometer gear. Use of the speedometer
    gear is not required for ABS models (3rd generations/BJ models only). Installation
    of the speedometer gear requires the differential to be machined or the plastic
    speedometer gear to be grinded down on the inside for the differential to accept it.
    Either method works, however machining the differential is recommended as it will
    not weaken the speedometer gear. A 2nd revised LSD has been released to
    replace the original design (and in doing so, the original type is no longer available).
    The part number is GSY1-27-190.

    Alternatively, 1st, and 2nd generation owners can try to source the viscous LSD
    that was optional in Japan. The Infini Familia came standard with the viscous LSD.
     For the G5M-R: G040-27-190 (4.105 ring gear ratio)
     For the G25M-R: G565-27-190A (4.105 ring gear ratio)
     For all F25M-R (I doubt it will fit an F5M-R, you're on your own if you do!):
     4.105 ring gear ratio: F046-27-190B
     4.388 ring gear ratio: F045-27-190B
     The F25M-R viscous LSD will also work with 3rd generations.

     MazdaSpeed also used to have 1.5 way  LSDs for the G25M-R and F25M-R
     transmissions.
     The part numbers are:
       9B1A-79-960 G25M-R 1.5 way LSD
       9B2A-79-960 F25M-R 1.5 way LSD

     NOTE: straight forward "bolt on" installation can ONLY be done if you DO NOT
     change the final drive ratio of your transaxle. If you choose to change the final drive
     ratio, you MUST change the pinion gear that is pressed onto the counter shaft of
     the transaxle. The appropriate pinion gear can be sourced from another F25M-R
     that has the final drive ratio you want. In Mazda transaxles, the pinion gear is
     machined into the counter shaft, therefore all counter gears must be pressed out
     and pressed into the replacement shaft.

     For the counter shaft that has the:
     4.105 ring gear: F5D3-17-301
     4.388 ring gear: F5D4-17-301


Can I convert a U.S.-market 90-91 4WD Protegé into a J-spec GT-X Turbo “clone”?
    Supposedly it is possible, but almost nobody has done it outside of professional rally
    circles. The U.S./Canadian 4WD model has the correct rear floorpan to clear the
    required AWD hardware; however, the fragile 4WD drivetrain used in these cars
    shares only the gearset and gearbox of the stronger GT-X drivetrain. A 180+ hp
    turbo engine should NEVER be installed in a US/Canadian 4WD car with the wimpy
    stock drivetrain it will probably break in a matter of minutes!  An 4WD drivetrain
    will not fit into a FWD Protegé without serious custom modifications to the car’s
    frame and floor to clear the driveshaft and rear differential.

    In order to build a reliable GT-X clone, you will not only need to obviously swap
    the engine to the BP-ZET, but you will also have to use the GT-X's transmission.
    Most of the time, importers import the BP-ZET without the transmission because
    it is unwanted by everyone in North America, however you might be able to cut a
    good deal in getting that because of such! Just make sure you request you want the
    transmission when you order your engine. Frank Schmitt has done a GT-X
    conversion on his 1990 4WD Protegé. You can check out the info about his car
    and the swap at: http://protege4wd.vista.com/


What if I want a limited-slip differential for my GT-X/4WD?

    The 323/Familia GT-X and later JDM only 4WD models (BHAs and BJs) came
    with a viscous coupling LSD for the center differential, but not for the rear
    differential. The GT-R and GT-Ae also has this setup in addition to a viscous
    coupling rear LSD. The LSD equiped rear differential only came on the 323/Familia
    GT-R and GT-Ae from the factory. Finding a used GT-R rear differential will be
    near impossible, however the parts needed to correctly make a GT-R rear different-
    ial is available from 90-93 LSD equiped Miata. Keep in mind that not all of the
    90-93 Miatas came with LSDs, so look around at the junk yard! If you choose not
    to have the viscous LSD (which may prove inadequate) and use the stronger after-
    market LSDs, you can skip the junkyard trip if you want. However, you will still
    need the differential's output shafts which will set you back about $200 retail from
    the dealer. Regardless of what you choose to do, you will have to rebuild the
    differential unless you are very lucky to get a GT-R one from a Japanese junk
    yard! All the other parts such as the axles bolt on to the LSD housing (meaning the
    GT-X and GT-R axles are the same). For those few lucky ones out there with a
    4WD BHA or BJ model, all of this information also applies. In fact, the entire rear
    differential housing from a GT-R will bolt in! So in otherwords, installation of a
    rear LSD on a 4WD Sport20 will increase corning ability to what the GT-R had
    made a legend of!
    As reference, here are the factory part numbers needed for the conversion:
       T015-27-270A, right differential output shaft
       T015-27-280A, left differential output shaft
       T016-27-200C, viscous LSD (don't need this if installing aftermarket LSD)
    MazdaSpeed also sells clutch type LSDs (you will need the open diff output shafts):
       QN1A-79-960, 1.5 way LSD (rebuildable with kit part #: QEN1-79-960)
       QN10-64-A00, 2 way LSD (rebuildable with kit part #: QEN1-79-960)
       T005-27-270B, left & right open differential output shaft (needs 2)
    Kaaz and Cusco also make LSDs specific to the Miata and Familia GT-R

    MazdaSpeed used to sell a helical front LSD and an upgraded viscous center LSD
    also (they are no longer available):
       9N4B-27-200, front LSD
       9N4B-27-580, viscous center LSD


Is the rear differential on the 4WD
Protegé the same as the GT-X?
    Yes, they are exactly the same.


What kind of drivetrain upgrades can I perform and suit my needs?
    There are certain things you can do to upgrade your drivetrain system. How-
    ever most advanced upgrades will have to be done custom by a reputable
    machine shop. There various different upgrades possible to suit different
    applications. Again, our Nissan friends have a nice detailed technical
    explanations on various drivetrain upgrades. Do note some of the things in
    that document do not apply to our Protegés. Our Protegés feature a hydraulic
    clutch system, whereas the Sentras have a cable system. Do note Jim Wolf
    Technology and Stillen do not make parts for Protegés because they are Nissan
    oriented. For the most part, most the information provided are universal for
    all cars and is actually useful to us. You can find the detailed drivetrain
    information here: http://www.se-r.net/car_info/drivetrain_tips.html


Is it true that the MP3 has a stiffer clutch pedal (pressure plate)?

    No, all the transmission components used in the MP3 are the same as the one
    used in the normal 2.0 liter (LX/ES) sedan.


Is the MazdaSpeed Protegé's transmission stronger?
    No, the transmission's internals are the same as the normal Protegé's, except
    for the LSD.


I turbocharged my 3rd generation Protegé and I also want to beef up the
drivetrain components. What can I do?

    You can start by upgrading the differential to a limited-slip type. You can then
    upgrade the axles to 24mm diameter ones from the MazdaSpeed Protegé.
    The part number for the axles are:
       GA33-25-50XA right axle
       GD49-25-60XA left axle


Are there any stainless steel braided clutch lines for the Protegé?
    As of this time, there are no known premade clutch line kits for the 1st and 2nd
    generation Protegé's (which share the same factory clutch line as the MX-3).
    AutoExe sells a clutch line kit for the 3rd generation 2.0l Protegé's. RR Racing
    and Corksport also sells a clutch line kit for the MX-6/Probe (which share the
    same factory clutch line as the 2.0l Protegé's).


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