MTX swap, MX3 or MX6 trans to use...

[Nd4SpdSe]

In that link, reliable people in the know report that the 626 5th gears are in fact taller than the other G series cars. Yoda on this site has also said that he at one time had taken a 5th gear set from an 86' 323 GTR (Not totally certain there) for a really tall 0.68:1 5th gear ratio but that the plugs fouled because the rpm was too low at cruising speeds.

I haven't read that post in a while, I didn't remember that detail. I've heard the 323 gear swap too, I think that's in the thread at iMazda, not sure, but it's not something I've personally looked into, i'm not interested in swapping out the 5th gear. But if you want more info on it, check out iMazda.com, you'll have to register to see the thread, but there's a good one about the tranny gears and LSD.

FYI for those who are out of the know....the list below details the G-series mazda gear box:

I'm still wondering which is g5m-r and which is g25m-r? And if they are all the same strength or if some are stronger than others.

I don't have Mitchel1 on me, but if i remember think that the G5M-R is the 4.38 while the G25M-R is the 4.11 gearset.

Now, don't be fooled from that list, the trannies themselves aren't all interchangable, but it's the gears that are. If you have a V6, you need a V6 tranny if you want it to bolt up, but you can pick and choose from the gears within. I'm not sure if any of the gears are better, but the gears from the Escort Zx2 have better syncros, brass instead of copper. If there's a problem with the trannys, it's usually the syncros that go (usually in 3rd gear). If you want stronger, you could look at Cyrotreating them, the gears and even the case. I'm currently going with the Escort ZX2 gears with the MazdaSpeed Protege LSD.

[707-MX3]

Thanks for answering, Nd4SpdSe. I am putting a BP-ZE(stock for now, turbo it later) into my 93 mx-3 rs. So would the escort zx-2 tranny fit my engine or will I have to switch internals with a G25-R from a Protege LX(the car im getting my engine from).

[Nd4SpdSe]

Thanks for answering, Nd4SpdSe. I am putting a BP-ZE(stock for now, turbo it later) into my 93 mx-3 rs. So would the escort zx-2 tranny fit my engine or will I have to switch internals with a G25-R from a Protege LX(the car im getting my engine from).

Ahh, nice! As for the Escort ZX-2 tranny, I honestly couldn't tell you if it's bolts up. I guess the only way to find out is try, but that car uses a Ford Zetec motor, so it may not be at all compatible. If that's the gears you want, you'l be buying the tranny for the gears anyway, so you can just bolt it to the motor thats out of the car, see if it'll fit. I don't know if they'll work in a 4cyl, I dont see why not, but I can't confirm that, being a V6'er, I've only read about V6'ers doing that gearset swap. I know there are 4cyl guys that have looked into putting in a MSP LSD in their tranny, if you find threads about that, you may find more information on the gearest too.

[SmoothMX3]

Guess what? ... I have a zx2 sitting in my back yard. I fixed it up, and the diffy went out after spending 3 grand on the car. So i said screw it. and let it sit there, with its BRAND NEW motor. its still sitting there. Tranny is out. onlything that is wrong with the tranny is the diff is gone. let me know.. later

[Nd4SpdSe]

If the axles work, could always just put an MSP LSD in your Zx2 if the splines match up with the Escort axles

[studboy13]

so what are the top speeds of both? difference in gas milage? how much acceleration am i sacraficing?