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hello, i'm sorry but i don't own a protege (ducks from the stuff being thrown at him, heheh) but i own a ford escort zx2, which uses the mazda g5m transmission.

i'm just trying to find out more about these mazda transmissions, because we (the zx2ners) are in need of something stronger. quite frankly, the g5m is not working well with our cars and is barely holding together with the stock 130hp that our zetec motors are rated at, and those who have gotten much more power have gone through multiple tranny's.



what i really want to know is, are there any trannies relativley swappable with the g5m that can hold more power? what about the g15m-r?

any info would be great.

get a protege!

geez guy ligten up... whats stuck up your ass?
my comment wasnt supose to be taken so seriously....:mad:

hey

well, i not sure what exactly breaks first, but we have definatley have numerous problems. i honestly don't know too much about trannies, but i'm trying to figure all this out.

according to one person, some zx2s actually came with the g15m-r, but it isnt much different than the g5m

i dunno, i'm just trying to gather differnt info and see what options we have, but i think the only stronger tranny that will work with ours is the focus ones

if my tranny ever blows, who knows, maybe it won't, heh, btw, i'm supercharging my zx2, the first one :) , but if it ever does, hopefully i'll have saved enough $$ to swap in a focus tranny, or there are a few shops i've heard of that can "bullet proof" the trannies. (protech, level 10)


but still, if you guys know of any trannnies that are swappable with the g5m/g15m-r, and considerably stronger...let me know!

ha ha. yea its a long shot

thanks anyways :)

As Jesse said earlier, the main differences are in the bell housings I guess, but the guts are similar and can handle similar loads...

the Mazdaspeed Protoge uses a version of the G-15M-R gearbox (only difference I think is the LSD, plus a stronger clutch used...which only increases the stress on the other box internals) and is more than enough to handle the FS-DE(T)'s 170hp and more importantly the 155lb/ft of torgue with a full 50k mile warranty...

My guess is that the ZX2 owners you are talking about are doing a combination of adding power, but worse shifting to hard and unsmoothly. G-series boxes are prone to shift fork problems when hurried beyond what they can handle, meaning when they are shifted way to hard. the case is aluminum also, and a few guys I know of have completely cracked them...

I dont own a Mazda either but I Want a RX8, <ducks>:D anyway the G5M tranny can only hold 250 Hp if it is babied but usually what goes out are either the shift forks-becuz ppl shift too hard and the synchros which wear out faster when ppl dump the clutch at hgh rpm's or is throwing a lot of power to the wheels... I also would like to know if i can swap out my tranny or somehow make it stronger becuz I'm gonna go heavily modded and need to be prepared:)

Get an auto.

Okay the big problems that we are having with the trannies on the zx2 are the differentials keep going due to weak spider gears and the syncros are in some performance applications of high reving are literally flying apart at 7600 rpms. Shift forks are only a problem for those who shift too hard or too fast. The way we figure it if we were to get better syncros and differentials the shift forks would have less work on them anyways because of the faster syncros and the differentials would'nt go up in smoke so quickly.

I also found this on mazda website that may be useful in the future.

The Mazda G5M five-speed is designed to give the four-cylinder engine line-up crisp, short-throw shifting feel and low shifting effort in true sports car style. It features new dual synchronization - a high power synchronization feature for responsively quick shifting, easier shift effort and precision engagement - for the first and second gears.

The auto is weaker and not as aggressive as a MTX and if the G15M-R is stronger, how much would it run on price? Or is cheaper to have a machine shop make stronger synchros and shift forks and drop a LSD while I'm at it?

The G15-R is slightly more sturdy and you could pick one up off of car-part.com for probably 400-600 bucks look up the mazda protoge third gen. Personally I would pickup a ford escape tranny which has the stronger differential gears in it not to mention more agressive gearing. But make sure you swap out the 2nd gear. Throw a lightwieght flywheel in there along with a a quafie lsd and you should be good to launch your hearts desire out. OH by the way syncros are worn out only when you say rev it really high and then shift it into a gear. If you rev match you will have far less problems with your syncros. Thus the reason if you want to shift faster you use an lightwieght flywheel so your revs drop faster.


Also if you get an atx and invest about 3k into it you could make a virtually indestructable tranny that when you are done with it you can sell it for about half what you paid for it easily.

With the G15-r I might as well get it cryo'd...and with the Escape Tranny I heard you can only get about 25mph out of 1st gear

I only get about 30mph out of the zx2 tranny. So its not a huge difference.

Are you for real? I Get 35 mph out of 1st at redline

I dunno. ALl I know is thats what I get out of first gear.