Anyone have better gears yet???

sr240z said:
How Much Would Straight Cut Gears Cost? I'm Sure There Are 40+ Protege's And Other Mazdas That Share Gearbox Gears Out There.
Click to expand...


OK, so I have been talking with various people lately in the racing world about this problem. I think I may have finally come across someone who has the past experience in front wheel drive racing trannies to understand what is needed here. As well, he is willing to do a very short run of gears or whatever is needed to make the tranny work. Of course, the shorter the run the more expensive each gear is....

I will be taking a complete gearbox to him late in September once the race season is over to work on in the offseason. Once I get more info on what he thinks is causing the problems and what the fixes will be I will pass them on.As well, I hope to have prices if anyone else is interested. I will be going forward with this wether anyone else is interested or not.....

Take Care,
Tom
Doc B Racing
 
MP3racer said:
OK, so I have been talking with various people lately in the racing world about this problem. I think I may have finally come across someone who has the past experience in front wheel drive racing trannies to understand what is needed here. As well, he is willing to do a very short run of gears or whatever is needed to make the tranny work. Of course, the shorter the run the more expensive each gear is....

I will be taking a complete gearbox to him late in September once the race season is over to work on in the offseason. Once I get more info on what he thinks is causing the problems and what the fixes will be I will pass them on.As well, I hope to have prices if anyone else is interested. I will be going forward with this wether anyone else is interested or not.....

Take Care,
Tom
Doc B Racing
Click to expand...
Par Gearsets make a full swap for our car. i'm intersted in that. but lmk about price. i'm looking for 1-3 straight cut, 4&5 helical and a longer 5th(lower RPM cruising speed)
 
MP3racer said:
I'm not sure I agree the problem lies with oiling to the gears....
We have had broken gears evaluated by a metallurgist and the determination was that the problem stemmed from the gears being "too hard". Mazda manufactures the gears with the intention to make them last long and wear better, therfore increasing their hardness. To help prevent breakage at the root of the gear teeth (as has happened with most racing protege transmissions) you need a gear with a lower rockwell hardness (very simplified explanation here) to "bend" a bit to absorb the shock and stress and not crack and break. Once one of the teeth cracks and then shears off at its root the counter gear act like a chisel and just shears off the rest of the teeth on that gear.

As for the aftermarket gear sets, Mazda had some done for the NA World challenge cars but the ratios are way off for our car with a turbo. Also, the other manufacturer MAM sourced Mazda had tried as well with very poor results.

We have looked at re-heat treating the gears. The problem is that to increase hardness is easy. To decrease it there are problems with dimensionsal stability and so far no one wants to attempt it.

I have another company interested in doing some gears but the minimum number of sets they need to get started is the stumbling block....

So I guess for now I too may try the band-aid of the GTX gears.....

Thanks for the input!
Click to expand...


hey Buddie. I Have Custome Made TBK Performance Gears and they were measure and Tested and holds around 600 HP. im putting these in my tranny with Cryo Treatment Everything including these gears. i can Get you Prices for the gears also tell me what ratios do you need them. also what gears you want to change, these people manufactor their own gears so.. GTX gears are not strong enough for type of abuse..
 
Mazdaspeed2oo35 said:
hey Buddie. I Have Custome Made TBK Performance Gears and they were measure and Tested and holds around 600 HP. im putting these in my tranny with Cryo Treatment Everything including these gears. i can Get you Prices for the gears also tell me what ratios do you need them. also what gears you want to change, these people manufactor their own gears so.. GTX gears are not strong enough for type of abuse..
Click to expand...

i just want what i said earlier. and i dunno what kinda ratios. everyone but the 5th is fine.
 
what GTX Gears are best use for the upgrade in strength for our trannies. (Year of the GTX (awd/fwd))? I seriously dont have 4g's for a fully built gear set up w/ tranny.
 
Last edited:
Don't know if this will help u but check with PAR engineering in Aus. The have gears made. That's where I got mine for my 3. I know they have them for Proteges. Just a thought. Tri-point used them for a while too.
 
it depends on what u want... drop them an email. web site is par-engineering.com
 
a gear set isn't going to solve the problem. I've seen a few G series boxes destroyed under high power - problem largely is shaft seperation (which causes the gears to clash), which is down to a p!ssweak gearbox casing.

If you manage to arrest that, the next weakest link is the end bearing.

Best bet if you want to hold serious power, is to look at retrofitting a stronger gear box, with an adapter plate and suitable axles etc.
 
The guys at PAR can build you a full tranny if that's the route u wanna go... I was going to put an MTX75 in my car but the gears solved my problem so...
 
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