transmissions
July-24th-2003, 08:53 PM
#21
Use this to install stuff
Join Date: Mar 2002
Location: State College, PA
Posts: 1,069
Originally posted by unleashedzx2
I wanna hear from any one here who is putting some good amount of ponies under the hood, how did you improve on these shitty Mazda trannies from not breaking?
I wanna hear from any one here who is putting some good amount of ponies under the hood, how did you improve on these shitty Mazda trannies from not breaking?
This is were things are getting skewed and misleading...No one on this board that I know of has put enough power/torque into a G-15M-R 5-speed gearbox to destroy it becuase of that...Most of the people having gearbox problems had relatively stock engines with the exception of a few bolt-ons and THEY destroyed the box...IMO it is shifting habits that are limiting the gearbox so far for the most part. It is still unclear to me who coined the fact that the box can only handle 225whp or whatever and I have never seen anyone on this board with a 225whp FS/G15M-R...The aluminum case is definately not the strongest, and there are some potential weaknesses with the spider gears of the diff...but other than that it is fine...The notion of weak syncros and shift forks have little to do with the maximum amount of torque it can handle and more to do with how much bullshit it can take from a poor driver...Shift it like an idiot and chances are it will break, regardless of whether it is stock or heavily modified...
In comparison there are quite a few 2nd gen. Probe GT owners with upper 285whp numbers and nearly that much torque, on a gearbox that is for the most part identical...same internals, same ratios, similar aluminum case...
I don't know why everyone is worrying about it so much, especially when none of us have nearly enough power to make it an issue...I am just simply pointing out that a lot of these issues about gearbox strength are more related to driver abuse than engine output...
July-24th-2003, 11:44 PM
#23
Protege Newbie
Join Date: May 2003
Location: A lil place called SoHo
Posts: 8
I'm only aiming for about 200-250 whp just as a sleeper on Boost, just asking cuz i wasnt sure if i might break something cuz of that. i'm a good shifter though, i shift softly but quickly with the flick of the wrist. Also i heard with a short shifter, do u wear out the synchros quicker or is this also of poor driving?
Last edited by unleashedzx2; July-25th-2003 at 10:44 AM.
July-25th-2003, 06:55 PM
#24
Protege Enthusiast
Join Date: May 2003
Posts: 69
Originally posted by Installshield
This is were things are getting skewed and misleading...No one on this board that I know of has put enough power/torque into a G-15M-R 5-speed gearbox to destroy it becuase of that...Most of the people having gearbox problems had relatively stock engines with the exception of a few bolt-ons and THEY destroyed the box...IMO it is shifting habits that are limiting the gearbox so far for the most part. It is still unclear to me who coined the fact that the box can only handle 225whp or whatever and I have never seen anyone on this board with a 225whp FS/G15M-R...The aluminum case is definately not the strongest, and there are some potential weaknesses with the spider gears of the diff...but other than that it is fine...The notion of weak syncros and shift forks have little to do with the maximum amount of torque it can handle and more to do with how much bullshit it can take from a poor driver...Shift it like an idiot and chances are it will break, regardless of whether it is stock or heavily modified...
In comparison there are quite a few 2nd gen. Probe GT owners with upper 285whp numbers and nearly that much torque, on a gearbox that is for the most part identical...same internals, same ratios, similar aluminum case...
I don't know why everyone is worrying about it so much, especially when none of us have nearly enough power to make it an issue...I am just simply pointing out that a lot of these issues about gearbox strength are more related to driver abuse than engine output...
This is were things are getting skewed and misleading...No one on this board that I know of has put enough power/torque into a G-15M-R 5-speed gearbox to destroy it becuase of that...Most of the people having gearbox problems had relatively stock engines with the exception of a few bolt-ons and THEY destroyed the box...IMO it is shifting habits that are limiting the gearbox so far for the most part. It is still unclear to me who coined the fact that the box can only handle 225whp or whatever and I have never seen anyone on this board with a 225whp FS/G15M-R...The aluminum case is definately not the strongest, and there are some potential weaknesses with the spider gears of the diff...but other than that it is fine...The notion of weak syncros and shift forks have little to do with the maximum amount of torque it can handle and more to do with how much bullshit it can take from a poor driver...Shift it like an idiot and chances are it will break, regardless of whether it is stock or heavily modified...
In comparison there are quite a few 2nd gen. Probe GT owners with upper 285whp numbers and nearly that much torque, on a gearbox that is for the most part identical...same internals, same ratios, similar aluminum case...
I don't know why everyone is worrying about it so much, especially when none of us have nearly enough power to make it an issue...I am just simply pointing out that a lot of these issues about gearbox strength are more related to driver abuse than engine output...
he probe uses a MTx75 transmission which is significantly stronger than the G series transmission.
July-25th-2003, 06:59 PM
#25
Registered User
Join Date: Jun 2003
Location: San Diego, CA
Posts: 290
Originally posted by unleashedzx2
I'm only aiming for about 200-250 whp just as a sleeper on Boost, just asking cuz i wasnt sure if i might break something cuz of that. i'm a good shifter though, i shift softly but quickly with the flick of the wrist. Also i heard with a short shifter, do u wear out the synchros quicker or is this also of poor driving?
I'm only aiming for about 200-250 whp just as a sleeper on Boost, just asking cuz i wasnt sure if i might break something cuz of that. i'm a good shifter though, i shift softly but quickly with the flick of the wrist. Also i heard with a short shifter, do u wear out the synchros quicker or is this also of poor driving?
July-25th-2003, 07:49 PM
#26
formerly chastan
Join Date: Jul 2002
Location: California, USA
Posts: 2,350
Originally posted by Gregersonsalvag
he probe uses a MTx75 transmission which is significantly stronger than the G series transmission.
he probe uses a MTx75 transmission which is significantly stronger than the G series transmission.
Last edited by UCSBgeek; July-25th-2003 at 07:55 PM.
July-26th-2003, 01:14 PM
#27
Use this to install stuff
Join Date: Mar 2002
Location: State College, PA
Posts: 1,069
Originally posted by toucci
the syncros only have to do with making the layshaft match the speed of the gear you want to enter. The short shifter has no effect on that. I presume if you are used to double clutching with the regular one and do it less effectively with the short shifter it would cause more wear on the syncros.
the syncros only have to do with making the layshaft match the speed of the gear you want to enter. The short shifter has no effect on that. I presume if you are used to double clutching with the regular one and do it less effectively with the short shifter it would cause more wear on the syncros.
July-26th-2003, 01:17 PM
#28
Use this to install stuff
Join Date: Mar 2002
Location: State College, PA
Posts: 1,069
Originally posted by Chastan
wrong
wrong
And FWIW There are just as many shift fork problems with stock Probe GT's/MX-6's/626 V6 as we have...and I didn't think anything was significantly stronger...
July-27th-2003, 01:55 PM
#30
formerly chastan
Join Date: Jul 2002
Location: California, USA
Posts: 2,350
Originally posted by Gregersonsalvag
Thats why the zx2 owners did'nt get the tranny cause it was the mtx75. Its the same as the Focus.
Thats why the zx2 owners did'nt get the tranny cause it was the mtx75. Its the same as the Focus.