The Ultimate Transmission Thread... Brainstorm Ideas Here!

[rurockn]

I thought it was confirmed a long time ago??
Hence why I keep mentioning ADAPTER PLATE and CUSTOM CV's

[95PGTTech]

Need to put an end to this MTX75=G25M crazyness :-)

Did you had both gear sets in your hand, disassembled them and changed gears between them. I suspect no.

http://www.sportcompactcarweb.com/pr...0205scc_focus/

Notice how the 5th gear placement is inside the case. Where on F,G,H Mazda trannys it is on the otside under a separated cover.

The input and output shaft are completely different from G series.

It is like claiming Mustang and RX-7 trannys are the same just because both are RWD and Mazda and Ford work together.

I've heard it called g25m, grm5, and g-series of the M5? which is correct?

anyways, back on topic, I'd like to edit my original theories. I still stick with the "we, do not, in any ****ing way, have a piece of shit MTX75 transmission (2nd Gens). I stick with the "we have a M5 transmission" statement (GRM5 for long...). After getting some measurements from the junkyard, I do not think they are compatible.

we can swap internals (gears 1-5, R) with other GRM5's. some have different cases, so we can't swap entire trans.'s with them, and because of this we can't swap final drive's with most.

[turbo_KL]

The MTX75 from Ford has absolutely nothing in common with any Mazda transmission.
This is what I wanted to point out.

But there is this G series transmission from Mazda that was fitted to anything from an Escort, 323, Protege (the latest Mazdaspeed also), MX-3, MX-6, Probe, 626, Tribute and some JDM specials from Mazda.

Since the Escort is basically a 323 they used a lot of parts from this platform , transmission included. At the same time they also fitted some MTX75 transmissions to the Escort with some of the Ford engines. It seems this is what is causing all the misunderstandings here.

[95PGTTech]

The MTX75 from Ford has absolutely nothing in common with any Mazda transmission.
This is what I wanted to point out.

But there is this G series transmission from Mazda that was fitted to anything from an Escort, 323, Protege (the latest Mazdaspeed also), MX-3, MX-6, Probe, 626, Tribute and some JDM specials from Mazda.

Since the Escort is basically a 323 they used a lot of parts from this platform , transmission included. At the same time they also fitted some MTX75 transmissions to the Escort with some of the Ford engines. It seems this is what is causing all the misunderstandings here.

yeah I've found codes like G25M, G5MR, G25M-5, G15M-R, and F-25MR. I know that G25M means (g-series of M5), and I believe we have the f-series, correct? that would make us F25M or F25M-R?

[Smuffy]

** *** **** * ***** ** *** its because many cheaper gear oils have very strong solvents in them that can eat away at seals and/or bronze/brass parts inside the transmission. Ever noticed that Honda recommends 10w-30 petroleum engine oil for their transmissions? Some Nissan's recommend 5w-20 or ATX. This is the same reason that when sulfur's were first introduced into gear oils in the 70/80's people had so many seal problems on their older model cars with 100% rubber seals. Sulfur ate away the grime at the surface that had built up over the years and made it to the old seals surface which had worn, and leaked. Ask any old Muncie or Rock-Crusher guy and hell tell you about leaks.

I wouldn't weld the pin in because it would cause even more stress localization in that area... unless you had someone heat treat/stress releive the whole diff afterwards.

edit: no reason to be so harsh

My reply was to Gro's comment/joke that it was as if Ford wanted parts to fail. The reason I'm so harsh is because I'm sick of seeing dealers treat people's cars like crap. A lot of people just drive their cars. They use them for transportation and just want a safe, dependable, ride. And these people are being taken. Just kind of gets my blood boiling.

[rurockn]

My reply was to Gro's comment/joke that it was as if Ford wanted parts to fail. The reason I'm so harsh is because I'm sick of seeing dealers treat people's cars like crap. A lot of people just drive their cars. They use them for transportation and just want a safe, dependable, ride. And these people are being taken. Just kind of gets my blood boiling.

Its not just the dealerships, also the mechanics. I have two friends that are both dealership mechanics, both are paid by the job and not by the hour... based on a point per job system. The more jobs, the more points, the more $$$. So basically what it comes down to is how fast you can repair something to get the most points possible. My one buddy always says he doesn't give two ****'s how good a job was done, as long as he can finish it as soon as possible to get his points. My other buddy goes through all the steps and claims he only uses impact tools for part removal and not installation, but sometimes has to work into luch a little or...etc. they both have told me that if for some reason I can't fix my car myself, to find a private mechanic thats paid by the hour because he'll use hand tools, torque bolts properly and take his time to get his $$.

Now, back to the tranny topic!!
A long time ago in this post, maybe page 5 or so, I posted a screen shot from one of my Ford Repair CD's of the M5 tranny with a small box of what vehicles it came in. I had posted that to clarify that the M5 is what we are talking about and NOT the mtx75. I don't understand how this keeps dragging on!

Something else thats simple to ask, has anyone looked into simply installing the Probe SE's final drive? Just curious since I have always looked past this... its about 2.xx tenths more adequate for highway driving.

[rurockn]

just to throw my $.02, here is what I got directly from Ford:

Car...................1st.....2nd...3rd....4th.... 5th....Rev....FinDr.
2.5 2G Probe (M) 3.307 1.833 1.310 1.030 0.795 3.166 4.388
2.0 2G Probe (M) 3.307 1.833 1.233 0.914 0.717 3.166 4.105
91-94 Capri XR2 **Not available online...could get the book**
91-96 Escort GT, 3.307 1.833 1.310 1.030 0.795 3.166 4.105
91-96 Tracer
97+ Escort ZX2 . 3.307 1.833 1.310 1.030 0.795 3.166 4.105

Hate to double post, but I just noticed something... These numbers are different from what are on my Ford Repair CD's... I'm at work so I can't look. But last night I was looking through them and noticed the 2nd Gen 2.0 Probes final drive was 3.8xx and GT's was 4.1xx

[turbo_KL]

K8,KF and KL egine powered cars use the G25M-R tranny. The F25M-R can for example be found in the 1.6 liter 4 cylinder powered MX-3

yeah I've found codes like G25M, G5MR, G25M-5, G15M-R, and F-25MR. I know that G25M means (g-series of M5), and I believe we have the f-series, correct? that would make us F25M or F25M-R?

[KaedenKy]

Since this thread is getting alot more traffic than others, can someone tell me where to source the following parts?

Shift Forks

Actual Gears

They are considered obsolete from ford if i ask them to look up the probe, so part numbers for other cars would be awesome.

[95PGTTech]

K8,KF and KL egine powered cars use the G25M-R tranny. The F25M-R can for example be found in the 1.6 liter 4 cylinder powered MX-3

so we can use anything from another G25M-R transmission, or anything but the diff. from a F25M-R, correct?

[snailman153624]

K8,KF and KL egine powered cars use the G25M-R tranny. The F25M-R can for example be found in the 1.6 liter 4 cylinder powered MX-3

The 2.0L FS engines use the G25M also, just different bell housing adapters.

[turbo_KL]

Tranny parts can be sourced at the Mazda dealer.

[Kooldino]

Wonder if this info would benefit 3rd gen Protege guys (G15M-R).

[comish71]

[QUOTE=95PGTTech]we've pretty much established that our M5 transmission is basically a re-worked MTX-75 with a different case. gears 1-5, R are interchangeable because they are equal dimensions and cut (helical), but the final drive (differential) won't fit into the case without severe grinding.

so then you we can exchange the gears directly from an mtx-75 tranny into our g series tranny?

[rurockn]

we've pretty much established that our M5 transmission is basically a re-worked MTX-75 with a different case.

I had thought this was the other way around. I recall that the MTX75 wasn't introduced until a few years after the M5? Hmmm....