I posted this in another thread, but it was an old thread and nobody saw it. Maybe this is more common than I am aware of, but this is pretty interesting to me...
The 2008 Lancer Evolution GSR debuts a new 5-speed manual transmission (W5M6A) that provides a higher torque capacity than the 5-speed manual transmission used in the previous-generation Evolution models. The new transmission is also six millimeters shorter than the previous 5-speed and the same as the 6-speed used before.
Enabling higher torque capacity requires greater gear face width, which would then result in to a longer transmission case. To make the room needed without lengthening the case, the W5M6A manual deletes a dedicated Reverse gear. Instead, Reverse is provided by meshing 1st and 3rd gears, with synchromesh used to a synchronize the idler gears that mesh them.

Im sure it is interesting but not having a clue what goes on under a cars skin all I can ask is, does that make a difference to me as a driver? :confused:

Im sure it is interesting but not having a clue what goes on under a cars skin all I can ask is, does that make a difference to me as a driver? :confused:

In simple words, it means that the new 5 speed manual trans can handle more power/torque than than the previous 6 speed trans.

Wha?

what does that deleting the reverse gear, and putting 'mesh' on 1st and 3rd gear?

doesn't that makes the gear for 1 and 3 (which is used for reverse too) tend to wear easily?

In simple words, it means that the new 5 speed manual trans can handle more power/torque than than the previous 6 speed trans.

Unfortunately it has been reported in articles the 5 speed box is still notchy and not as fluid as it could have been .

Cheers
Michael

The main part that I wanted to emphasize in the article was the bold section. Yes the new tranny is more durable than before, which is nice, but the deletion of reverse to save weight and having 1st and 3rd mesh to create reverse sounds cool, but how exactly does that work? And no, I don't think that it puts any extra wear on the gears, as they're just being used the same as they would during normal driving. I guess you could say that in a car with a conventional reverse gear, if you never had to back up and always started in first rather than reverse, are you putting any extra wear on 1st? Not really, as long as you don't plan on launching the car in reverse I think your fine. That sounds kinda interesting, actually...launching a car in reverse. Your face would probably hit the steering wheel and deploy the airbag. You'd have a hard time explaining how you got your injuries to your doctor without looking like a complete moron! lol

so reverse has synchros on the evo x???

Unfortunately it has been reported in articles the 5 speed box is still notchy and not as fluid as it could have been .

Yes it is a little notchy in 2nd & 3rd for me. It is getting better though, hopefully it'll be smoother soon.

Yes it is a little notchy in 2nd & 3rd for me. It is getting better though, hopefully it'll be smoother soon.

Have you tried a different type of oil in the Gearbox , Motul ,Royal purple etc ?

My gearbox in the RX8 is smooth as :bowlol:

Cheers
Michael

I dont think its the oil, I think it might just need to be worn in??

Ive clocked up 5000kms now and the original notchyness has gone away.

I dont think its the oil, I think it might just need to be worn in??

Ive clocked up 5000kms now and the original notchyness has gone away.

Good to hear its getting worn in , i changed my gear oil at 5000km and was suprised at the amount of metal shavings in the oil :(


Cheers
Michael

That doesn't sound good. Is that typical of all evo's gearboxes when new?

What type of gear oil did you use?

I posted this in another thread, but it was an old thread and nobody saw it. Maybe this is more common than I am aware of, but this is pretty interesting to me...
The 2008 Lancer Evolution GSR debuts a new 5-speed manual transmission (W5M6A) that provides a higher torque capacity than the 5-speed manual transmission used in the previous-generation Evolution models. The new transmission is also six millimeters shorter than the previous 5-speed and the same as the 6-speed used before.
Enabling higher torque capacity requires greater gear face width, which would then result in to a longer transmission case. To make the room needed without lengthening the case, the W5M6A manual deletes a dedicated Reverse gear. Instead, Reverse is provided by meshing 1st and 3rd gears, with synchromesh used to a synchronize the idler gears that mesh them.


You're about 2 months late and in the wrong section. lol.

http://www.evoxforums.com/forums/showthread.php?t=1048

That doesn't sound good. Is that typical of all evo's gearboxes when new?

What type of gear oil did you use?

I heard previous evo, namely 8/9, had such a problem as well.

In simple words, it means that the new 5 speed manual trans can handle more power/torque than than the previous 6 speed trans.

Or the previous 5 speed for that matter.

My recommendation is to not change the tranny fluid inthe evo. If it's anything like the sti, then the tranny fluid is specially matched to the synchros in the tranny. Go with a more slippery fluid, which is better for the gears and the synchros won't lik it. Go with a higher friction level fluid and the synchros will love it but the gears won't. Tranny fluid isn't subjected to anywhere near the heat that he motor is, and there's no consumption like there can be in a motor, so my recommendation is to leave it alone. Defintely change the motor oil to low friction, high performance, though.

All Mitsubishi trannies over the years have shifted notchy at first and broken in nicely over the first 5K miles. It is the guys that mash the gears regardless from the start that never get them broken in.

All the Mitsu trannes I have seen after 1990 have syncros on reverse. Even still it dont mean you can stick it in reverse on the freeway with out some grinding :-P

Mike W

My VIII was pretty tough to shift at first, and then I had the dreaded issue with the Synchros going out on all the up gears (1, 3, 5). Fortunately, the dealer covered the rebuild of everything. I also learned that the Evo definitely does not like aftermarket tranny fluids. I tried GM Syncro Mesh, Motul, Redline, and some other brand, and had issues with all of them. The only stuff that seems to work, and allows me to shift with no issues is the Mitsubishi fluids.

^see, exactly the same issue I had on my sti when I tried different fluids. It would never grind, but it would make a weird noise and the shifter would have a crunchy feeling in it. Hard to describe... stick with the stock tranny fluid, the synchros are designed to work with it and no other, it seems.

well thank you very much for this, im learning alot before i get my evo.:thumbup:

That sounds kinda interesting, actually...launching a car in reverse. Your face would probably hit the steering wheel and deploy the airbag. You'd have a hard time explaining how you got your injuries to your doctor without looking like a complete moron! lol


THAT made my whole day better haha :+1::+1::+1:

Ahh, interesting, so people have seen the notichiness go away after time? I've only got 650 miles on her right now, so I'll take it very easy on the trans until it goes away.

Bit like a new woman!

i just baught my evo x gsr about 3 weeks ago, just broke 1100 miles and now my gearbox is smoothing out alot. i was getting almost a bit worried in the start because it was notchy

Mine is still pretty notchy at ~1600 miles. It's a little better, but mostly I'm just getting better at dealing with it during shifts. It's certainly better when not cold.

Ive done nearly 4000miles and its still pretty notchy in 1, 2, 3, worse when cold but always noticeable :(

Ive done nearly 4000miles and its still pretty notchy in 1, 2, 3, worse when cold but always noticeable :(

The car I traded to get the Evo was a '08 Acura CSX type S (Basically Civic SI in US) and the gears were notchy and by about 3000 kms they really smoothed out. by 5000 didn't matter if cold or hot, pure smoothness! My Evo X only has 400 kms on it and it is notchy when cold and a little better when warm. I was told by somebody I really trust in the business to shift very slowly and avoid "pulling through" the notches, he said slide through them lightly (find the shift path). He said by doing this = butter smooth by 3000 kms.

This sound accurate to you guys/girls?

Mine has 500mi on it. My tranny is notchy when cold but, once it warms up shifts great!

mine got better with shift bushings ... and holy old thread.

17,250 miles on mine, still notchy.