Yes, you can put a 5 spd transmission into an MR and I would suggest doing so if it's going to be used for road coursing.

 

Read my posts above, then read the thread linked above. There is tons of info right here at your fingertips that would have answered this question before you even typed it...all you have to do is read what's right in front of you.

TurboIX, that was a very poor reaction. I get the feeling you don't have a clue what we're talking about by the fact you said you enjoy using 4th and 5th on the highway. You gotta be kidding me...

I said my 6spd held up to 250+ drag runs and over 100 autocross runs with no problem whatsoever. It wasn't until my 7th day of road racing at very high speeds and with very aggressive driving that I lost 4th gear.

Sonic, I haven't seen where the 6spd can't handle the torque. Its 1-3 gears are beefier and stronger than the 5spd, so the 6spd can handle torque quite well. There isn't a whole lot of torque to worry about in gears 4-6...not like the shock of gears 1-3. I certainly didn't overpower my 4th gear with my mid-300s whp and wtq...

 

How do you plan to convert to a 5spd?

I was with a fellow MR owner at RA and he lost 4th gear trying to follow me... again another Redline user.

I've been using Diaqueen and have 5 track days under my belt, with (knocks on wood), no problems yet.

 

When I said torque, I'm not talking about the measly 320 whp you (or me) are putting down. You won't see any 6 speeds holding 600-900 HP like the 5 speeds. This is why shep doesn't favor them. The 6 speeds are structurally weaker than the 5 speeds.

 

Actually your statement is a little bit arguable. The G50 was specifically created for the 3.2l Carrera in 87 and at that time the Carreras were rated at 231hp(crank),the G50 was then passed on into the 911(964) Porsche and they made a few variations of the G50.

Later on they worked the G50/50 and finally they came out with their latest G50/52 on the Porsche turbo911 (965, 3.3l). The last G50 modification for the US market was a clone of the European G50 by changing 2nd through 6 gear, this was calle the G50/21. Primarily this change was done because the acceleration from a roll from the Euro specs Porsche 993 compared to the US version was far superior.

I happend to had a Porsche 911 Carrera4 6 years ago with a G50 tranny. Based on the porsche aplications and their hp outputs I would definately say that the Mitsubishi engineers did a decent job on the Evo trannys. Also, the Mitsubishi Gerabox are far more compact than the hugemongous Posche straigh gearbox.... got that?


Carlos

 

^damn Carlos u seem to know a lot about a lot of cars haha

if only the Mitsu 6spd can be like the Supra's...damn that'd be awesome. getrag ftw.

 

Fireball, were you asking me? I actually already made the switch. Shep took the 5spd from his personal Evo and built it up for me, then switched 5th gear with one from a IX 5spd to give better gearing for road racing, although my highway cruising rpm will suffer.

Shep rounded up all the parts for me, which included the trans brackets, shifter cables, shift box, shifter, and speed/reverse sensor harness. So far, that's all I think is needed, but I'm still keeping an eye on things to see if there's anything else needed. We didn't know about the speed/reverse sensor until the re-install when my 6spd cable/plug would not fit in the 5spd receptacle.

 

how come? supras are 6 speed and tons of them surpass that barrier

 

We are not talking about a supra 6 speed. Not only is that an entirely different car, but it is also rear wheel drive. I'm not saying 6 speeds in general are bad. Take a look and see if you can find any high horsepower 6 speed evos. You won't find many because the transmissions will always break.

 

I think he means EVO 5 & 6 speeds.

 

or you could trade in your cars for a IX GSR SE.

 

^Definitely the best of both worlds there.

I think people get a little too jumpy when these posts are made (and unfortunaley there's a frigging 5 vs 6 speed thread every few weeks). I just don't understand why someone would swap out a 6 for a 5 if the damn 6 isn't even broken (yet). At least wait for the tranny to shi* the bed first . If all you're going to do is drop it into 4th and wind it out on the interstate (zzzzzzzzz) then you're worrying over nothing and your day shouldn't be ruined...

 

True..if you have an MR already, there is no reason to do anyhting UNTIL IT BREAKS

However, there are things you can do as preventative maintanance, the biggest problem is HEAT, which is why you see failures at the race track, and not on auto-x cars or drag cars

A big ol tranny cooler with extra fluid capacity is one of them

 

The reason I asked about experience with TRE modified 6 speeds is that in my conversations with Jon (owner of TRE) he said that the modifications that he does to 4th gear he expected to substantially reduce the failures that have been mentioned. For road racing, he does recommend the installation of a transmission fluid cooler, but that is not unusual in a lot of well respected racing transmissions. Road racing is a different animal, that heats up and keeps the heat up for much longer time periods than almost any other kind of use. The heat is what is causing the failures, as far as I can tell. As Wartalon mentioned, the torque in 4-5-6 is substantially lower, due to the effects of the gearing ratios, so people are not tearing the teeth off due to sheer torque. As far as the lower gears go, I think that Jon mentioned that gears 1-3 in the 6 speed are actually larger and stronger than in the 5 speed...

 

If you plan on keeping your MR relatively stock in terms of power, and know how to hook up a tranny cooler, it would probably never break (unless of course you launched it repeatedly like some kind of retarded ape).