chadnick

It appears that the evo x 5 speed transmission is superior to the evo8/9 transmissions. Has anyone ever swapped the Evo X trans onto a 4G63? Does anyone offer a kit for this?

barneyb

It appears - what's different?

kaj

iTrader: (60)

The VIII/IX 5spd holds up to anything. Why would you need something better?

LetsGetThisDone

iTrader: (1)

The synchros are a more modern design in the X. That being said, the X trans won't bolt up to the 4g63. The X trans, tcase and 4b11 does fit in the CT9a. Mitsu ran it in WRC for testing back in the day.

kaj

iTrader: (60)

The whole thing? That would be interesting.

kikiturbo

not really... the only good thing about that engine is the double mivec.. the rest is a potential pile of problems and ecu is too complex for its own good..

Gearbox is not nicer to shift than the VIII/IX 5 spd.. and the ratios are nothing to write home about..
Also, X gearboxes had major central diff problems with pins wearing out prematurely..

kaj

iTrader: (60)

so chadnick is off their rocker?

kikiturbo

I am just glad no one suggested a SST swap into a VII/IX..

chadnick

Thanks for the info.


Here's one review of the X trans with some comparisons to the VIII/IX trans: http://www.jackstransmissions.com/pages/evox-review

LetsGetThisDone

iTrader: (1)

Better cylinder head (once ported), double mivec, 4 bolt mains, lighter weight.

X gearboxes are definitely of a better design than the CT9a. They also no longer have the center diff pin issue. That was 08's and 2010's...

kikiturbo

if we are doing a list, lets not forget weak block, short rods, exhaust manifolds that crack every 30K miles and weak valves that need upgrading when going for better cams.. ...

contemplating a full engine swap because the gearbox has better 4th synchro and some linear bearings on shift rods is a bit much IMHO.. Still needs better gearing tho..

RazorLab

iTrader: (8)

Uhm... what?

Obviously a statement from somebody that doesn't actually tune them. If you think the ecu is too complex, A). I'm sorry it feels so complex to you. B.) Don't try tuning a modern MED ECU, they make it feel like the Mitsubishi ECU is a abacus.

kikiturbo

I actually do tune them from time to time and I agree with you.. I wasnt very clear.. my point was that it is very complex from a stanpoint of someone doing a complete engine swap.. after all, would you go to all that trouble just because of few minor improvements in the gearbox (and a whole lot of new problems with the X engine)

LetsGetThisDone

iTrader: (1)

I wouldn't do a X swap and keep the OEM ECU, I also just wouldn't do it. Both engines have their own issues. And it would be a lot of work for close to the same result. I simply said the X trans wont bolt up to 4g63, but the whole X engine/trans/tcase will fit in the CT9a. I wasn't saying to actually do the swap lol

94AWDcoupe

iTrader: (125)

the X trans isnt worth the headache of any kinda swap work. the changes made to trans are nice tweaks. some of them can be added to the 8/9 trans during a rebuild. my opinion is the evo 8/9 trans is nothing short of amazing when it is paired with a nice clutch. the devil in the details is a good clutch makes any trans shift well. a lightweight disc is FAR more important to any mod you can do to the trans in an effort to make it shift good.