Evo3 Transmission/ Shifting Question

[FoCoGSX]

Hello there!

So after spending some time trying to find an answer to this problem, it's time to post and see if anyone can help me out. I am having an issue with clutch release using an Evo3 tranny on a 2g GSX. The clutch will not disengage until the clutch pedal is almost to the floor. I have maybe 2 inches to work with. I have fixed/ replaced since purchasing the car:

-Rebuilt the tranny from Jack's Transmission down in Colorado Springs
-Replaced clutch master cylinder
-Bled lines

My question is, does the Evo3 tranny need its own special slave cylinder, or can the stock DSM one work? Does the pin in the slave cylinder need to be lengthened to increase the disengagement when depressing the clutch pedal?

I have tried to find as much information about the Evo3 tranny, but it seems to be a pretty obscure thing.

 

[SpeedMetal]

dont quote me on this,. but i believe the 2g and evo3 trans cases are the same. I have an evo1 trans and another 2g awd trans that appear to be the same. You could check the seal in your slave cyl. just to insure its it good shape/working order.

Then maybe just adjust the the clutch pedal throw..?.. thats what i do to pretty much dial in where i want my engagement to be (provided everything is good)

 

[tkrPerformance]

I am using a 2g gsx slave in the evo 3 the 2g and evo slave is the same thing,

a just the peddle. did you shim the pivot ball

 

[Afroclipse]

change fork and ball

 

[FoCoGSX]

Alrighty guys, thanks, ill look into shimming the pivot ball. And thanks for the verification that the slave is the same on both.

 

[SpeedMetal]

sure sounds like ALOT of trouble when you could try adjusting the pedal?

 

[Boostinsideways]

Just a stupid question here, but you are aware that the evo 3 has a different final drive, differential ring gear is different, and the output shaft pinion gear is different?

Trying to run that trans without making it compatible with the 2g dsm rear and transfer case is gonna cause a lot of problems, or have you allready done that? Or switched to an evo 3 diff and t-case?

 

[SpeedMetal]

Just a stupid question here, but you are aware that the evo 3 has a different final drive, differential ring gear is different, and the output shaft pinion gear is different?

Trying to run that trans without making it compatible with the 2g dsm rear and transfer case is gonna cause a lot of problems, or have you allready done that? Or switched to an evo 3 diff and t-case?

I ASSumed he allready knew this,.

 

[FoCoGSX]

Just a stupid question here, but you are aware that the evo 3 has a different final drive, differential ring gear is different, and the output shaft pinion gear is different?

Trying to run that trans without making it compatible with the 2g dsm rear and transfer case is gonna cause a lot of problems, or have you allready done that? Or switched to an evo 3 diff and t-case?

Yes, I found that nothing had been changed when tearing the car down. I have since changed the final drive gear to the correct late 2g one, along with the diff gear and pinion. I have spent the past 9 months or so just going through each system of the car and correcting all the mistakes I can find. That was the biggest one I have found so far. Its been a much larger task than I thought it was going to be, but hey, thats half the fun!

So slight update. I believe some of the problem may be due to some air still being in the lines from master to slave cylinder. I'm going to rig up a pressurized system to try and force fluid all the way through and see if that gets any more air out. If that doesn't help, I might just end up extending the rod on the slave a little bit.

I believe that my fork and ball is still in good shape, and that the pedal is adjusted correctly, but from other parts I have worked on and messed up on, I'll go back and double check everything just to make sure. This is the first tear down I have ever done so I'm learning as I go.

 

[805DSM]

By "adjusted the pedal" you mean the pedal height? Or the master cylinder rod?. To me it sounds like the clutch master cylinder isnt adjusted correctly .

 

[evileagleawd]

First watch jacks video and check the easy things first!
Jacks Transmissions LLC — Tech Articles

Second not sure how you are doing your bleeding process but this is how i do my cars. 1st need a friend he will pump the pedal and hold for you. 2nd get a clear bottle.3rd attach a vacume like to the bleeder screw on the slave cylinder.4th put some brake fluid in your clear bottle.5th submerge the vacume line in the fluid. 6th have your friend pump and hold.7th when open bleeder you will probably see bubbles. 7th close bleeder.8th repeat this process till no more bubbles are found. Very easy and you dont make a mess!

 

[FoCoGSX]

Vacuum bled the entire line, so I know for sure there is zero air. Still disengages only when the pedal in almost on the floor. I'm just going to replace the slave cylinder today and hope that is the culprit, as much as a long shot that is.

 

[FoCoGSX]

UPDATE

So after making and using a pressure bleeder, I can officially rule out any hydraulic issue. It still doesn't disengage until a few inches from the floor. I am now wondering if the ACT 2600 clutch is the issue. Would using this clutch with an Evo 3 tranny cause the disengagement issues? Is anyone running this transmission in their 2g GSX?

 

[gofer]

Did you listen to anyone that told you to adjust the clutch pedal? This is done AFTER you bleed the lines.

If you like reading tech articles ---> 4G63t.com: Clutch Pedal Adjustment

If you like watching videos --->

http://www.youtube.com/watch?v=vYJxQyjIhUw

 

[eli96talon]

I had the same problem with my car after installing the new clutch it ould only work after the pedal was all the way to the floor.well after 2 days of trying to figure it out I went under the dash and adjusted the clutch pedal rod and baam! The clutch was fine again.you should try it,it only takes a few minutes

 

[jrohner]

So did you actually put in a new slave cylinder or not? They're ALWAYS shot and cause the issue you're describing.

 

[FoCoGSX]

Yes, I have understood everything has been suggested, thank you. I have watched all the excellent videos from Jack's Transmission. I have replaced both the slave and master cylinder. The master cylinder in perfect adjustment: the internal valve closes after only one half inch of pedal travel. The slave cylinder begins to move immediately, but the clutch will not disengage properly. I also have installed an extended slave cylinder push rod, but that still only allows the clutch to disengage barely off the floor.

 

[gofer]

This is the last thing I could recommend reading, maybe there's something that Glenn wrote that will fix the problem. ---> Drivetrain: 2g Gain Clutch Travel, Fixing Wear, & Gaining Better Shifts

Did you replace your slave/master cylinders with Mitsu OEM units or the cheaper auto part store knock-offs?

 

[FoCoGSX]

Well I am sorry for not keeping up to date with this, but I have finally discovered the root problem. It seems the the "OEM" master and slave clutch cylinders were not OEM but generic knock offs. They were promptly removed and replaced with real OEM pieces. Disengagement increased by roughly three more inches off the floor, making it more than drivable.

Thank you all for the suggestions and help. You are all life savers!

 

[cherrymane]

Does anyone no if I can use a evo 3 transfer case in a 2g and if so what do I me to do for correct fitment

 

[talonsnwbrdr]

Thread is 2+ years old, try some more searching, and this thread:
http://www.dsmtuners.com/threads/wild-idea-complete-evo-3-drivetrain.364920/