while this post if focused on the tranny fluid, has anyone considered that perhaps it could be shifter linkage or something simple like that?

 

Not really, because downshifts are fine....only upshifts affected on my vehicle.

 

Part of the scoop here.... My Driveline Mgr from AMSOIL has worked all day on this and was on the website here on EVOm... so in case he sees this, I want to Thank Him for taking all day to research this and come up with his recommendations !!

The Mits tranny fluid is equivalent to AMSOIL MTF which is rated a 5W-30 by Motor Oil standards... No problem there...

Here is where the technical stuff comes in.. The stock fluid, our MTF, Redline MT-90 and any of the other fluids rated a 80 wgt (5-30 or 10-30) are NOT Recommended for Engine outputs over 250 Lb Ft of Torque...

Recommendations are forthcoming, I need 1 more piece of info to give these...

Doc

Here

 

Well, I spoke with the service manager at the dealership where I purchased my X, and she is one of the nicest people that I have ever talked to at any dealerhship. She told me that she has received a couple complaints and was aware of the TSB that was put out saying that if a customer complains about rough shifting to wait until mitsu tech releases a fix. She did however say that she is aware of the reflash TSB and that my VIN falls within the range of affected vehicles. So while they can only document my tranny issue (even though I've complained over the phone before and even have a case number with mitsu corporate), at least I will get one of the two main issues with the car taken care of. After that, the tranny issue will be the only problem with the car.

 

WTF mitsu?

 

Looks like this will be an improper recommendation IF the car is tracked or develops more than 250 Lb Ft of Torque.

I need someone that knows these trannies Intimately to answer a question. Does this tranny utilize a Limited Slip setup internally ?

I have answers for proper fluid recommendations but need that info.


Doc

 

Here it is... I will be making a seperate page on my website for this, but it probably won't be until next week sometime.

IF the car is a Daily Driver maybe with only some very occassional Spirited Driving, less than 250 Lb Ft of Torque, or Faster shifts are more important to you than the longevity of your transmission, AMSOIL MTF is the Replacement for the Mits Fluid. It is the same weight and carries a GL-3 and a GL-4 Rating.

Track Days, Plenty of Spirited Driving, Higher Torque/HP engine and you want your Tans to last, AMSOIL MTG is Still the Fluid and also meets the GL-3 and GL-4 Ratings..

DO NOT use Redline ShockProof in your transmission. It is a Petroleum based product and wax buildup occurrs.

I have seen some write-ups before and now again with researching this that state to stay away from a GL-5 Lubricant because it is "Too Slippery" for the Synchro's...... Wrong answer.. it is because most have a high level of Phosphorous, which as I said, will attack the Brass/Bronze/Copper parts.

I would say that 99.9% of the EVO owners I have sold Product to, Require the MTG in their trannies.

Doc

 

Doc, what do you think of this?: I spoke with the service manager at my mitsu dealer and she said that if you change tranny fluid in the evo you have to reset some computer parameter in the s-awc ecu or the tranny will burn up. I don't remember her exact terminology, but it was something along the lines of restoring a parameter of some sort, kinda like how when the timing chain's position is initially set in the ecu.

This sounds like BS to me, but plausible enough to still worry me. She also said that this applied to the EVO 9 and all before it, but those didn't have S-AWC and I can't imagine there being any kind of computer in any car that would have any effect on how the gears or synchros work in conjunction with a specific type of tranny fluid.

I know that there are computers for the ACD and AYC, etc, but why would these have any effect on how the system reacts to a different fluid? Anyone know what the hell she was talking about?

EDIT: I might have found the answer to this.I just called a different dealer and this is what he said: He told me that the transmission doesn't have a dipstick and that the only way to know when it's properly filled up is to plug the car into some kind of equipment that mitsu dealers have that shows electronically via a sensor how much fluid is in there. Without knowing how much fluid is in, fluid quantity is pure guestimation and could cause the tranny to burn up because of over or under filling. Now he said that this usually applies to the transfer case and not the transmission, but it could be on both. Anyone know?

 

Is there not a fill plug to check fluid level ?? Also, if you look up a few threads, the service manual gives you how much fluid to install. Could she have been talking about an auto in a Lancer or something ?

I'm with you for this sounding like BS... Makes you seriously wonder when you are getting different answers from a Dealer....

Doc

 

Yeah, its a crock. Drain 2.6 quarts, add that same/correct amount, start, and go.

 

that bs the 75-90 works better and offers more protection. You also recommended light shock proof which is a no no in the tranny.

 

I think you need to read again

 

I don't know what you're talking about, but I most certainly did not recommend redline shock proof. I didn't recommend anything for that matter. The original link was my guess as to which redline oils mitsu was experimenting with (if the rumor of them experimenting with redline fluids was even true). The oil that that guy was wondering if he should use was a gl-5 75w90 and I said NOT to use that.

GL-5 oil contains phosphorou, which damages the bronze and brass found in most synchros. My comment was that if he was deadset on using redline that he should at least use the correct weight, which was the MTL. Please read people's posts more carefully next time.

 

This is where misconception comes into play.... You need to either look at the label or a Technical Data Sheet... There are GL-5 Fluids that meet GL-1 through 5 Specs....

That is also what was screwing things up with this whole GL-3 thing in the EVO X 6 Spd... They dig up an old Spec and use it so you have to come back to them where there are fluids that meet that but don't list it...

Again, just like Hyundai calling for an SG oil.. 1994 Rating....

Doc

 

I think you need to read who I was quoting