Mine started the 5th gear grind regularly about a week ago. 17000 miles, driven like an Evo, but nothing too crazy. Transmission has been notchy since day one.

 

so who would you guys recommend for a rebuild if the car is outa warranty?

 

Hmmm...I used to get 3rd to 4th shift gear grind on my old WRX and changed my fluids with a mixture of tranny fluids. It stopped the grinding completely and never had any issues with it since. Anyone ever try this mixture? Its well known in the Subaru community as Uncle Scotty's Cocktail.

1qt redline lightweight shockproof
1qt synchromesh
2qt Castrol HypoyC 80w-90

 

Using a better tranny fluid such as:

BG Synchroshift II
BG Synchroshift
GM/Penzoil Synchromesh

will make these grinds go away. The OEM fluid is too thick and does not provide good lubrication.

 

Ok, seriously stop with the spreading of misinformation!

True, the stock fluid is "thick." But how many materials science and chemical composition classes at major universities have you taken? Thickness in no way is directly correlated to lubrication abilities, period. Motor oil is pretty "thin" compared to the stock fluid, does that make it better?

Second, yes syncromesh will make some gear grinds disappear. But as someone pointed out earlier in this thread, all that is doing is masking a more serious problem.

Yes people have used syncromesh successfully. People have also had issues. People have supposedly had issues with the OEM fluid as well. I havent had a single problem with the OEM stuff, and neither has the people I talk to on a regular basis. This on top of the fact a dealer could easily give you a hard time for having syncromesh in your transmission since it DOES NOT fall into the viscosity rating for the transmission.

 

Bulletproof tranny, I owned one, and I owned a regular WRX, and my Evo's tranny is starting to remind me of that one, just "Fragile".

 

I beat the living crap out of my tranny on my 05 Evo for 39k miles and NEVER had any grinding or lock outs.. The only fluid i used was Penzoil syncromesh. The only bad thing i had was very weird vibrations in the shifter when i tried to downshift, never experienced this in any other car i owned

 

Unforuntately what works for one car doesn't work for the other. It seems like it's a safe bet that bg sychroshift is the thing to use in your evo if your having grinding problems.

 

As many have stated ------"GO To Another Dealership" Why do people think they have to take thier car back where they bought it? If you are having a problem with a single dealership try another one. They Are Gonna Get paid to Fix a warranty issue..no matter where you take it..

 

My 05 has a notchy 3rd, but I will be replacing my motormounts, tranny mounts and shifter bushings this spring, hopefully this will some some of the notchiness.

 

Because after the first repair attempt the REGIONAL service manager denies the job, and no matter what dealership in that area you take your car into the car will be denied for that claim.

 

Ok Tristar, this is not "misinformation", you have no idea what the hell you are talking about whatsoever. Have you ever dis-assembled an Evo tranny? No, you probably haven't. How about a DSM tranny? Mostly likely not. The Evo and DSM transmissions have ALOT in common in design and materials, and guess what the DSM's (and many other foreign + domestic cars) have successfully used aftermarket transmission fluids for over a decade. Not only do people run oil of different viscosities in their transmissions (with huge success) but ALSO in their engines. You don't have to run 10w30 mobil-1 in the 4G63. In fact, I willing to bet there are better oils and viscosities out there for racing applications. You are the one spreading misinformation. Granted, if you like your warranty, you shouldn't mod your car or use aftermarket fluids. However, OEM is definitely NOT always the best. Otherwise, why don't you just leave your car stock?

 

Look the tranny has to be warm 1st(entirely warm) The guy lives in colorado. I dirve mine in negative degree weather and will always have a problem getting into gear or will grind before it warms up. Look at the shifter bushing kit from buschur. After I installed these it always went into gear no matter the temp.

 

Wow, get all that anger out? Ok, good.

First off, yes on having both transmissions apart, thanks for asking. I also agree with your common component comment, but I do believe the syncros are different.

Now, back to my point. First off, my comment about motor oil has nothing to do with what weight to run in your car, genious. I was merely stating that its thiner than the OEM transmission fluid, which by your original statement would mean it lubricates better. I also agree there are better oils to run in the 4G63, but that has NOTHING to do with this thread.

You didnt answer my question about classes dealing with chemical properties. Again my main issue was you said the OEM fluid is "too thick and doest provide enough lubrication." My point was thickness does not have a direct correlation with lubrication characteristics. Gear lubrication is much more complex than the thickness of the lube, but Id guess you dont understand that.

Your comment about OEM not being best is laughable. Some aftermarket companies offer a good product, but many times the parts we add to our cars have not gone through durability testing. Other times we remove components that were proven to be necessary during engineering and r&d, and then wonder why something broke. OEM is not always best, but most of the time it is in terms of durability and longevity. (point out the stock clutch, go ahead, its a wear item that Mitsu designed to be the weak link in the drive train so knuckle heads that drop their clutch at 7000 rpms destroy a clutch, not a more expensive transmission. Think of it as a fuse)

Refering to OEM fluids as being inferior is even funnier. Yea, you know, Mitsu chose crap fluid for their transmissions just so more problems would surface. Give me a break. They chose a cost efffective lube that provided adequate cooling, lubrication, and shock characteristics. Go read the original Mtsu TSB regarding SyncroMESH in DSM vehicles. Notchy gearbox feel is the complaint that it solves, nothing else.

You completely failed to realize why I said you were spreading mis-information. BY the way, nothing I have said is misinformation. I stated people have had problems with Syncromesh and OEM, and that I and others I have direct contact with have never had an issue. I also drew upon my knowledge of gear lubricants from college and working at an engineering firm. But hey, you just keep spouting off about how the OEM fluid doesnt lubricate well.

 

i dont have problems with any of my gears, but my friends grind every now and then, and its usually kuz they try to shift to fast and let the clutch out to quickly, maybe its just ur shifting???