End of the dream evo x sst transmission issues - Mitsubishi Lancer Register Forum
 
 

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Old 17-09-2019, 07:12   #1
remlin
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End of the dream evo x sst transmission issues

Hey guys / girls

Had my dream car for around year now.

The dream started when watching Jackie Chan in thunderbolt. Never look st another brand since.

Looks like I hit some issues with the sst transmission which has left me completely depressed.

Everything was going alright changed gearbox oil and filter early this year which gave the box a new lease of life.

Picked up a puncture at the front, and tried to drive on a flat for about a mile looking for a safe place to pull over. The car kept engaging and disengaging the clutch which I just assumed was due to flat tyre and driving very slow.

Since the puncture the car hasn't been the same. Downshifts are very very harsh. Actually more like shock with gears banging into gear. At times it feels like the gear box is about to drop out.

The harsh downshifts are normally felt when going down from 3 > 2.

Also when coming to a full stop it seems like the clutch is still engaged at around 500rpms which gives the feeling the car is about to stall.

Check for codes and nothing popping up.

I have tried a teach-in although the car always fails at clutch ventilation. Not sure if this is due to too much oil in gearbox?

Aside from failing clutch ventilation, the rest of the procedure seems to go through nicely. Teach-in helped initial (downshift not so harsh) although the car reverted back to harsh down shifts after a day.

The shifting get worse once the box has warmed up. Driving the car without properly warming and everything seems OK?

Right off bat first thing to mind is get the box rebuilt with new clutches. Second thing comes to mind and that is cool um where you getting the cash flow from?

I'm in a bit of a ditch....

Trans problem is very strange no codes but harsh shift issue.

Thinking of getting in touch with Auto torque for a quick check. Based on what I've come across so far the fear is starting to set in...

Anyone else experienced very hard shock like downshifts?

No issues going up just down.

I really don't want to move on to a BMW or audi.
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Old 17-09-2019, 07:25   #2
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I'm no gearbox expert, but does sound like the gearbox / clutch needs rebuilding / replacing, get in touch with one of the dealers on here, you'd be surprised, the good dealers wont rip you off.

Is the X your daily? if it is get yourself a cheap daily and dont stress on getting the X fixed. You wont regret keeping it. Just one of those things, evo's are great, but they do break from time to time
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Old 17-09-2019, 08:01   #3
plip1953
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Clearly there's something not at all right with you box and quite frankly the only way forward is either to put in a new one (expensive!) or get your car to a specialist to take apart (quite expensive too!). The longer you leave things the greater the amount of damage that will be caused.
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Last edited by plip1953; 18-09-2019 at 10:06..
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Old 17-09-2019, 14:30   #4
Sephiro
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In terms of overfilling the transmission with oil there is a fill level inspection plug on the side of the transmission behind the passenger wheel. If you therefore put the car on a level surface, then remove the plug any excess oil will drain out.

It's also worth noting that weird SST issues can be caused by other faults other than the gearbox. Davie had problems with the throttle body on his X and it caused poor/abrupt SST clutch engagement and resulted in various teach in steps failing, including the clutch ventilation and boost steps. Once that was sorted the SST and reteach was fine.

What are you using to read the codes as most software tends to only read the main ECU and not the codes from the other ECUs such as the SST specific codes from the TCU?
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Old 17-09-2019, 14:41   #5
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if the clutch pack overheated the steel plates can get bent and then you have similar issues... I am affraid it is time to see a SST specialist..
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Old 17-09-2019, 16:29   #6
remlin
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Hey guys,

Thanks for the replies,

@ Shauno honestly mate I really don't want to get rid. I was tempted to the dark side aka wrx sti I just don't think it is as good handling wise

@ Plip1953 I am seriously considering taking the car to auto torque closest to me, I'm in London haven't seen anyone closer. My main concern is causing more damage equaling to increased repair bill.

@Sephiro I'm using a tactrix cable with Evoscan and Passthrucan to read codes. Thanks for the oil tip, Honestly my hunch is too much oil causing clutch ventilation step to fail. I would really like to Know what the clutch ventilation step is.

The strange thing why only on downshift and not up.

I'll try and get the car booked in if Auto torque are not too busy. If they are booked up, I'll check around for another specialist
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Old 17-09-2019, 18:35   #7
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I’m also intrigued by the point about seemingly it's only downshifts that affected. I’m no expert, but could thus indicate that a magnetic sensor on one if the selector rods has fallen off, thus confusing the tcu into not knowing quite where is in terms of a shift demand?
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Last edited by plip1953; 18-09-2019 at 10:07..
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Old 18-09-2019, 06:05   #8
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Quote:
Originally Posted by plip1953 View Post
Iím also intrigued by the point about it seemingly downshift only grate affected. Iím no expert, but could thus indicate that magnetic sensor on one if the selector goths has fallen off, thus confusing the tcu into not knowing quite where is in terms of a shift demand?
that would throw a code and possibly turn off odd or even gears..
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Old 18-09-2019, 06:06   #9
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Quote:
Originally Posted by remlin View Post
Hey guys,

Thanks for the replies,

@ Shauno honestly mate I really don't want to get rid. I was tempted to the dark side aka wrx sti I just don't think it is as good handling wise

@ Plip1953 I am seriously considering taking the car to auto torque closest to me, I'm in London haven't seen anyone closer. My main concern is causing more damage equaling to increased repair bill.

@Sephiro I'm using a tactrix cable with Evoscan and Passthrucan to read codes. Thanks for the oil tip, Honestly my hunch is too much oil causing clutch ventilation step to fail. I would really like to Know what the clutch ventilation step is.

The strange thing why only on downshift and not up.

I'll try and get the car booked in if Auto torque are not too busy. If they are booked up, I'll check around for another specialist
if you have the cable and evoscan you can try logging clutch slip and clutch pack pressure, which might give you an indication on the state of the clutches or of the clutch teach in has worked correctly
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Old 18-09-2019, 20:19   #10
remlin
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Hey Plip1953

I was thinking or hoping it could be just one of the plastic magnetic fork things but no codes what so ever. Did have a lancer ralliart with transmission problems with throw codes and only select odd gears.

What's weird is why is the transmission behaving it self when cold?

Kiki turbo I will logged clutches this weekend. Check to see if there is a any slip on either clutch pack

I have notice some slip in 5th gear both normal and sport mode but no slip in super sport.
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Old 18-09-2019, 21:17   #11
plip1953
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How many miles on the car? And where in the country are you?
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Old 18-09-2019, 22:10   #12
Sephiro
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If you did the teach-in without the oil up to the correct temp first then you will potentially get the behaviour you describe (i.e. drives better cold and gets harsh once up to temp) as the temperature compensation map will be wrong.

The other scenario could be causing that behaviour is seals going, however I'd expect that to manifest itself in all gears rather than just between 3rd and 2nd specifically.

If the clutches themselves were failing I'd expect to see slip in up shifts under high torque rather than harsh engagement in downshifts. Could be a sticky mechatronic solenoid?

What mode do you drive in, what mileage is on the box and how often has the oil and filter been changed?

Last edited by Sephiro; 18-09-2019 at 22:11..
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Old 18-09-2019, 22:14   #13
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I have seen a car that had too much clutch pressure on odd clutch pack at idle... i.e. it always had a clutch partially engaged and had very similar issues as the OP's car.
Check the clutch pressure on small throttle and idle and compare the odd and even clutch..
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Old 19-09-2019, 12:21   #14
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Out of curiosity kiki did you find out what the cause of the odd clutch pack high pressure was or did the box destroy itself first? I'm assuming it was a problem with the mechatronic unit (i.e. blocked oil release pathway or stuck solenoid).
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Old 19-09-2019, 13:03   #15
kikiturbo
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the box broke one clutch pack and snapped one plastic gear position magnet carrier for the reverse IIRC...
we changed the clutch and fixed that part only to find that the box would still engage the clutch all the time.. After doing the teach in it stopped and the box worked fine after that..
Please note that if the steel clutch plates warp from heat, the clutch will always drag, regardless of clutch pressure..
I think that one could also have an issue with control valves.. if they get dirty or similar..
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