Trouble with Toyata MMT gear box

JT86

Does any body know where I can get MMT gear repaired without going to Toyota dealer as it would cost an arm and a leg. The car has only 70k km. It over revving going from 3rd to 4th. Many thanks,

biko

Get a quote from the dealer. That way you will have something to compare other to.

Which county are you in?

colm_mcm

you may just need to get it recalibrated. main dealer job. takes 20 mins.

JT86

biko wrote: »

Get a quote from the dealer. That way you will have something to compare other to.

Which county are you in?

I am based in Dublin.

Bigus

Is it the clutch slipping ? Clutches wear in these things just like a manual if not more so.

JT86

Took the car to a Toyota dealer. It came out 2750 to replace a clutch and an ecu. Is there anywhere else in Dublin area where I can fix it cheaper? Thank you again.

Atlantic Dawn

Perhaps try a 2nd dealer for another opinion given the amount of money. Also if the car is drivable you could see what pricing is in a Toyota main dealer in Northern Ireland for the same job.

Ron Burgundy II

Be very careful who you let work on the car. My parents had a 2005 Yaris with the MMT gearbox and it went to nearly every main dealer in cork and no one could get it working..

First thing first the ECU needs to be initialized before works begin on the MMT gearbox. Basically what this means is that the ECU is told that works to the MMT gearbox is about to begin (in simple terms). If this isn’t carried than the ECU won’t recognize any new gear box and you’re back to square one.

I would get the ECU reconditioned, I sent the parents ECU to a company in the UK who specialize in this work and they cleaned it all up at a fraction of the costs of buying a new one.

However as the first part was skipped by an indie so Toyota wouldn’t stand over the recon ECU so my parents forked out for a new ECU at the request of a the Toyota main dealer. In the end the damage was done and the costs spent on the car far out weighted what it was worth. So it went to the scrap yard, I would say nearly 4/5 years ago.

Anyway what I’m saying is don’t send this to an indie no matter how good they are. They won’t have the tools/software and knowledge that a main dealer will be able to get hold off. And the worst part of it is that even the Main Dealer may f**ck it up. No guarantee that even if they do resolve the issues it won’t rear it’s ugly head in 6 + months down the road.

Also people in the UK are struggling to get issues with the MMT resolved by Toyota main dealers.

Bigus

Try red cow gearbox , autotranz walkinstown, bohernabreena gerabox , universal gearbox rathfarnham.

It's just a bloody automated manual, so a box of tricks operates the levers and the clutch fork, so changing the clutch is the same as a manual except they have to go through a special selection process to tell the ecu the clutch is being changed.

I still say a slipping worn dry clutch plate, just like a manual.

But

Let the 4 of them give a diagnosis first.

Bigus

Ron Burgundy II wrote: »

Be very careful who you let work on the car. My parents had a 2005 Yaris with the MMT gearbox and it went to nearly every main dealer in cork and no one could get it working..

First thing first the ECU needs to be initialized before works begin on the MMT gearbox. Basically what this means is that the ECU is told that works to the MMT gearbox is about to begin (in simple terms). If this isn’t carried than the ECU won’t recognize any new gear box and you’re back to square one.

I would get the ECU reconditioned, I sent the parents ECU to a company in the UK who specialize in this work and they cleaned it all up at a fraction of the costs of buying a new one.

However as the first part was skipped by an indie so Toyota wouldn’t stand over the recon ECU so my parents forked out for a new ECU at the request of a the Toyota main dealer. In the end the damage was done and the costs spent on the car far out weighted what it was worth. So it went to the scrap yard, I would say nearly 4/5 years ago.

Anyway what I’m saying is don’t send this to an indie no matter how good they are. They won’t have the tools/software and knowledge that a main dealer will be able to get hold off. And the worst part of it is that even the Main Dealer may f**ck it up. No guarantee that even if they do resolve the issues it won’t rear it’s ugly head in 6 + months down the road.

Also people in the UK are struggling to get issues with the MMT resolved by Toyota main dealers.

Agreed to a degree , but indies have this Sussed after 4/5 years as always

colm_mcm

Thankfully nobody in Ireland really bought MMT gearboxes, I can't see indies in Ireland being that well up on them as a result. Maybe a gearbox specialist, but even at that I can't see anyone enthusiastically taking one on, they're junk.

MMT is out a long time (over 10 years) and hasn't been improved much in that time.
the new ones are still dreadful despite 2 name changes (M-M and multimode)

Ron Burgundy II

I agree its just an automated manual. But for some reason something makes these transmissions just go south.

Our MMT was transported up to an Automatic Gearbox specialist. Still couldn’t get it right.

If you do a quick google search on MMT issues you can go through pages and pages of issues and proposed solutions from Toyota dealers that within short periods of time fail again.

I don’t want to scaremonger but be really careful who you let at the car. I’m just speaking from experience.

Special Circumstances

Btw colm_mcm. .. Thanks for the info you gave me on these when I asked back along... a torque converter kia was bought instead!

Bigus

The VAG version in UP! Mii Citigo is fantastic , especially with latest software updates, blips nicely on down change , even if you're aggressive , and you can inch smoothly right up to an obstacle within mms without jerking unlike the Toyota / Opel versions.
Really is a revelation on previous versions that I'd say improvements are mainly down to ECU brain power/ fussy learning ability.

Ron Burgundy II

I have no experience of the Up! set up but I’m slightly dubious of these types of transmissions.

OP I really do hope you find someone with experience and you come out the right end of a fix. Yaris is a lovely car but this transmission really lets it down.