MMT box fluid/oil change?

[sceh]

2004 Yaris petrol with the MMT box. Do I need to change whatever fluid is inside it or is it lubricated by the engine oil? Or is is sealed for 'life'

thanks for any hints

[Byzii]

Hey,

Manual gearboxes generally aren't as tricky as automatic gearboxes. It's recommended to change the transmission fluid every 100,000 km's. For the specific type of the fluid needed you can consult your user manual or somebody here will probably be able to chime in with the exact fluid needed.

And don't ever believe anyone who says that any fluid in a car is "for life". The only way a fluid in a car is for life is when you don't change it long enough and something breaks - leading for replacement and it truly being "for life".

[mrpj]

Similarly, a "sealed for life" bearing is, but only for the life of the bearing.😐

[sceh]

Since this is a manual box with an electronic control and clutch, the fluid will be normal gearbox oil without a filter - unlike a proper automatic with auto fluid and usually a built in filter inside the box.

Curiously I can find no information about the box or an exploded diagram. Toyota have probably removed all mention since the box is such an embarrassment...

[mrpj]

19 hours ago, sceh said:

the box is such an embarrassment..

You are not wrong there.🤐

[sceh]

The problem with the box is that it is most likely more expensive to produce, productize and service than a reliable proper automatic box and , wrorse, any problem is met with 'change the clutch mechanism' by Toyota dealers. No-one seems to know anything about it! This is usually more costly than the value of the car. I scrapped a perfectly nice Yaris with only 60k kms because of this and am about to do the same wit the current one after 55K

[Lam263829]

I was quoted 205 to change the mmt gearbox oil, after being turned down down by the maindealer and 2 other gearbox(auto) specialist, my car is 13 years old with 96000 miles,  is it worth the oil change now, does it make a difference,i might have to fork out 1400 pounds( quoted by the dealer) to replace everything anyways, and people are tellinv me different things, should i do it?