107 2Tronic box

[Geriatric]

I would be interested to hear from other 2 tronic owners regarding their experience on my problem.
Sometimes when manoeuvring into or out of a parking space the clutch does not engage at low revs and if I continue to accelerate the clutch comes in with a severe lurch. If aware of the revs rising I have to ease off and start again. Usually the steering is on full lock but it can happen in a straight line.
Our garage is diffcult to get into and the behaviour of the 2Tronic is a real pain.
For normal motoring it does not happen .
The problem seems to be on light on off acceleration where the clutch fails to engage at low revs.
I do not hurry when changing from forward to reverse and changing to manual mode for going forward does not help.
I would have thought the clutch engagement was based on revs so something seems to be amiss if the revs rise and the clutch does not engage.
Anybody else experience this ? Assistance appreciated.
I had a Toyota MMT box for 5 years. This has built in creep (easystart) and did not have this problem

[chopper1192]

Toyotas MMT transmission is mechanically a manual box, but mechanically manipulated and electronically controlled to work like an auto. It is not really a relevant comparison for the 107..

The 107 is a true auto job, with torque converter and clutch pack. Modern electronically governed true autos have little or no creep to prevent damage from people holding them stationary in D. When they work the switching is very sensitive and fine control is possible, so using the gas to park or pop her in the garage is an easy task.

The box ECU should sense the revs rising and engage the clutch pack, and off you go. There's either a software fault, or possibly an internal switching fault in the box. Alas, the former is a dealer job, and the latter is a dealer/auto tranny specialist job.

Good luck.

[Geriatric]

Originally Posted by chopper1192

Toyotas MMT transmission is mechanically a manual box, but mechanically manipulated and electronically controlled to work like an auto. It is not really a relevant comparison for the 107..

The 107 is a true auto job, with torque converter and clutch pack. Modern electronically governed true autos have little or no creep to prevent damage from people holding them stationary in D. When they work the switching is very sensitive and fine control is possible, so using the gas to park or pop her in the garage is an easy task.

The box ECU should sense the revs rising and engage the clutch pack, and off you go. There's either a software fault, or possibly an internal switching fault in the box. Alas, the former is a dealer job, and the latter is a dealer/auto tranny specialist job.

Good luck.

"The 107 is a true auto job, with torque converter and clutch pack"
That would be an interesting box. It has to be one or the other..

The MMT and 2 Tronic box are very similar but Toyota build in a slight clutch engagement to give a mild creep which they call "easystart". It has nothing like the creep of a conventional torque convertor automatic box but does what it says.
Hopefully, as you say, there is something wrong that can be fixed. My problem will be trying to drmonstrate the situation unless it shows up in a diagnostic test

[Geriatric]

Originally Posted by chopper1192

Toyotas MMT transmission is mechanically a manual box, but mechanically manipulated and electronically controlled to work like an auto. It is not really a relevant comparison for the 107..

The 107 is a true auto job, with torque converter and clutch pack. Modern electronically governed true autos have little or no creep to prevent damage from people holding them stationary in D. When they work the switching is very sensitive and fine control is possible, so using the gas to park or pop her in the garage is an easy task.

The box ECU should sense the revs rising and engage the clutch pack, and off you go. There's either a software fault, or possibly an internal switching fault in the box. Alas, the former is a dealer job, and the latter is a dealer/auto tranny specialist job.

Good luck.

"The 107 is a true auto job, with torque converter and clutch pack"
That would be an interesting box. It has to be one or the other..

The MMT and 2 Tronic box are very similar but Toyota build in a slight clutch engagement to give a mild creep which they call "easystart". It has nothing like the creep of a conventional torque convertor automatic box but does what it says.
Hopefully, as you say, there is something wrong that can be fixed. My problem will be trying to drmonstrate the situation unless it shows up in a diagnostic test

[chopper1192]

The architecture of the MMT is that of a manual, complete with both layshaft and mainshaft. It is electronically shifted to mimic the behaviour of an auto. I've a schematic on PDF from Toyota if anyone is having trouble with insomnia.

The 107 is a proper auto, in that it employs a torque converter. The unit is manufactured by ZF.

There is virtually no mechanical similarity between the two.

I reckon, though it's gut feeling with a dose of best guess, that a software update might solve your woes and see you happy again

[Geriatric]

I so not kbow where the confusion lies but the 107 has a 2Tronic box which is one of the many boxes licensed from Porsche under their Tiptronic patent and appear from most manufacturers under a multitude of tronic names.
These boxes do not have a torque converter as fitted to conventional automatic boxes.
They obviously have torque sensors to determine when gears change and the clutch is activated.

[chopper1192]

The 4 speed 107 unit, developed by Aisin AW and also built under licence by ZF in Europe, is not an automated manual like the 6 speed unit used elsewhere in the PSA range, and is not one of the Porsche Einspritzen licenced units, whereas the 6 speed PSA unit is.

When I'm at home on a proper computer I'll pull off a schematic, and you can then decide for yourself what's wrong with it.

[Geriatric]

Originally Posted by chopper1192

The 4 speed 107 unit, developed by Aisin AW and also built under licence by ZF in Europe, is not an automated manual like the 6 speed unit used elsewhere in the PSA range, and is not one of the Porsche Einspritzen licenced units, whereas the 6 speed PSA unit is.

When I'm at home on a proper computer I'll pull off a schematic, and you can then decide for yourself what's wrong with it.

Not wishing to be inpolite but what you write is mostly wrong . I do not know where you ger your info. from but you are totally incorrect regarding the 2Tronic box as fitted to the 107.
In a purely humorous mode do not bother with any schematics just pull the trigger. Subject closed as far as I am concerned.

[bettyswollocks]

Geriatric i don`t think you know chopper , us pure mortals here can tell you but i`m sure you`ve heard of the story about a dog and it`s bone, let battle commence .

[chopper1192]

Home now. Checked Servicebox - apart from the actuators (B0F 2 24B 01A) nothing at all on there for the auto. The assumption I make from this is that Pug don't fanny about repairing them and just replace the whole unit if it's faulty, so a proper auto box specialist may be your best bet, unless it's under warranty.