Dutchrockboy wrote:

I have this Transmission problem. TC is not closing in high gears.

The Sollution in the eyes of the "friendly people" is changing the TC.
that does not close the TC. A new TC just conceils the symptoms.

The other sollution of "the lying" people is to built in a new transmission.

I hate to change a 2-3k€ Part wenn a 10 cents part is faulty.

I came along this video:
A video of a BMW with aZF6HP26 transmission. The same i had in my BMW 730 and the same as the LR3.
In the Comments: "Mechatronic/valve body that controls the oil pressure to the torque converter's clutch is worn out and leaks enough for the pressure to decrease enough to disengage the clutch. After that it gets a surge of pressure and locks up again."

Also this Comment:

Anyway, for the usual surging there are many reasons.

1) solenoid controlling the valve is dirty/going bad
2) seals in that valve are bad. For that there's http://www.sonnax.com/parts/4379-zip-kit
3) the actual metal body is worn. In that case, the cylinder would need to be bored and oversized valve installed
4) clutch of the torque converter is worn out


So number 2 is the 0,10€ seal am looking for. I want to start checking if this seal is faults and after that i can change the more expensive bits.

Here is a kit a could use for that: http://www.sonnax.com/parts/4379-zip-kit


I also found this link: https://sayyarti.wordpress.com/2015/01/20/...on-issues/
and
http://d2q1ebiag300ih.cloudfront.net/uploa...1497990557

This is also very informativ.

I will do some more logging as soon as my Instrument Cluster gets back to me.
I hope to find out with which values i can pinpont the failure.

But i have a feeling i am getting nearer....

Dutchrockboy: Have you done the Mechatronic yet? I have shudder during acceleration and the rpm needle are fluctuating in steady motorway speed at 100-120 km/h and 1700-2100 rpm
I would love to change a small part my self instead of a complete overhauled gearbox