Thread: gearbox and cruise control.

If you keep increasing the speed with the cruise button, it should eventually lock.

For some reason certain revisions of the TCU run vastly different cruise settings, it's really annoying!

I have run it for 20ks at 100ish and it never locked.isn't an issue as long as you know about it.specially if you tow a heavy van in 3rd and think it is locked.

Normally the TCU should do it's job based on it's operation mode described in the WSM:

Increased load/reduced torque compensation
To aid performance and driveability in the high range economy mode, the EAT ECU has three adaptive shift and lockup
maps. These maps delay upshifts and torque converter lock-up similar to the sport mode if the inputs from the
engine indicate:
- A sustained high load on the engine, such as occurs when the vehicle is ascending a steep gradient or towing a
trailer.
- A lower than normal engine torque, such as occurs at altitude or high ambient temperatures.
The EAT ECU monitors the engine inputs and selects the most appropriate adaptive map for the prevailing conditions.