Torque lock is a function of road speed and engine speed and certainly should not be effected by a slight engine temp drop. I suggest you get some dedicated diagnostics on the car otherwise you are chasing your tail.
Other than an over temp sensor on the oil cooler no. I have told him to get dedicated diag on it and look at the ECM and gearbox ECU interfacing. I cannot see how a small engine temp drop can effect torque lock.
That's sorted! Both coolant sensors replaced. Torque lock up at lower temperature and a more accurate temp gauge. One sensor was green from leaking into its own plug and the second had started to turn on the brass fitting as well as being fuzzy green. 33mpg av' at 70mph! Brilliant.
Update. All is good and a niggling water pump has raised its head, put it on the list along with the lower steering colum, headliner and brake sphere... What's your list?
It now sits just over a third to middle. Out side temp is about 11°, I've had the fan removed for the las two weeks. Chuffed to bits.
