Just saw this message on my moms 1998 VDP.

"High Gearbox Temperature"

Is it dangerous to drive.

Never saw that before.

 

I think I saw that in a thread a couple of years ago and it was caused by a weak battery.

 

I replaced a few ZF 5HP24 gearbox internal harnesses when I worked at the dealer back in the day.
The problem was usually a faulty thermistor in the harness but it is part of the harness.

You can monitor the temp if you have the right equipment but we can only guess without a proper diagnosis.

bob

 

I do have a fluke 87 with the temp accessorie.

 

I am talking about monitoring the gearbox temp sensor that is part of the internal harness. You might rig up some way to measure the ACTUAL temp but the TCM relies on the thermistor as input.

The actual temp is usually fine but the internal sensor fails intermittently giving a false reading to the TCM that is triggering the DTC.

bob

 

Mine did the same thing right after I bought it. While at the dealer for some parts, I picked the head mechanic's brain and he said it's usually a leaky seal on the sensor or the sensor itself is not good.

 

I agree, replaced a few myself under warranty. Get the codes read and monitor temperature visit temp sensor and compare with infra red temp gun.