Thread: A Different Transmission Fault

Make sure all your software is up to date is the first thing I'd try.

Thanks Rich,

All the software was updated just over a year ago, including transmission and transfer case software.

cheers,
Terry

Terry, I've had the same fault pop up twice in a month. Exactly the same symptoms as you:
-Transmission Fault message on dash.
-Selecting sport mode or manual mode doesn't do anything.
-The torque converter clutch stops locking up and revs go all over the place in all gears. Acceleration is generally much slower without the lockup clutch! Does yours do this?

Both times this has happened going up a steep rutted hill, one time towing a trailer.

Hasn't reappeared in any other situations. I was going to do a full trans flush with steel pan and also an auxiliary cooler in place of the radiator cooler.

Could be taillight bulbs, the couple of times I've had similar faults one of the tail light bulbs has blown a few days later.

Regards,
Tote

Mine is giving similar faults randomly usually accompanied by HDC and parking brake errors. I suspect the canbus and the connection to the transmission ECU especially since the last time it occurred after I washed it. I'm going to clean the connector to the transmission ECU.

I noticed a park brake error pop up last time as well. It does seem to happen more often then not on bumpy roads which I guess suggests something is loose. I checked and none of the bulbs are blown.

I would imagine it is not related but the fuel gauge is now very unreliable and is randomly reading all over the place, to the point I ran out of fuel on Monday in the middle of no where and had to get towed home.

My fuel gauge generally reads OK, though sometimes it reads 7/8 full when it isn't. I ran out on Tuesday (reading 7/8 full) when I forgot I had reset my trip meter and subsequently didn't top up the main tank from the auxiliary.
I always reset my trip meter when I fill up and generally top up the main tank at 500km and refill both tanks before 1200km.

Bleeding the fuel system is a pain when the fuel is hot .

As far as I can tell the fuel gauge and the transmission problems are separate.

From what I have found reading on various forums the connection to the transmission ECU is susceptible to corrosion and can give the errors we are seeing. This was the reason they moved the ECU to the 2nd battery tray on the D4.
I am away again this weekend so won't get to look at it until the next. I'll report what I find.

That is exactly what my fuel gauge started doing a couple of months ago and come to think of it it was about the same time the auto error light starting popping up.

So it might be a just a coincidence that we both have the same issues or maybe they are related?