Gearshift Maps

[oab_au]

Originally Posted by NiftySVX

Do the VTD transmissions of this vintage experience frequent duty c failures like the ACT-4s do? I would imagine a failure of this solenoid on one of these would cause a fault that would result in no ability to "lock" the center diff. This would probably go unnoticed by the driver in most cases, but if this was a common failure they may have changed the solenoid to try and improve the system's reliability. Just a shot in the dark guess...

Yes they do have the same problems with the solenoid as the US models. They will bind, and they will spin the back wheels with the valve not working, you certainly would notice, as it can sit still on the grass spinning both back wheels.

I don't see it as often, as we see the US version, maybe 5 cases over the years, but that could just be due to there being more of the US type.
I would guess that it was to improve the operation of the valve, but why did they use the two different types in the early models.

Harvey.