T5 4motion question

[BLog]

Does anyone know if the 4motion system on the T5 can be disabled electronically leaving the vehicle front wheel drive only? I believe the system works by sending constant power to the rear diff that has a built in clutch pack controlled by a computer. If this signal was shut down somehow would the van become two wheel drive?

I used to own an all-wheel drive Nissan and by pulling a fuse it became rear wheel drive only - this made me wonder if the 4motion system could be disabled in a similar manner.

[jets]

Talk to Solitaire. The T4 has a freewheel device that disconnects the rear diff whenever you are travelling forward. It locks up when there is a difference of speed between front & rear wheels. When reverse is selected it always engages 4wd. My guess is that the T5 4motion would be an evolution of the Syncro system, but as I said you should talk to Solitaire.

[Guy_H]

You can disconnect the Haldex controller by unplugging it (on the rear differential).

Not recommended for long term as the tailshaft continued to spin & it can overheat the rear clutch packs.

We use it for short term (ie: dyno testing on 2WD dyno's).

I had a customer in yesterday who is fitted an LSD in the rear, he has actually been running without the rear diff or tailshaft installed for quite a long time!

[BLog]

Thanks Guy H,

I might have to put my van on a dyno to test speedo accuracy and I was wondering if a 2wd dyno would do - that’s answered my question. Cheers.

[dct]

Out of curiosity, what is the benefit of checking speedo accuracy on a dyno v checking with a GPS?

Cheers

David

[BLog]

I want to put larger rims on my van but it seems the only way I can do that and keep it legal is to use a larger diameter tyre so the load ratings are maintained. I have spoken to wheelworx in Adelaide and they told me this can be done so long and the speedo is checked/recalibrated and they do this on a dyno.

[Floorshow]

Increasing overall wheel diameter even with a recalibrated speedo and correct load ratings may still be a illegal modification. Do your homework if you want to keep it legal.