I can't seem to find much about what goes on (technically) when I loose traction in my P38.
Can someone please tell me what systems there are in place and how I can use them effectively! I know that there is some form of electronic traction control, but I'm not sure how this works (although it seems to!) Is there a CDL? - albeit one that I cannot select myself.
Any info would be gratefully received.
Cheers,
Matt.
...and Matthew Maddock spake unto the tribes of Usenet, saying...
Traction control on the rear only, as far as I remember (P38, not Vogue). It's linked to the ABS system, detects if a wheel loses traction and applies the brake to that wheel, diverting torque to the wheel with the grip. It works pretty well, though obviously not as well as a full 4-wheel system.
You do nothing. There is no "driver input". Works well.
There is no CDL as such - there is a viscous coupling between front and rear shafts which automatically locks up if it detects more than a small amount of difference in rotational speeds. Works brilliantly, and again totally automatic.
HTH
The message from Matthew Maddock contains these words:
depends on year got better as time went on, ISTR later 1999? have 4 wheel traction control. Knew a chap who was getting stuck with excessive front wheel spin where jap crap was having no trouble, so suggested something wrong, after much hassle and visiting two or three dealers, the problem was finally diagnosed as "a less than fully efficient rear differential sir" .A new diff and the machine was a completly different drive!
Let's put the cat among the pigeons .... with a standard non-locking differential when a wheel spins the torque in the system plummets. Applying the brake to the spinning wheel (traction control as correctly described above) enables system torque to be regained which is then available to the wheel with traction. Arguably I'm being pedantic but that's not 'diversion'!
It's very much like plugging a leak in a pressurised pipe. Plug the leak and pressure is regained.
There is a driver choice when the TC kicks in. Do you just let it get on with it or ease of the go pedal a bit in the hope that the reduced torque will allow all four wheels to grip properly again.
...and Dougal spake unto the tribes of Usenet, saying...
I would agree. :-)
...and Dave Liquorice spake unto the tribes of Usenet, saying...
I meant no driver input, as in buttons, levers etc. What you're describing is good driving.
Depends on model too. My Australian poverty pack '98 4.0 p38 seems to have no rear traction control at all, certainly I've been in situations where it's been needed & had rear wheelspin but no telltale on the dash showing rear diff lockup activity (the manual describes this as happening when rear spin occurs, but my owners manual also covers the HSE). Very disappointing, I was embarassed by the Japs as well...
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