Re: 99 Ford Explorer seems to slip in bad weather

The control trac (auto-mode) is supposed to react to wheel slip and engage 
4WD, perhaps that is what you are feeling.  If you switch it to 4WD 
full-time does the "slippage" go away? (don't run it this way on dry 
pavement though)  It may be normal but if it seems to happen at strange 
times you could have a sensor issue.

Or could it be the antilock brakes (are you braking?).

-- 
Allan Williams



"jbug" <juliacrawford@[EMAIL PROTECTED]
> wrote in message 
news:520ed3b2-0bc3-4924-b7ea-1c2936bfa9ef@[EMAIL PROTECTED]
>I am driving a 99 Ford Explorer with about 140K miles and I have
> noticed on a couple of occasions the the front wheels seem to slip.
> The first time it happened it was really snowy and icy but I didn't
> put it together with the idea that it might be my 4WD. Then nothing
> happen for a couple of weeks but the roads were dry. Now the roads are
> bad again. If I drive about 50mph I don't notice much of a problem but
> if I get going 50mph or over it seems like the 4WD engages and then
> disengages, especially on icy spots and it makes a loud noise kind of
> like a clunking  (the rpm does not go up or down during the slip). If
> the roads are clear there is no problem. Any ideas? Obviously I have
> no idea what is going on....is there front speed sensor too?  What
> should I do next?