[Guest]

Ok.. a month ago I was doing some rock trails and dune off roading and when I was trying to slow down and stop in the sand (only going 5 miles per hour) the dreaks shuddered and allmost didn't stop. I thought it was strange and just checked the fluid and the break system.. Well today I found a mud field. =) And I was making laps in 4 high and when I went to stop going slow it happened again. now I know it's the anti lock breaks thinking I am skidding (which I was doing in the mud) and it's kinda scarey because the break just pulsed and didn't want to stop.
I have a 1995 XLT Bronco with a auto trans, 351.. Do people have to take the anti lock fuse out while in the dirt? Is my system working like it should? Whats the fix for this and has it happened to anyone else. ?

 

[muddybronco]

that could be either the abs doing its job, or the sensor getting coated in mud and thinking the wheel is locked. you can add a switch to the abs circuit and turn it off at will, though I believe you have to turn the engine off to turn the abs back on.

 

[Guest]

Well it also happened in the sand and I know I didn't have sand far enough in the wheels to make it do that. I just think the dumb abs works too good. You would think the ABs would turn off in 4 wheel drive

 

[1283]

While, it would be nice to have the anti-locks turn off automatically when we go offroading, it wouldn't work very well for the times when we use 4wd on ice.

 

[Guest]

Who would want to off road in ice? Not too much rocks to go over.

 

[578]

a very similar threa was started on the chevy side a few weeks ago. basically we determined that we've got heavy vehicles. and that braking is a function of friction. and the friction force varies with normal force and the coeficient of kinetic friction. since mass stays the same, the normal force sytays the same. but the coefficient of friction for roads varies a hell of a lot compared to mud (where this msot often takes place) basically the ABS tries to do its job, but there is just so little friction that the system has a hard time dealing with it. i mean it will handle the task, but when you're stopping 5-7K pounds depending on truck and tools aboard, it just isnt going to stop fast on mud. that pretty much it. i think your system is working fine, its just tricky terrain for it to work