I was in search of new steering knuckles and everyone wants to know if i have 4 wheel abs or rear wheel abs. How would i know if i do? when i slam on the brakes the back tires lock up. But i have front disc and rear drum. its an 01 ext cab 3.9 v6 auto if that helps.

 

Call a local dealer with your VIN number and they will be able to tell you over the phone.

 

The only thing I can think of is that if you have four wheel ABS, then your spindle has a provision for the sensor, and if you don't it doesn't. I noticed there is a pretty big difference in price between the two. Look at the spindle assembly and see if you see a wire coming from it. If there is, you probably have the four wheel ABS.

 

alright. thanks for the info. Here is another question i have, ricbrk your calling it a spindle, i thought the older trucks had spindles and the newer ones had steering knuckles? Am i wrong? I've seen a lot places call the steering knuckles numerous different things. Like knee assembly and some say its part of the strut assembly. what is up with all this?

 

If you look at the inside (backside) of your front brakes/hub assembly you would see a plastic wire running down from the upper control arm in addition to the hydralic line for the brakes. The plastic wire case leads to the abs pickup sensor. the sensor is mounted over the teath of what looks like a gear ring. the sensor reads the spead the teeth are moving and this is compared to the other front axle and the rear axle sensor.

To road test you have to brake really hard or get on a slippery surface, front abs prevents lockup and allows you to steer when in one of those situations. The standard rear abs just keeps the rear from passing you in a panic stop or slide. I've tested just rear abs in the snow and the front tires lock up almost instantly and you just slide in what ever direction you were going.

 

or just look at the abs controler, count ur tines going in and out dont even have to get on the ground for that!

 

where would the abs controller be?