why does my truck lock up the brakes and slide when I brake hard in a emergency

maybe someone can answer whenever possible. I know I need to bleed the brakes thats number one I installed new brakes pads recently. But why do my brakes lock and the car slides after a emergency stop. They shouldnt do that am I right? So would bledding the brakes prevent this from hhappening?

 

If your ABS is operating correctly then it should not be possible to do what you describe. ABS systems have been mandatory in all vehicles for a long time.
The system is designed to take over control of the brakes when you put enough pressure on the peddle to start a skid. Then, the brakes are applied automatically with micro impulses (feels like chattering at your foot) that theoretically will stop the vehicle faster than being locked up.
Get your truck diagnosed.

 

Sounds like abs is disabled and you don't know how to threshold brake.

 

Ok I was driving a little to fast I wasnt going to run a light so I slammed the brakes on and I started sliding and coudnt stop sliding.?

 

if your going to fast and the roads slick nothings going to stop you from sliding. ABS will try. but its not foolproof.

Tires, tires are the most important thing when it comes to stopping, shitty tires, shitty stopping. (pads and rotors too. but the tires make contact to the ground)

 

That day the road was slick and it had just rained. the second day was dry and the car slowed to a fast stop I had to slam the brakes and all that happened was a slow brake then I slid maybe 3 feet

 

would a brake bleed help with sotpping force?

 

Are you sure they are locking up? Screeching tires, uninterrupted skid marks, smoke, all that?

 

None of that just straight slides

 

I put pads in but havent bleed the brakes the fluid is a lil above max it raised after I put in the new pads

 

Im effective when I drive and just would like to have assurance that. When I brake I going to come to a stop in instant.

 

Well you’re driving a 6,000 pound truck so it won’t but you should feel the ABS system in a panic stop situation.

 

So... I’m not sure what the OP is describing, whether it could be what I’ve experienced numerous times. The brakes on my 3rd gen kinda stutter when I brake hard— it does not feel more effective than solid braking and, in fact, feels out of control. It especially happens off-road. As long as I’ve had the truck, bought new. New tires. I haven’t hit anything yet but I don’t tailgate. Scary AF though.

 

Stutter? As in the pedal jumps back? If that’s the case it’s just the abs activating (I personally hate abs).

 

Yeah, me too. I can’t outsmart it. Feels like it might kill me.

 

I killed my ABS before it killed me.

Nick, what I think you are describing is actually the ABS at work, its actually preventing you from sliding. The bad side of ABS though is that it actually prevents you from stopping. ABS was never about shortening stopping distances, it doesn't do that. Its the opposite, it maintains steering control at the expense of stopping distance. Depending on the road surface it can nearly double stopping distance. Why it was mandated I will never know, statistically, it increases fatalities.

Well, your never going to stop a truck in an instant no matter what. Laws of physics etc. But you may want to look up how to disable the ABS on your truck. I have a first gen so what I did may not work for you (pulling the abs fuses)

 

Unless you cracked open a bleeder or had a line open you shouldn't have any air in your brake system. The pedal should be at the top and tight. The reason your reservoir is over max is because when the pads wear down the fluid level drops and when you install new pads it comes back up. Adding fluid causes this. Some brake pads have to wear a little bit before they act rite. Sounds pretty normal to me

 

Thanks for this info. Haven’t really seen this simple an explanation before, but yes, I’ve experienced that the stopping distance is actually longer when the stuttering kicks in. ABS fuse....

 

Do you have a link to the increased fatalities statistic?

 

You'd end up going through the windshield if you stopped on an instant

As other have described, it's your ABS helping you keep control, not shorten the stopping distance.

 

https://en.m.wikipedia.org/wiki/Anti-lock_braking_system

 

Ah yeah, looks legit, huh? So... the answer to original question is no?

 

ABS helps the average driver A LOT. With ABS you maintain as much control as possible, at the expense of a little braking distance. Threshold braking will stop a vehicle the fastest - and you can still do it with ABS active. If you feel the chattering then the electronics are helping you, and you're not as good as you think you are if you were going for threshold braking. Threshold braking on slick surfaces is incredibly tough to do - ABS kicks in on me on ice at about 25% braking pressure. That's just the nature of driving a big heavy vehicle.

If you feel the chattering, the electronics are stopping you faster than you would have without ABS. https://www.youtube.com/watch?v=mKiTAcXK6M. That video doesn't bring in threshold braking, but we're not in a race so a few feet of extra stopping distance isn't worth losing 10's of feet if you mess it up.