Vibration at slow speeds

[DropTopDon]

I have noticed that there is quite a vibration in my jeep when I am breaking to slow down and get to speeds of 0-10 mph. It is quite noticeable and it almost feels as if the whole vehicle is shaking in some sorts. I can sometimes see the hood bobbing up and down very subtly as well. I plan on taping a camera to my frame to record my driveshaft and see if that could be the reason for this. I don't think it has anything to do with my steering components because they feel just fine. What advice is there for me to diagnose this?

 

[lulzpwndyah]

brakes is something else to look at.

 

[Rubicon88]

Warped rotors

 

[Rubicon88]

To add...
Too many people do their own brakes and have this old school thinking of only replacing pads.

Well...

How many garages today do you see that promote cutting rotors? It's a lone gone service. Why? Rotors are so cheap now (and garbage) that you really need to change the pads alomg with new rotors.
I don't cut rotors or drums any longer as it's foolish to get the machine all set up to cut a new surface when I can just buy a new one for the customer for approximately $30 there of

If you don't chabge both pad and rotors you just wear the new pads goofy because your rotor is messed up. Then people don't understand because they just "did a brake job"

Your rotors are warped.

Good luck.

 

[Vinman]

What tires are on the Jeep?

 

[cpwolf]

I would agree with @Rubicon88 thata rotors have become disposable. Machining them, I called around for an hour and couldn’t find a place that would, crazy.

Warped is the common term, but it can sometimes be bad braking buildup that creates an uneven surface, many have correctly pointed out they aren’t warped actually, but that’s The common term, but actual warping is rare, but heck same difference.

If they still look thick a quick machining would help, or you can pull and run some heavy sandpaper both sides, clean it and see if it’s better. It’ll answer pretty easily that the brakes are the problem, oh and brake cleaner after sanding.

 

[cpwolf]

@Jerry Bransford had a good Tip about not babying the brakes, what my brother yelled “don’t ride the brake like a chick” when he taught me to drive (80’s and he’s not PC). Jerry said it will slowly heat and leave pad resin that mishapes, very technical answer he gave for the lesson my brother so abruptly stamped on my brain, ha.

May be the issue messing with your rotors and will cause what you describe.

 

[DropTopDon]

To everyone advising its the rotors, I replaced the rotors and pads about a year and a half ago. Could it still be that they are worn and warped? I was thinking it could be my driveshaft or the pinion angle perhaps. Thank you to everyone who is offering their help btw.

 

[DropTopDon]

What tires are on the Jeep?

33x10.50r15 BFG KM2's. They are just about bald but with a generous 30% tread left on them. Do you think it could be uneven wear on the tires playing in on the vibration? It has been about 10k miles since they were rotated, but I plan on getting new tires by the end of this month.

 

[cpwolf]

33x10.50r15 BFG KM2's. They are just about bald but with a generous 30% tread left on them. Do you think it could be uneven wear on the tires playing in on the vibration? It has been about 10k miles since they were rotated, but I plan on getting new tires by the end of this month.

Easy to find out, throw it up, switch front and back, and see if there is a difference. If it’s the tires, highly unlikely they will feel the same.

It feels the same, then not a tire issue. 10k still not good for rotating, should do that more often

 

[cpwolf]

To everyone advising its the rotors, I replaced the rotors and pads about a year and a half ago. Could it still be that they are worn and warped? I was thinking it could be my driveshaft or the pinion angle perhaps. Thank you to everyone who is offering their help btw.

If you didn’t break them in properly (if needed and most should)

or you drive poorly, absolutely they can be bad.

 

[Vinman]

33x10.50r15 BFG KM2's. They are just about bald but with a generous 30% tread left on them. Do you think it could be uneven wear on the tires playing in on the vibration? It has been about 10k miles since they were rotated, but I plan on getting new tires by the end of this month.

Exactly what I was getting at, rotate the tires and see if the vibration changes.

 

[Rubicon88]

To everyone advising its the rotors, I replaced the rotors and pads about a year and a half ago. Could it still be that they are worn and warped? I was thinking it could be my driveshaft or the pinion angle perhaps. Thank you to everyone who is offering their help btw.

YES!!

Please notice what I said.
I'm not being malicious but many people just slap pads on (and rotors) and act like everything is great.

You MUST I repeat MUST make sure everything is free flowing on both wheels. Meaning the pads can be moved with your fingers...the slide pins need to be free of rust and distortion free...and need greased liberally.

I've had pads for people that I needed to spend 5 mins grinding the mounting surfaces down as they were too big to free flow. Right out of the box

See that can cause a pad to only apply at an angle among other things.


Lastly...even with properly flowing pads you literally can ruin new rotors today. Absolutely positively damn straight you can. They are junk to begin with and moreover your driving style could indeed ruin them that quick.

I'm not suggesting you don't know how to properly do brakes or drive....just saying it is a very real possibility in only 18 months for those rotors to be trash.

Good luck.

 

[LONGJP2]

Maybe a bad hub assembly. Check for wheel (or disk) run out with a dial indicator.

 

[MaximusLJR06]

I had a horrible vibration for the last year at slow speeds 5-10mph. I knew it was my tires though and didnt worry about it. I got new tires a month ago and its no longer present. I hadnt rotated them enough and they became choppy.