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#1
05-10-2004, 05:56 PM
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bouncing while brakeing
Hello all,
 I have a 98 ram with drums on the back. My question is, why does it bounce when I am coming to a stop? I had a bad drum when I did my brakes so I bought a new one, but the bounce is still there. It dont bounce enough to leave the road or nothing, but its kinda a pain in the a$$. Any comments or suggestions will be appreciated. 
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68 Mustang Coupe 
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#2
05-10-2004, 08:06 PM
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Re: bouncing while brakeing
You're stoned and it just feels like it's bouncing to you.
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#3
05-10-2004, 09:17 PM
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Re: bouncing while brakeing
is it in the front or back? you probably need to turn the rotors and drums, or drum in your case
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#4
05-11-2004, 08:33 AM
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Re: bouncing while brakeing
Check this:
1. Warped or out of round rotors.... 2. Bent backing plate (rear brakes) 3. Out of round or damaged rear drum (unusual) 4. Poor surfacing on front rotors. 5. Rear shoes improperly installed or adjusted. 6. Contaminated brake shoes or pads. Here's a good way to test. drive your truck and stop it with the parking brake, not the brake pedal. If it shimmies and shakes, it's the rear brakes, if there's no shakin' then its the front. I can't rule out that your truck could have a bad idler arm, centerlink, steering coupler, Ball joints or tie rod ends, or even Just bad tires too. Ok, I think I covered everything that could cause it the rest is just for fun: 1.The motor..... ok, maybe your motor's shakin' at a stop too.... 2. Your stereo is too loud. 3. Some body keeps bumping into you, and you can't see the little hundai stuck to your hitch ball! 4. Two people are in your truck bed, and thought they wouldn't get caught there... 5. You are dragging your dog... (National Lampoon's 'Vacation'...Lump,the no-legged dog [joecartoon.com]) 6. Your pager is going off. 7. There's 300 potholes between home and the convenience store, and you hit ALL of them...  Slantsixness
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 If I knew what I did to break it, I would've known not to do what I did.www.classicwinnebago.com
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#5
05-14-2004, 03:33 PM
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OK, being Stoned, not out of the question.
 It bounces in the back. One drum was bad so I changed it and the brakes on that side. The other sides brakes were as thick as the new ones, so I skipped it. My hogs head has oil on it around the plug and its made its way to the bottom of the rear end. No drips, just overfilled maybe. I bought the truck with 66,000 on it. Could the universal joint be bad? It clunks going from 1st to 2nd if Im going slow. How can I check the rear ends oil or grease, whatever it takes? 
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68 Mustang Coupe
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#6
05-14-2004, 03:48 PM
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Re: bouncing while brakeing
Does it bounce in sync with a grab-let-go-grab or does it just bounce as you come to a stop?
Check shocks - they may be just that weak . . . Check drums - one, or both, could be egg shaped and that will make it act funny . . . Check u-joints - one froze in place may cause the clunk, but this wouldn't make just braking act weird . . .
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Cheryl . . . Mom, mechanic, and gopher  1, 8, 4, 3, 6, 5, 7, 2 What do you mean I can't use that on a FORD?
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#7
05-14-2004, 11:50 PM
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Hi Cheryl, thanks for the reply.
It happens when i'm coming to a stop, and I feel it really bad when I exit the Highway. Back shocks look to be orig, front look to have been changed. I guess I should break it down on all 4 wheels and see what it looks like. Can I grease the Uni Joint? Have'nt lubed it since I bought it either. Anyway, will check a couple things and get back. Thanks again for the time and info everybody.  PEACE
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68 Mustang Coupe
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#8
05-15-2004, 04:12 AM
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Well, now that I'm paying attention, it happens at around 35 to 40 mph. Dont know the history on this truck, bought it with 65,000 on the OD. Does it sound like a bent axle? Gonna check all the brakes to see what shape they are in. TIA
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68 Mustang Coupe
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#9
05-17-2004, 08:50 AM
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Re: bouncing while brakeing
[quote=grourown420]OK, being Stoned, not out of the question.
It bounces in the back. One drum was bad so I changed it and the brakes on that side. The other sides brakes were as thick as the new ones, so I skipped it. My hogs head has oil on it around the plug and its made its way to the bottom of the rear end. No drips, just overfilled maybe. I bought the truck with 66,000 on it. Could the universal joint be bad? It clunks going from 1st to 2nd if Im going slow. How can I check the rear ends oil or grease, whatever it takes? Uh, you didn't change the brakes on the other side? you are stoned.  why did the 1 drum wear out? are the brakes or the hardware hanging up? Is your parking brake stuck or rusted stuck? You can lube a u-joint. Just don't lube yer joint Seriously, change the u-joints (both) but it probably is not the problem. If you have a sure grip, lack or fluid and the mopar additive, can cause funky noises, vibration, chattering at different speeds. (used to be called "Chatter-moan syndrome") remove the plug in the rear end and fill it! try it, what you got to lose? Time? good luck, Slantsixness
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If I knew what I did to break it, I would've known not to do what I did.www.classicwinnebago.com
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#10
05-20-2004, 08:20 PM
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I have a 1997 ram extended cab with 360 V8 and its 2 wheel drive that did the same thing (bouncing violently when coming to a stop). It started this after my mother brushed the passenger side of the truck with a tree when she got run off the road by some SOB on a dune buggy. But anyway, at first, we were just going to let the dents go as to not raise our insurance rate any higher than it already is. But then we noticed the bouncing. We sent it to a mechanic who has a vehicle lift and we had the ball joints in the front changed and has the rotors turned, new calipers, and new brake lines. We got the truck back and still no dice. Didn't help a lick. So we put up with it for a while and it was only getting worse. Well, we decided to take a look underneath the truck (we had many times before) and thats when we found our problem. There are 2 brackets that hold the lower control arm for each wheel on the front onto the frame of the truck (on a 2WD anyway). These brackets are welded to the frame, not bolted. One of the 2 brakets had broken completely in half and was hanging on by the other bracket. Our only asumption for why we could find out what the problem was we that the break was clean and when the weight was taken of of the wheel (in other words, when the truck was put on the lift at the mechanics) the bracket fit back together perfectly. We didn't know how much it would cost to have fixed so we turned all the damages into the insurance company and had everything fixed, including the bracket (all they did was weld it back together) and it hasn't happened since. This is just my story. I have heard that an after marked, heavy duty steering stabalizer helps, too.
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#11
05-29-2004, 01:24 AM
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Re: bouncing while brakeing
I have to agree with Slant, never, ever replace only one side of your brakes. You can do only the front, or only the rear. But, whatever you do to the left side, you do to the right side! On a vehicle with 4 wheels there are two places you never take short cuts, that is your brakes and steering!
Now, as for your bouncing. your u-joints could certainly be the culprits here, but it sounds to me like your rear drums are in need of machining. I have a '96 1500 Sport that gets that same feeling every 20,000 Km or so, I haul my boat so it is not unusual for me to service my brakes twice per year. I don't usually have to replace any parts but one hour on the hoist buys me peace of mind and a comfortable ride for the year.
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