Balik ulit and vibrating brake pedal problem ko...

[wiretap_md]

Haaay.... the mild vibrating brake pedal problem of mine still persists. I changed my front rotors to original Suzuki rotors this morning and still its there. I don't know what else to think of that could be causing the problem. I initially had the front rotors and rear drums refaced 2 weeks ago and changed the front brake pads and rear shoes. Still may vibration. Had my front bearings repacked together with the front CV boot a few days ago. Still meron. And this morning, I changed the front rotors already thinking na baka talaga warped siya which could not be remedied by refacing already. Still meron. Naku. I don't know what to do anymore. Ano, palit naman ako rear brake drums to brand new ones? What do you think? I've totally eliminated na everything. Perfect and alignment ko and wheel balancing.

Suggestions please guys. Thanks!

[Ungas]

Propeller balancing.

[wiretap_md]

If the propeller is the culprit, di ba dapat na the vibration should be constant even if I'm not braking or applying pressure to the brake pedal? The vibration kasi is felt only on the brake pedal when I apply braking force.

[Ungas]

Try to step on your clutch before stepping on the brakes to make the vehicle stop. Pag nawala ang vibration, hindi galing sa prop shaft.

Not necessarily constant. Minsan pag apply mo ng brakes while using engine braking system, yan ang cause.

[wiretap_md]

Jon, baka opposite...if I press on the clutch, I disconnect the engine and drive shaft from the drivetrain so if the vibration persists after doing that, then it means the source might be coming from the brakes itself. Correct me please if I'm wrong.

[Ungas]

Yun nga, hehehe. Medyo nalito rin ako dun sa post ko.

[wheelieboi]

sir di kaya crossjoints/crossbearing or spider bearings ang problema mo? i had a problem similar din sa ganyan... yun nga lang may ingay yon. And parang ala ka atang namention na noise hehe

2 cents. lang po

[wiretap_md]

Tried Ungas' suggestion last night. Vibration still there kahit I pressed the clutch and put the transmission into neutral before braking. So the vibration must be coming from the brake system or its components.

wheelieboi: Yup, wala akong may marinig na ingay. And when I had the repacking done, I had them inspect the wheel bearings both sa wheel and the CV joint itself. No problems whatsoever.

[Jeepcruizerph]

ako naman nung bago lang yung crosswind tapos nireklamo ko sa isuzu pampanga nag tinginan yung dalawang mekanik......parang alam nila yung problem pero wala sila nagawa...lol

[Ungas]

Uneven tread wear can also be culprit.

[pajerokid]

Phil, Try the bearing check (ty to alfred). Jack up the front. hold the 12 and six o'clock ang try to wiggle the tire. pag may kalog even if 1mm lang, sira na bearings.

Jon, uneven tread wear (scalloping) means may sirang pang ilalim. Phil, better check your balljoints while youre at it.

[pajerokid]

oooops.. na-check na pala

[wiretap_md]

pajerokid: Hmmm...I'll try to have the bearings checked again. Pero kasi when it was repacked, sabi ng mechanic ok naman daw at walang tagas.

I posted my problem in the Zukiworld Suzuki forum and someone mentioned this suggestion:

You can try this and I've seen it work on a large heavy Bronco running 1-ton axles.

Lift the back end off the ground and let it hang off the ground freely. Secure the frame. Run the drivetrain in 2wd and watch the ds to see if it's out of round, see if the tranny mount is secure, see if the rear axle oscillates, feel the axle for vibrations, see if the shocks mounts are secure, see if the coil is secured; apply the brakes easily at first to try to bring the tires down from speed of 35 mph, see if you can see/feel anything. Then secure the rear axle on stands and the frame off the stands to provide a static load. See if you can determine a source in the rear.
Then do the same for the front in 4wd and with the rear ds disconnected (watch out for fluid loss since there is no flange on the t-case output).

It could be a bent wheel, loose wheel cylinder, broken brake return spring, broken/loose brake shoe, bent ds, out of round ds, bad u-joint, out of phase joints, bent axle housing, loose suspension component, loose pinion nut, or a bunch of other things.

On the Bronco, it turned out to be a bunch of things, loose track arm mount on axle, crack on frame, worn tie rods, broken tranny mount, and loose u-bolts of the rear ds on the pinion.

What do you think?

[5Speed]

medyo matrabaho yata yung suggestion na yon....kelangan eh sa talyer talaga gawin...

[rodcarolino]

how about a defective hydrovac? vibration may come from the vacumm itself

[Pencils]

Originally posted by wiretap_md
pajerokid: Hmmm...I'll try to have the bearings checked again. Pero kasi when it was repacked, sabi ng mechanic ok naman daw at walang tagas.

I posted my problem in the Zukiworld Suzuki forum and someone mentioned this suggestion:

You can try this and I've seen it work on a large heavy Bronco running 1-ton axles.

Lift the back end off the ground and let it hang off the ground freely. Secure the frame. Run the drivetrain in 2wd and watch the ds to see if it's out of round, see if the tranny mount is secure, see if the rear axle oscillates, feel the axle for vibrations, see if the shocks mounts are secure, see if the coil is secured; apply the brakes easily at first to try to bring the tires down from speed of 35 mph, see if you can see/feel anything. Then secure the rear axle on stands and the frame off the stands to provide a static load. See if you can determine a source in the rear.
Then do the same for the front in 4wd and with the rear ds disconnected (watch out for fluid loss since there is no flange on the t-case output).

It could be a bent wheel, loose wheel cylinder, broken brake return spring, broken/loose brake shoe, bent ds, out of round ds, bad u-joint, out of phase joints, bent axle housing, loose suspension component, loose pinion nut, or a bunch of other things.

On the Bronco, it turned out to be a bunch of things, loose track arm mount on axle, crack on frame, worn tie rods, broken tranny mount, and loose u-bolts of the rear ds on the pinion.

What do you think?

If you want to do that check it would be a lot safer and simpler to do it at a gas station and have the whole car lifted with the wheels free to spin. You can then have all the time in the world to do a series of checks and free space to examine your underbody safely. I did as much with my LC80 and found my own DS was out of balance.

[wiretap_md]

Guys, how would you know na out of balance na ang driveshaft while the car is lifted? Makikita mo na may wiggle?

[OTEP]

As per my advice in 4x4ph: pabayaan mo na lang. don't be so obsessive compulsive about it. hehehehe.

[Pencils]

Wiretap,


I doubt your DS is the problem as the vinration only appears when you step on the brake. I just felt it was to dangerous to be mucking about under the car while it was only jacked up with the engine running.

Find a knowledgeable friend and ask him to test drive the car and see what he thinks.

[levi]

I have the same problem for my Gen 2.5. I changed the brake disc rotor and it was solved, but after a few months balik ulit. Im looking for an aftermarket rotor but I havent seen any.