Hey guys, i have a 1961 bug and i am experiencing a pulsating brake pedal when i am braking. I recently put new disc brakes on the front, and they work great. I checked to see if they have warped, but they are 100% perfect. The car still has drums on the rear, and i believe they are the cause. When i lightly pull up the hand brake whilst in motion the handbrake pulsates, and the car comes to a stop in a jerky motion(like as if the brake goes on and off on and off etc). I thought ok, my drums are warped. I got them machined at a brake shop, put them back on my car and it still pulsates a little bit, but not as much. What could be the problem? should i just convert to discs in the rear to completely eliminate this issue? my car is also lowered with abit of neg camber on wider wheels as well. Has this got anything to do with it?

Cheers guys

Hi

Wide 5 wheels can distort the brake drum very easily, try removing the wheels and re tightening the wheels nut with a tension wrench, but only tighten every 2nd one.

The wheels can be bent which will also distort the drum.

Steve

Steve is onto it exactly, only thing to add is that the machining is hard to do acurately without a jig/axle to hold the drum as it sits on the car

That would be your ABS brake feedback. You can turn it off. If you look past your paddle shifter, its the button between the rear parking sensor & camera controller & the climate control a/cond dial. Hope this helps.

as per above DONT do the wheel bolts up with a rattle gun

from memeory i think they are 22 ft lbs

Would it be too late now? As i did them up pretty tight. Would the drums be out of round again? I will back them off and see what it does. Cheers!

Rear wheel bearing cactus??!

A couple of things to remember :-

NEVER leave the handbrake on hard over-night, when the brakes are hot.

ALWAYS torque the wheel nuts/studs to 72 ft/lbs...no more.

Are the "wider wheels" steel rims, welded to original centres? If so, this could be the cause of the drum distortion. If the centres aren't perfectly flat and true, the wheels can pull the drums out of shape.

hmm, when ever i come home i always pull the handbrake on. I am not too sure about the wheels, i bought them off some bloke. Will converting to disc brakes eliminate this issue completely?

Let us know the problem once diagnosed?