When braking HARD from 80-60 to slow the car down I get this vibration from the front, but as soon as I take my foot off the brakes the car is normal.

One time i was doing like 80-90 and deiced to slow down fast I would hit the brakes at any speed even 20-40 mph and the car would give me a vibration while braking. I pulled over and waited like 2 min to check everything out and and all of the sudden got back in the car and stated to drive at the low and high speeds and then brake there was no vibration at all.

The problem is: on normal driving condition everything is OK. Sometimes I try braking hard to reproduce the problem and there is no vibration at all.

Could it be warp rotors? shims? ....???

 

one possibility that i could think of... uneven pad transfer to your rotors...

 

Sounds like warped/warping rotors. You could try and get them turned (resurfaced) to see if that helps, but if they have a lot of miles on them already you're better off replacing them.

 

Do you feel it in your steering wheel or in the car? It is definitely warped rotors, but depending where you feel it is going to determine if it is front or rear rotors. Could be both front and rear though.

 

I had this issue, I resurfaced my rotors and sanded my pads a bit all good now.

 

i think that happened because i had cheap pads b4 for about 3-4k miles

 

i should have some warranty ...i will check ....but what drives me crazy is that it is random at hard braking ...and i think the higher the temp the more it shakes

 

i found out elsewhere in the forums that it could be bad compression rod bushings... well i guess this is the case when the car is paid off and into it's 6th year of driving and a couple of years with the dreaded fillet style round curb driveway of new housing developments.. my old house that the parents live in have the lowered driveway ramp and was a smoother transition than the new speed bump driveways...

 

It's your rotors/pads, but it could be a sticking caliper too. Have the rotors measured for thickness and hubs/rotors measured for runout.