Re: Heavy brake vibration
"JohnM" <firstname.lastname@example.org> wrote in message
> While this is my first post to the group I'd like to start by saying a
> very gracious thank you for all I've learned while lurking the past few
> I have a 1993 940 ABS/no turbo that is demonstrating some very powerful
> vibrations while braking. This happens when the brakes heat up and it
> gets worse the more I use them
> I installed new calipers and rotors (4) last summer - They calipers were
> rebuilt/loaded and have provided excellent service over the past year. The
> rotors were of high quality and the wheels have always torqued on.
> In the process of troubleshooting, I've checked bushings, shocks and
> driveshaft center bearing-- I pulled the front wheels over the weekend
> and found one seized caliper. At worst, that same problem with the rear
> brakes would be great
> I wonder if any of you have experienced anything similar or have an idea
> of what else it might be -
I have had a similar problem with our '85 765T when a tie rod was failing.
The boot had torn and the lubrication was lost. The shaking was noticable
with light brake application but became violent with moderate braking. When
I changed the tie rod I was amazed to find the play was only a mm or so. It
was detectable by jacking the wheel up and trying to turn it side to side
(like steering). I could feel the play, and watching the tie rod and
steering column (alternately) I could see the tie rod was moving when the
steering column was not.