I test drove a 1994 960 today and noticed a mild pulsing when applying the brakes while traveling at moderate (40mph) or higher speeds. Not a vibration but a slower pulse (possibly one pulse per wheel revolution - just a guess, though). The car was NOT pulling to one side or the other, and there were no noises. I could feel it in the pedal and possibly in the steering wheel as well. The car is equipped with ABS. For all I know this is completely normal for this car. But I don't know.

The seller's repair records indicate:

* front pads and rotors were replaced 16,000 miles ago
* left rear rotor and pads were replaced 24,000 miles ago

That's as far back as the records go (no repair records for the RIGHT rear brake assembly).

Is this most likely a rear rotor problem? If so, is it safe to continue driving the car in this condition indefinitely? And what is the likely cost of repair by an independent Volvo specialist? Based on the records, it looks like both rear rotors/pads are due for replacement, but I'd like to know if this is the source of the problem in any event.

 

Yes. That sounds like a rotor. Rotors are the easiest to replace, and parts cost from $ 15 to $ 100 per rotor depending on duty-cycle. They should be replaced in pairs.

When replacing rotors, pads should also be replaced. They are another $ 20-30. Whoever does the job, should also service, clean, grease Caliper bolts, boots. Brake fluid should also be flushed -- use DOT 4 fluid, nothing else. And bled of course (bleeding order Rear-left, Rear-Right, Front-Left, Front-Right).

You should try to buy rotors, pads and DOT4 fluid yourself (FCP Groton) and give them to the shop.

For 2 rear ones, I would expect 2 hours of labor.

Caution:

1- Make sure DOT4 only fluid is used.
2- A power bleeder should be used, and when bleeding do not pump the brake pedal all the way down. It will will ruin the Master Cylinder.

This is a also good time to service and/or repair the parking (emergency) brake.

 

Wow, that's exactly what I needed to know. Thank you, thank you, thank you.

 

Rear brakes on these cars usually last about 90,000 miles. Front brakes, depending on the pads will last about 60,000 miles in my area.

 

When bleeding ABS brakes, is there any pitfalls to lookout for? I use a Motive pressure bleeder.

Thanks

Fred

 

Yes, very important -- Release pressure on the Motive bleeder after each wheel. Pump pedal (not all the way down) 5-8 times. Then move on to the other one.

And of course use the correct sequence.

 

Henry10,

Thanks for the information for this, and all the other times.

Fred