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I had this problem on my 940. It started as a slight shudder when I braked, and then there was an intermittent clunk. Then, without any warning, both of the front brakes fell off (Completely. They were dangling by their cables!). It turns out that the bolts holding the brake system on had vibrated themselves out. Try tightening the bolts and see if that helps.

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Q: What causes problem when 1991 Volvo 940 abs tries to come on at low speed only causing a shudder on pedal and a clunk noise not caliper not disc not hose?
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