New disc brake mystery

Asked by GuruVN2LL Aug 29, 2018 at 09:56 PM about the 1999 Ford F-250 Super Duty XLT Extended Cab LB

Question type: Maintenance & Repair

New disc and brakes grab after truck has sat.  Briefly grab then ok. Why?
1997

1 Answer
42,930

Hornet_2497 answered 5 years ago

I've had that happen and I think moisture makes them grabby until they heat up and dry out. That same moisture could cause a slight gritty coating of rust which would also increase the friction for a moment. Maybe after they break in and get a slight glaze the grabbing will stop.

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