Skip the auto shop - Our mechanics make house calls

Q: All four brakes locking up after being driven for about 45 minutes

asked by on

After driving about could 45 minutes the brakes won't release causing them to get hot. Let it sit and they will release
My car has an automatic transmission.

A: Hi there, if work was recently done on the ...

Hi there, if work was recently done on the master cylinder or brake booster, check to see if the brake push rod (manual or power assisted) has too little free play. If it is too tight, the master cylinder piston could be partially blocking the return port. If the brake fluid reservoir is too full, this can cause hydraulic brake drag. A weak or failed metering valve - a valve intended to keep a small amount of pressure on the front disk brakes only, could be causing a small amount of pressure on all of the brakes temporarily as you are experiencing. I would recommend having an inspection done on your dragging brakes by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Miss firing cutting out rough idling poor acceleration and dies on me

Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

Q: Indicator light comes on saying the electrical has failed

The indicator light may be related to the brake pads needing to be replaced. Your car has what are called brake wear sensor indicators which measure the thickness of the brake pads. When this thickness gets to a specific wear...

Q: Misfire in cylinder number 8.

Hi there. The issue could be the spark plug not firing on cylinder 8, the fuel injector not atomizing on cylinder 8, or there could be a burned valve or a burned head gasket. Check the spark plug on cylinder...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...