Originally Posted by finalcutjoe
brakes weren't making noise at prep/delivery- but did seem to have a delayed response...
2 hr drive home... backing up parking... brakes sound like an upright vacuum cleaner... maybe louder even, over the noise of the 496 big block
The actibrake will make some noise, after all it is a substantial electric motor and a high pressure pump. Typically, you can not hear it inside the truck while towing, but you can hear it from the outside of the trailer.
If it is louder than a hum, then there might be something wrong with the pump.