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Did you replace the rubber brake lines to the caliper. They can collapse internally and cause this to happen. Also, has anyone replaced the brake light switch recently? Also, the push-rod from the brake booster is adjustable. If that isn't properly adjusted, it can keep a small amount of pressure on the brakes. Keep in mind, as brake fluid gets hot, it expands. So in theory, the hotter the brakes get, the more expansion in the fluid and the more pressure applied to the brakes.
I attached a pic of the hose I am referring to. Let me know if that was done and if this is a problem that existed originally.
Joe
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Friday, March 5th, 2021 AT 11:08 AM