Hi,
Is there any drag from the brakes when the pedal is released? What I have seen happen is this. Brake fluid will expand when it gets hot. As a result, it can apply more and more pressure on the brakes causing them to lock. When you replaced the pads, did you remove all dirt or rust from the caliper mount where the pads sit? They could be frozen in the mount and causing this. Even if the slide pins are loose, the pad can be frozen in place.
Here is a link that shows in general how the procedure is done. Take a look through it to see if anything was missed.
https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors
If you look at the attachments below, they include the directions for removal and replacement and inspection of the rear brakes. These are specific to your vehicle. Take a look through them and see if anything helps.
Something is allowing the pads to hang up. Make sure everything is moving freely including the pads.
Let me know what you find or if you have other questions.
Take care,
Joe
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Thursday, April 15th, 2021 AT 7:13 PM