Rear rims are hot

[tlhfirelion]

Hello, 2001 Toyota sequoia 218,000 miles limited edition. I've recently had an issue where my rear right rim is hot when I drive. I've checked the emergency brake and when I looked at the brake pads those were extremely worn down compared to the other three wheels. I had my rotors turned I replaced all the brake pads on the vehicle, and I also had the calipers checked by a Mexhanic friend that was visiting. He did note that the brake line to that rotor was cramped and it did need to be replaced so I did that as well. I have a greased up the caliper pins and I'm about to replace the caliper boots for those pans for the wheel in question. What I think is happening now is that I'm getting excessive heat and an indication of brake dust for both of the back wheels now. I realize that brakes get hot but I would expect the two front rims to be hotter than the two back ones when the reality is that reverse. I don't want to start throwing expensive parts by replacing calipers and brackets and what not, and I don't know if this vehicle has a brake proportioner and if so where that's even located and if that something I can DIY. I have checked the fluid on the master cylinder and it was just slightly over filled so I drained a little bit out to get it exactly to the max line. That had zero effect on the issue. The last thing I checked as a last ditch effort was the abs sensor to see if it was dirty but it was perfectly clean. If anyone has any suggestions as to anything I can do to fix this issue or replace apart I'm all ears cuz I'm at my wits end. Thank you.

 

[tlhfirelion]

Quick update. I just drove 50 miles and after sitting in the sequoia and making some calls, the two back rims were almost too hot to touch. Now I'm concerned if this is safe to drive.