A couple weeks back I had my rear left brake locking up, I had to crawl under and manually back the drums all the way in. I took it to the dealership, they said they bled the system and everything is fine. Today I had my wife driving my 4Runner because her car is at Lexus for repairs. She calls me and says the rear left brake is locking up again.

So what could it be? A wheel cylinder that is not release? Or an auto-adjuster that is doing too much?

It's a 2000 4WD w/ 56k miles, and it's had its rear axle seals replaced already.

 

newer thread from you with dealership suggesting it is the diff and now the tranny

not sure why you did not come back to your own thread

you may want to link them together so others can learn what the real trouble turns out to be

 

my seals went out and a couple months later it needed it again, the wheel bearings i believe were bad which inturn messed up the seals again

 

Just don't use the e-brake.