No back brakes after completing brake job?

Just to be sure, did you replace these parts to try and repair the issue of no rear brakes or did you do all this and now you have no rear brakes?

Also, what happens when you press the brake pedal? Does it go to the floor or is it a firm pedal and you just have no rear brakes?

Lastly, how are you confirming that there are no rear brakes? Are you lifting the rear of the truck and pressing the brake and trying to spin the rear tires? I ask this because it is hard to know for sure if it is both rear wheels or just one.

Depending on the answer to this info, we may go in a different direction but I am thinking we may have a metering valve issue or we just have not bled the brakes enough.

Here is a guide on bleeding the brakes for your review:

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

Let me know about all this info and we can go from there but if this issue just started since replacing these parts, I am thinking the master cylinder is the issue. However, if you have not lifted the rear of the truck and tried to spin each wheel with the brakes pressed, let's do that as well. Thanks

Okay. So soft brakes is understandable because you said earlier that you didn't have rear brakes and that is a rare issue on this truck with no other issue.

So if you have spongy brakes then the common causes of this are air in the lines, brake line swelling, fluid issues, wheel cylinder or caliper issues. Sounds like you crossed all those off the list so I understand the frustration.

The one thing that we haven't covered that would fit into the no rear brake issue is the rear shoes are out of adjustment. Meaning the wheel cylinder is applying the shoes to the drum but they are too far in and there is no pressure. So basically the wheel cylinder runs out of travel and you are not getting any push back on the pedal giving a soft pedal.

Here is a guide that shows how to replace drums and shoes. There a lot of videos embedded that will help with adjusting the shoes. However, the trick to this, is to lift the vehicle, spin the tire and it should spin freely. Then adjust the shoes using the adjuster screw through the backing plate and adjust them until you feel the shoes dragging. then back them off a quarter turn. Then press the brakes and make sure the wheel cannot be spun by hand. Let me know what questions you have.

https://www.2carpros.com/articles/how-to-replace-rear-brake-shoes-and-drums

You did say rear calipers. Sorry I didn’t pick up on that.

At this point you need to remove line from the master cylinder cap the ports and press the pedal. If the master cylinder was bench bled then it should be a hard pedal as it is the only thing in the system if there are no lines. I didn’t mention it but if you didn’t bench bled the master then that is the issue I suspect. You will just push and pull air and not get much pressure.

Assume you have a hard pedal with no lines on the master, add them back on one at a time until it is soft again. Once it’s soft you know what area the problem is in.

If the pedal is soft with no lines on the master it is either air if you didn’t bench bled it or a faulty master cylinder.