yea.. u may just have air in the lines or its the master cylinder...

 

get underneath the rear of your truck, and look at the bottom of the back tires... see if they're wet... if they're wet, then your rear brake cylinders are leaking and need replaced...

 

i just checked the rear brakes and they are dry...

 

Whoa, Whoa! Calm down buddy. ( Sorry, when people tell me to calm down that is usually the last thing I do)
But anyway, you said " you opened the bleeders and pumped the pedal" if that is right that is not good. Pump first then open, when pedal drops close bleeder.

Anyway, try just opening both bleeders at once and just letting gravity do the work. Keep an eye on the MC to keep it from draining. If you drained the MC while you put the calipers on you will need to rebleed that. There may be a good chance the MC is now shot if you drained it or maybe it was just old.

You can bleed all 4 wheels by just opening them all and keeping the MC filled. Take the cap off the MC while doing this. You may have sucked some air into the rears. Open all bleeders and let it flow for a good long time.

 

i always bleed mine with hose on the bleeder and the other end in a jar of fluid so you dont need another person.

 

lets go back to the basics.... rear drum brakes control the pedal firmness/height
if your rear shoes are good, are the adjusted properly if they are not adjusted up to drag on the drums, you will be able to push the master to the floor. just my 2 cents....

 

Geese! You'd think "Google" was some kind of insult! It's a Cornucopia of detailed information, and no offense to the forum guy's but I think it's a great resource for learning the correct method of Brake bleeding, step by step, including why each step is necessary (including pictures). 1 man method, 2 man method, hell there's a 3 man method where 2 guys bleed & 1 guy keeps the beer coming! Here's an example:http://auto.howstuffworks.com/auto-p...e-bleeding.htm that being said, this isn't funny? "I'll see if I can do the rear and I'm doing it with 2 people" Sure, he took it out of context, but it's still funny. And nobody thinks your "Going to San Fransisco with a flower in your hair!" Your a FORD man!

 

I just did a whole brake job on my 89 calipers, rotars, pads, rubber brake lines, one hard line.

Took me a while and 2 big bottles of brake fluid to get all the air out of the lines. Just start with the right rear--->left rear--->right front--->left front.

If ur still havin probs like all the other guys said, probably the master cyl, had to replace one on my ranger.

 

You said you opened the lines. You did use the bleeders, right? You won't get all the air out if you are loosening the line instead of the bleeder screw.

 

I looked all over in the manual but never could find the proper 3 man method, thanks.