First time doing drum brakes

[Chase1990C1500]

Hi all, it's time for me to replace the rear brakes on my pickup (1990 C1500, 5.0/th400). The problem is that the configuration isn't anything I can find pictures of online or my Haynes manual. To me, it looks like mine are missing a spring or two at the bottom, but there weren't any broken pieces in there. For what it's worth, I didn't notice any issues with them until I parked it for a few days, and now the back left (pictured) is hanging up and causing shaking.
Does anyone recognize this style, and are they configured correctly? Except the leading shoe that's worn down to the metal lol.
I didn't measure when I had it off, but I believe they're 10" drums. 10 bolt rear end, and has HD discs on the front.

 

[Das Hatt]

Yep, that's a standard configuration for the 10 inch drums. You're right you are missing a spring on the bottom that hooks into the two holes on the shoes and goes underneath the double riveted centerpiece.

 

[Schurkey]

The horrible 254mm (10") leading-trailing shoe drums, made worse by being attached to the weakass 8.5" "10 bolt" ring gear axle.

Complete service procedures are in the service manual set you should download from the links posted in the Sticky thread section of the Engine forum.

The front shoe gets 80% of the wear. Fookin' junk that should never have been installed on our trucks.

Best thing you can do is to find a 6-lug C2500 axle of the 9.5" ring gear design (14 bolt cover, semi-float axle shafts) of the correct axle ratio, and swap the entire axle with the bigger/better 11.x Duo-Servo rear drum brakes. HUGE upgrade for both the brakes and the differential. Downside is that you'd be using 6-lug wheels on the rear, or playing games with aftermarket axle shafts to keep the 5-lug wheels.

 

[Chase1990C1500]

The horrible 254mm (10") leading-trailing shoe drums, made worse by being attached to the weakass 8.5" "10 bolt" ring gear axle.

Complete service procedures are in the service manual set you should download from the links posted in the Sticky thread section of the Engine forum.

The front shoe gets 80% of the wear. Fookin' junk that should never have been installed on our trucks.

Best thing you can do is to find a 6-lug C2500 axle of the 9.5" ring gear design (14 bolt cover, semi-float axle shafts) of the correct axle ratio, and swap the entire axle with the bigger/better 11.x Duo-Servo rear drum brakes. HUGE upgrade for both the brakes and the differential. Downside is that you'd be using 6-lug wheels on the rear, or playing games with aftermarket axle shafts to keep the 5-lug wheels.

I checked out the service manual section, pretty sure I got the right one.
This is the work truck, not the work-on-it truck, so while I'd like to swap axles out for a 6lug (and more rim availability), and a fresh 5.7, it's probably not going to happen to this one. Have to get another one. One to work on, one to drive lol.

 

[Erik the Awful]

You have good pics to work with there. Note the sizes and shapes of the springs and disassemble. Adjust the star wheel in. Slap the new shoes on and put the new springs in (plus the missing one). Once you have it all assembled, work that star wheel out until the drum is a good fit.

 

[Schurkey]

...and consider a fresh wheel cylinder or two.

Make absolutely sure the park brake works. Use it frequently.

 

[Chase1990C1500]

I'm 99.43725% sure the parking brake either doesn't work at all, or wouldn't release. Too scared to try it, not many hills around me anyway.

 

[Chase1990C1500]

You must be registered for see images attach

Fixing the brakes didn't fix the problem, so went on down the line, differential felt fine, probably a bit too sloppy, but whatever. Pulled the driveshaft and found this, pretty sure it doesn't meet OE spec anymore. A new set of universal bearings seems to have resolved the issue, no more squeaking or shaking.

 

[tsr2185]

Were you only experiencing shaking at a certain speed? My drums were bad warped and shook at all speeds. Changed it all out last week and now it only shakes around 40mph when braking. I didnt think to suspect the u-joints and wont get back to my truck for another 2 weeks...

 

[Schurkey]

I'm 99.43725% sure the parking brake either doesn't work at all, or wouldn't release. Too scared to try it, not many hills around me anyway.

Fine. You HAVE to get the park brake working, and you HAVE to use it regularly, or the crappy leading-trailing shoe brakes won't stay in adjustment.