Rear brake upgrade: 11" to 13"
Yeah I know, most people with these old GM trucks are busy jumping through their very own pie hole junking rear drum brakes in favor of rear disk brakes but I don't totally buy into the rear disk swaps especially when using the problematic El Dorado calipers combined with the small front brake rotors mounted to the rear axle. I hated working on El Dorado calipers when they were on El Dorados let alone to bolt those turds on my toy. No way! The late model GMT800 rear disk component swaps to these old trucks are worthwhile but the parts are too pricy.
Anyway, how this project came to be is due to the fact that I finally had to make a tough decision to
scrap my dad's K20 wrecker . I plan to use the 4:10 ratio axles (D44 front & 14 bolt full-floater rear) from the wrecker in my
Polar Bear Suburban but the wrecker had 13” rear brakes. My heavy K10 with little 11" brakes could benefit more from the larger 13” brakes than the Suburban so I renewed everything on the 13” brake system and swapped them over to the K10 last night. WOW! With the combination of the hydroboost that I swapped on a couple years ago along with these 13” brakes the big heavy truck stop on a dime now and gives back 8 cents change! The dang park brake finally works now too. Actually, it feels like it stops better than my stock Silverado HD with rear disks.
On with the pictures…
Off with the little 11”s
Check out the difference when the 11's are laid next to the 13's. I installed the new shoes, hardware and e-brake cable on the 13” backing plates last night so it make the job quick and easy today. That 13” drum is a heavy ********!
The big 13” drums stick out much further behind the wheel
Rear view of the 11's before tear down
Now I have to get to work on rebuilding these 11" brakes and finish getting the D44 front axle ready for the
Polar Bear.