99xcss4
frank'n (truburban) K-2500
I do not know about 8 lug 2500s because they could be semi float or full float rears but but I think all the 3500s with 350 had 4l80e as the automatic option
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I think the aam 11.5 did not come out until 2001 so no gmt400s got it only gmt800s I do not know if it could be had on the last few years of the c3500hd or not11.5 inch full float axles as options.
Nice restoration! those projects can be a pain but it's nice to have it done right!Greetings SDgunner,
Thanks to purchasing a '99 C2500 with a missing e-brake cable vs. an impending
NY safety inspection, I was forced to open up the quiet & smoothly operating rear
brakes, and discovered a still functional yet sketchy mess traceable to the PO's
benign neglect. (See 1st attachment.)
Given the sheer amount of rust/scale on the exterior surfaces that face the
pumpkin, I was concerned about a possible loss of structural integrity. I
decided to remove the backing plates & ran them through my blast cabinet
in order to be able to prove/disprove to myself that they were still fully
functional. (See 2nd attachment.)
After blasting every square inch of both backing plates, I was impressed
by just how robust GM had made them. Actually confidence-inspiring
enough to reuse them, as opposed to sourcing a minty used set from down
south or possibly lucking into a set of NOS ones.
Once they were strictly clean, I did put the POR-15 to them in order to
help them last as long as possible here deep in the rust belt. (See
the 3rd attachment.)
And finally, the photo right after I pushed this functional resto over the Finish Line.
(See 4th attachment.)
****
That's the thumbnail sketch. If you are interested in the actual blow by blow,
follow the link to the section in my functional restoration thread where
I (unwillingly) dove into a set of perfectly-behaving rear brakes and
found plenty of stuff to make better. (LINK)
The bottom line is that those backing plates on my JD7-equipped C2500
were still strong like new, so in my case the rust turned out to be
cosmetic. But if you can gain access to a blast cabinet, it's worth the
piece of mind to go looking for trouble, not finding any, and putting it
all back together so that it functions like the day it rolled off of the
assembly line.
Safe travels --
Maybge common in the frozen wastelands not so much here. Looks like big chunky scaley flaky layered rust in the video.??? What am I missing?
Looks like every vehicle I've ever seen. Nothin' special about that. Brake tubing looks better than most.
Probably want to replace the leaf-spring on the right side, and inspect the left-side spring thoroughly.
I think the aam 11.5 did not come out until 2001 so no gmt400s got it only gmt800s I do not know if it could be had on the last few years of the c3500hd or not
Maybe pull the backing plates and hit them with a needle scaler again, and slop some phosphoric acid, primer, and paint on them followed up by some Cosmoline or Fluidfilm? If GM doesn't have new plates, I think Dorman does....as much as I hate recommending Dorman parts. I think I'd spray the whole axle with something.
X2 forgot that as well. You can pull the backing plates and dunk them in Coca Cola, Pepsi, Dr. Pepper or any soda with phosphoric acid. I’ve done this in the past with rusty AK parts and it works wonders.
Nice restoration! those projects can be a pain but it's nice to have it done right!