Gm Semi float 14 bolt, trash or rebuild?

[Blackwater]

I don't think I would be losing anything or much of anything switching to disc since I drive a C1500 with a C2500 9.5 SF. Legally, I am only allowed to tow what the truck is rated. I never changed the suspension on it. Eventually I will swap to a AutoFlex air ride system on the rear, which is designed for 3/4 to 1 ton trucks. It will provide a better ride and keep the truck level while towing. Still, Legally, I can only tow or haul what the truck is rated.

I also seen 3/4 ton and 1 ton single wheel trucks with disc in the later models. I don't know if they are bigger or stronger calipers or both.

 

[Supercharged111]

And different master cylinder and more rear bias. They didn't change just the rear to discs, they changed the whole system to make it work.

 

[Blackwater]

And different master cylinder and more rear bias. They didn't change just the rear to discs, they changed the whole system to make it work.

But for a 1/2 ton it shouldn't be too much a difference. I think I already decided long time ago to drop the ides unless something comes up. My biggest issue was the park/emergency brake.

 

[Supercharged111]

You're wrong. Half tons push the least amount of fluid to the rears by a landslide. It will suck donkey balls if you don't address the hydraulics.

 

[joshman]

IMO if cost is a factor, dont go to disc brakes. the braking benefit will be marginal, & fresh brakes work great.

i do confess the whole semi-float vs full float/C vs K is very confusing! i thought semi floats were always 6 lug, but maybe thats only on the K side. i am clueless about C side axles.

the post above pointing out hydaulics is definitely a factor. when i inquired with my mechanic in going to discs he said i would need new master cylinder & maybe brake lines. no way jose!

good luck

 

[Blackwater]

C1500 has 5 lugs, K1500 has 6 lugs, C2500LD has 6 lugs, K2500 has 6 lugs, C2500HD has 8 Lugs, K2500 has 8 lugs, c/k 3500 has 8 lugs.

You're wrong. Half tons push the least amount of fluid to the rears by a landslide. It will suck donkey balls if you don't address the hydraulics.

Correction. looking up the parts, I see that the C/K 1500 and the C/K 2500LD share the Identical brake components except the drum size and shoe size. C/K 2500HD and C/K 3500 share the same brake components.

 

[Supercharged111]

I'm aware of that. They have the same ****** master with bigger drum brakes. What's your point? Mine was that your truck has the ********* master just like mine.

 

[Blackwater]

Do you have an alternate part that you recommend?

 

[Supercharged111]

GMT 800 master had a single bore size like the 8600GVWR+ GMT400 trucks. Either of those are a good starting point. In the end, you may be better off ditching factory proportioning altogether and running adjustable out back. Not sure how attached to the ABS you are. I forget if you are TBI or Vortec. TBI has a rear prop valve that's easily discarded. Vortec I believe does its proportioning inside the ABS pump.

 

[Blackwater]

My signature shows 1993. anyhoo I feel that this thread has been jacked for 14 bolt brakes.