2005-6 Silverado SS Why disc to drums rear-end? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gus · 05-13-2008, 08:17 PM

does anyone knows why GM changed the rear-end with disc brakes to drums?
Are those posi-rearends?

jsbgump · 05-13-2008, 08:56 PM

I believe they were having problems with the calipers. I have an 06 GMC CC and it has the drum with the limited slip differential

gus · 05-13-2008, 09:28 PM

I got the 06 SS and it also has the rear drums !

fun in dirt · 05-15-2008, 12:14 AM

Good question, was wondering that too? Just noticed it on our new '08. It also has a posi (2wd, Z71)

04 orange · 05-15-2008, 05:20 AM

Because they where having problems with the parking brake shoes. On the 99-04 the rear rotors are a top hat design with the parking brake on the inside of the rotor. They redesigned the clip that holds the shoe up and that was supposed to fix the problem but it didn't, it just made the shoes last a little longer. So in 05 they went back to what worked for them.

68GMCCustom · 05-15-2008, 05:39 AM

Had an '01 Sierra C3 (1st Denali truck) and it had the rear discs with the POS "drum in hat" e-brakes....and were rebuilt/upgraded but still didn't work worth a darn.

Pyrotechnic · 05-16-2008, 09:25 PM

Yeah my dad had issues with the rear disc parking brakes on his 02. To me though, it seems like from 99-02, to 03-06, there was A LOT of cost cutting changes too.

jasonb72 · 05-22-2008, 07:51 AM

Talked with my New truck manager, he said GM was having a lot of complaints in regards to towing and brake failure.

05-13-2008, 08:17 PM	#1
gus Registered User Join Date: Dec 2006 Location: Orange County Posts: 163	2005-6 Silverado SS Why disc to drums rear-end? does anyone knows why GM changed the rear-end with disc brakes to drums? Are those posi-rearends?

05-13-2008, 08:56 PM	#2
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: 2005-6 Silverado SS Why disc to drums rear-end? I believe they were having problems with the calipers. I have an 06 GMC CC and it has the drum with the limited slip differential __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

05-13-2008, 09:28 PM	#3
gus Registered User Join Date: Dec 2006 Location: Orange County Posts: 163	Re: 2005-6 Silverado SS Why disc to drums rear-end? I got the 06 SS and it also has the rear drums !

05-15-2008, 12:14 AM	#4
fun in dirt Registered User Join Date: Jan 2007 Location: Mississippi Posts: 2,122	Re: 2005-6 Silverado SS Why disc to drums rear-end? Good question, was wondering that too? Just noticed it on our new '08. It also has a posi (2wd, Z71) __________________ '72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432 '85 K30 "Big Nassy" [B]'85 C10 [B] "Corpse" '01 2500 Suburban ...party wagon & tow truck '06 Silverado SS...DD '06 C1500 WT...DD '07 Classic C1500 WT...DD Built & sold cause can't keep 'em all: '72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190 '55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938 '69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541 '86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619

05-15-2008, 05:20 AM	#5
04 orange Registered User Join Date: Sep 2006 Location: Midlothian, Tx Posts: 144	Re: 2005-6 Silverado SS Why disc to drums rear-end? Because they where having problems with the parking brake shoes. On the 99-04 the rear rotors are a top hat design with the parking brake on the inside of the rotor. They redesigned the clip that holds the shoe up and that was supposed to fix the problem but it didn't, it just made the shoes last a little longer. So in 05 they went back to what worked for them.

05-15-2008, 05:39 AM	#6
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: 2005-6 Silverado SS Why disc to drums rear-end? Had an '01 Sierra C3 (1st Denali truck) and it had the rear discs with the POS "drum in hat" e-brakes....and were rebuilt/upgraded but still didn't work worth a darn. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

05-16-2008, 09:25 PM	#7
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: 2005-6 Silverado SS Why disc to drums rear-end? Yeah my dad had issues with the rear disc parking brakes on his 02. To me though, it seems like from 99-02, to 03-06, there was A LOT of cost cutting changes too.

05-22-2008, 07:51 AM	#8
jasonb72 PorterBuilt Man Crush Join Date: Jul 2007 Location: Allen, tx Posts: 291	Re: 2005-6 Silverado SS Why disc to drums rear-end? Talked with my New truck manager, he said GM was having a lot of complaints in regards to towing and brake failure. __________________ The 72 will live again

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