![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Jun 2003
Location: Estacada, OR
Posts: 37
|
Rear disc brake conversion ?'s
How difficult is it to do the conversion? What is the process, and what parts are needed? I have been giving some thought to this, because I really don't like having to pull the axle and everything out when it comes time to do my rear brakes. Is this a DIY project, or are there some areas where a professional needs to participate in? If someone could give me a semi-detailed list of parts needed and of the process I would appreciate it.
Thanks in advance for any and all info. 2-Knee |
![]() |
![]() |
![]() |
#2 |
Registered User
Join Date: May 2003
Location: Lake Oswego, Oregon
Posts: 1,028
|
ive seen kits for the rear disk conversion through www.P-s-t.com. but what ive seen from horsepower tv, it looks to be like a weekend project.
__________________
Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3 |
![]() |
![]() |
![]() |
#3 |
ROCKET POWER!
Join Date: Feb 2003
Location: Finland, Europe
Posts: 509
|
It depends mostly on what rear end you currently have, there are inherent design limitations with semi-floating rear ends that make disc brake conversions more difficult than with full-floating axles.
In general, you'll need 2 discs, 2 calipers, 2 caliper brackets, 2 new brake lines, 4 brake pads and some mounting hardware. This setup does away with the parking brake (unless you use calipers that have built-in levers for parking brake cable such as Saab 90/99/900 front ones). The problem with GM semi-floating rear ends (eg. 10/12bolt) is that they are designed to have some amount of endplay in the axle shafts. That's due to a C-clip design used to hold the axle shaft in place. Mounting a brake disc on the axle flange means it'll wander in and out a bit constantly, making it difficult to center the caliper with the disc. However the 14-bolt full-floater (do not confuse with the 14-bolt semi) does not rely on the axle shafts to actually mount the brake drum (nor carry the weight of the vehicle) and does away with the c-clip design. This rear end is very easy to convert to disc brakes, several companies make brackets for the calipers. One is Shakerbuilt. I remember their design uses the front discs and calipers off of a 73-77(?) C- 20 pickup in the back, which is great because parts are abundant.
__________________
What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild |
![]() |
![]() |
![]() |
#4 |
www.73-87chevytrucks.com
![]() Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
|
Caddillac Seville's used 12bolts with 5x5 bolt spacing and discs.
TSM makes a kit for 4x4's and there is someone that is having a Group Buy on rear disc setups for the 6 lug on http://www.fullsizechevy.com/forums
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
![]() |
![]() |
![]() |
#5 |
www.loweredd.com
Join Date: Aug 2002
Location: Struble IA
Posts: 808
|
$739 from PST?!?! Wow! Capt, the link didnt work for me.
BellTech started to make kits, but that plan fell through. I hate to see if Baer has anything. |
![]() |
![]() |
![]() |
#6 |
5 day ban, learn to behave.
Join Date: Nov 2002
Location: san diego, ca
Posts: 684
|
77K20 if you're going to do it to your 77K20, let me know.. I did it to my 77 K20 (okay, 77 K25) .. Id be more than happy to give you all the info you need. Its one of the best mods Ive done and Id do it again in a heartbeat. Its really inexpensive, too
mike |
![]() |
![]() |
![]() |
#7 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
|
__________________
Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
![]() |
![]() |
![]() |
#8 | |
Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,550
|
Quote:
I would be much more impressed with a kit that included a cast caliper bracket to get rid of the vibration I sometimes feel and one that doesn't have to have spacers that are easily lost on the lugs. If I wanted to go their route again, I would figure out the calipers to use (I seriously doubt they are that special), buy them and the rotors at the auto parts store and fab the rest myself. I bet I could do it for under $300.
__________________
Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
|
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Jun 2003
Location: Estacada, OR
Posts: 37
|
What is, and how do you tell the difference, between a semi and full floating Corp 14? I am referring to my 77 K20 in this post, and I have the Corp 14, but I don' know if it is semi or full floating, and I don't know how to tell the difference either. What is the difference between the two?
2-Knee |
![]() |
![]() |
![]() |
#10 | |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
|
Quote:
Last edited by N2TRUX; 08-20-2003 at 09:37 AM. |
|
![]() |
![]() |
![]() |
#11 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
|
I don't have any clear shots of just the kit, but here another view...
|
![]() |
![]() |
![]() |
#12 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
|
You are correct about the lines. Now that I think about it, we just bent the new lines to match the old, cut them off, and re-flared them. Now the old bracket works just fine....
![]() |
![]() |
![]() |
![]() |
#13 | |
www.73-87chevytrucks.com
![]() Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
|
Quote:
http://www.fullsizechevy.com/forum/s...threadid=39345 Other places to look... http://ecihotrodbrakes.com/rear_disc...nversions.html http://www.tsmmfg.com/General_Motors...rear_axles.htm ttp://www.binderbulletin.org/faq/1.htm#10 http://www.classicperform.com/tech_a...kes-trucks.htm Normally people use 80-85 Caddy Seville rotors if you want a Parking brake (read EXPENSIVE without a core), and then anywhere from G-body to Pickup calipers. Disc can be the same Caddy if you are building brackets on your own, or 4x4 pickup front rotors (because they are "floating" (non integrated hub, ie they just slip over a hub)
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
|
![]() |
![]() |
![]() |
Bookmarks |
|
|