8 lug disc brakes? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Aunt-Jemima · 06-26-2009, 01:59 PM

Why doesn't anyone make a 8 lug disc brake kit. I dont really see any reason why not besides maybe strength. but new trucks do and there isnt that much load on the front end besides maybe steering side load? But even that wouldnt be anything to worry about

Aunt-Jemima · 06-26-2009, 03:56 PM

anyone have discs on their 3/4 ton?

Longhorn Man · 06-26-2009, 04:03 PM

not enough people building them up.
You can swap the front end parts off any 71 - 87 3/4 ton and then install new parts. Not real hard.

Aunt-Jemima · 06-26-2009, 04:09 PM

What do you mean by parts? can i just do knuckles of do i have to go a-arms and everything?

justcuz · 06-26-2009, 07:24 PM

If you are going from 3/4 ton drum to disc, you should be able to get by with a spindle, caliper, rotor swap. You may need the tie rod ends out at the spindle too. If you are converting a 1/2 ton you are gonna need the lower control arms and tie rod ends for sure. The 3/4 tons have bigger lower ball joints.

Aunt-Jemima · 06-26-2009, 07:26 PM

oops yeah i ment spindle not knuckle

danw210 · 06-26-2009, 08:41 PM

Brothers has the conversion kit (#DBC8L20). It comes with spindles, tie-rods, ball joints, rotors, calipers, everything you need for $999.

Tx Firefighter · 06-26-2009, 09:32 PM

Goodnight, 999 dollars for 8 lug disc brakes. I tried to give away a set last year. No takers. Every 3/4 ton from 71-87 will work as a bolt in donor. Even if you pay a couple of hundred for the donor parts and then go crazy at the parts store rebuilding everything with all new parts, you will still be under half that price.

Beefcake · 06-26-2009, 09:45 PM

wow... i feel special right now. my 8 lugger has front disk.

danw210 · 06-26-2009, 10:59 PM

Quote:

Originally Posted by Beefcake

wow... i feel special right now. my 8 lugger has front disk.

Special as in different???

I'm right there with ya bud!

Longhorn Man · 06-26-2009, 11:09 PM

Quote:

Originally Posted by Beefcake

wow... i feel special right now. my 8 lugger has front disk.

is it all that special? Every one built since late summer of 1970 has them.

Aunt-Jemima · 06-26-2009, 11:12 PM

Hm. i might be searching some junkyards for some parts then

ERASER5 · 06-27-2009, 03:03 AM

Quote:

Originally Posted by Tx Firefighter

Goodnight, 999 dollars for 8 lug disc brakes. I tried to give away a set last year. No takers. Every 3/4 ton from 71-87 will work as a bolt in donor. Even if you pay a couple of hundred for the donor parts and then go crazy at the parts store rebuilding everything with all new parts, you will still be under half that price.

I have to disagree. I have $900+ in my disc swap using donor A-arms, spindles and drag links. I put in new everything else. I kept the track of all costs. Now if you used the old unknown junk yard parts, you can save money today, but pay it later.

**special-K** · 06-27-2009, 05:05 AM

Quote:

Originally Posted by Aunt-Jemima

oops yeah i ment spindle not knuckle

No,you meant knuckle

.The spindle is part of the knuckle and you need the whole thing.They aren`t seperable.

I can`t imagine having $900 into new bearings,seals,rotors,calipers(rebuilt),ball joints,tie rod ends,and used knuckles/backing plates.And,it`s more likely to find used assemblies that are good to go than needs everything replaced.Other than calipers,it`s not unusual to get 100,000 miles or so out of the wear parts.It`s as likely the parts were recently replaced before the owner gave up on the truck or wrecked it.My last C/20 went down with all those parts fairly new.I see alot of members here swapping to 1/2t wanting to off their assemblies.There`s certainly no reason to blow nearly a grand on a Brothers "kit".

justcuz · 06-27-2009, 02:41 PM

Technically Special K is right.
I refer to a 2wd as a spindle because it is a given today that they are cast together. Some disc brake AMC stuff seperates.
In a 4wd the spindle and knuckle are seperate pieces and do come apart. (except in some 4wd's that do not have a spindle at all, just a unit bearing and a knuckle.)
I don't think there is any confusion now though!

hicktownhotrodder · 06-27-2009, 09:28 PM

reman calipers are $20 at napa

06-26-2009, 01:59 PM	#1
Aunt-Jemima Registered User Join Date: Aug 2008 Location: Des Moines, IOWA Posts: 109	8 lug disc brakes? Why doesn't anyone make a 8 lug disc brake kit. I dont really see any reason why not besides maybe strength. but new trucks do and there isnt that much load on the front end besides maybe steering side load? But even that wouldnt be anything to worry about __________________ 1969 c20 350/th350(shift kit) A/C cab custom headers and exhaust 1972 c10 307/th350 (wrecked) possibly selling

06-26-2009, 03:56 PM	#2
Aunt-Jemima Registered User Join Date: Aug 2008 Location: Des Moines, IOWA Posts: 109	Re: 8 lug disc brakes? anyone have discs on their 3/4 ton? __________________ 1969 c20 350/th350(shift kit) A/C cab custom headers and exhaust 1972 c10 307/th350 (wrecked) possibly selling

06-26-2009, 04:03 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 8 lug disc brakes? not enough people building them up. You can swap the front end parts off any 71 - 87 3/4 ton and then install new parts. Not real hard.

06-26-2009, 04:09 PM	#4
Aunt-Jemima Registered User Join Date: Aug 2008 Location: Des Moines, IOWA Posts: 109	Re: 8 lug disc brakes? What do you mean by parts? can i just do knuckles of do i have to go a-arms and everything? __________________ 1969 c20 350/th350(shift kit) A/C cab custom headers and exhaust 1972 c10 307/th350 (wrecked) possibly selling

06-26-2009, 07:24 PM	#5
justcuz Registered User Join Date: May 2008 Location: Alta Loma, Ca. Posts: 930	Re: 8 lug disc brakes? If you are going from 3/4 ton drum to disc, you should be able to get by with a spindle, caliper, rotor swap. You may need the tie rod ends out at the spindle too. If you are converting a 1/2 ton you are gonna need the lower control arms and tie rod ends for sure. The 3/4 tons have bigger lower ball joints.

06-26-2009, 07:26 PM	#6
Aunt-Jemima Registered User Join Date: Aug 2008 Location: Des Moines, IOWA Posts: 109	Re: 8 lug disc brakes? oops yeah i ment spindle not knuckle __________________ 1969 c20 350/th350(shift kit) A/C cab custom headers and exhaust 1972 c10 307/th350 (wrecked) possibly selling

06-26-2009, 08:41 PM	#7
danw210 69 K20 Join Date: Mar 2009 Location: Elizabethtown, KY Posts: 426	Re: 8 lug disc brakes? Brothers has the conversion kit (#DBC8L20). It comes with spindles, tie-rods, ball joints, rotors, calipers, everything you need for $999.

06-26-2009, 09:32 PM	#8
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 8 lug disc brakes? Goodnight, 999 dollars for 8 lug disc brakes. I tried to give away a set last year. No takers. Every 3/4 ton from 71-87 will work as a bolt in donor. Even if you pay a couple of hundred for the donor parts and then go crazy at the parts store rebuilding everything with all new parts, you will still be under half that price. __________________ I'm on the Instagram- @Gearhead_Kevin

06-26-2009, 09:45 PM	#9
Beefcake Registered User Join Date: Mar 2003 Location: Motor City Posts: 540	Re: 8 lug disc brakes? wow... i feel special right now. my 8 lugger has front disk. __________________ 72 GMC Camper Special 2500. currently has 350/350/14 bolt. 383 and 400 tranny is in the works.

06-26-2009, 11:12 PM	#12
Aunt-Jemima Registered User Join Date: Aug 2008 Location: Des Moines, IOWA Posts: 109	Re: 8 lug disc brakes? Hm. i might be searching some junkyards for some parts then __________________ 1969 c20 350/th350(shift kit) A/C cab custom headers and exhaust 1972 c10 307/th350 (wrecked) possibly selling

06-27-2009, 02:41 PM	#15
justcuz Registered User Join Date: May 2008 Location: Alta Loma, Ca. Posts: 930	Re: 8 lug disc brakes? Technically Special K is right. I refer to a 2wd as a spindle because it is a given today that they are cast together. Some disc brake AMC stuff seperates. In a 4wd the spindle and knuckle are seperate pieces and do come apart. (except in some 4wd's that do not have a spindle at all, just a unit bearing and a knuckle.) I don't think there is any confusion now though!

06-27-2009, 09:28 PM	#16
hicktownhotrodder Rollin Coal Join Date: May 2009 Location: Winnebago Illinios Posts: 131	Re: 8 lug disc brakes? reman calipers are $20 at napa __________________ I have three letters to all these import guys: God-Made-Chevy 04 GMC Sierra 2500HD Duramax 1972 Chevrolet C-30 Dually Pickup stock? 350 SM465 four speed 1977 GMC K-35, TH-400, 4X4 450 horse 454(dad's) 1993 Dodge cummins 5-speed DEAD!!

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