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#1 |
Registered User
Join Date: Feb 2007
Location: Atlanta
Posts: 51
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1970 C20 8-lug brakes
I have a 1970 CST/20 with 8-lug 10 bolt and need to redo the back brakes. Need some how-to knowledge on this topic. Specifically on how to take it apart, looks like I need a large spline socket to get the axle out to get the drum out. But this is only a guess. If I am right, where do I get this socket?
Last edited by olyeller70; 04-05-2007 at 07:32 AM. |
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#2 |
Registered User
![]() Join Date: Oct 2006
Location: Southern Kalifornia
Posts: 3,066
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Re: 1970 C20 8-lug brakes
It should have 2 screws holding the drum onto the axle. Remve those screws. now there will be another set of threaded holes in the drum, inset the screws or same thread bolts,into each of the threaded holes and begin to tighted the bolts. It will remove the drum. I know this to true for a Dana 60, but not too sure about an Eaton rear. Hope this helps.
-Lance
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------------------------------------------------------ -Lance 2000 Chevy C2500, 5.7, 4L80e 1999 Suburban K2500, 7.4, 4L80e 1980 Camaro..son's car...PROJECT |
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#3 |
Registered User
Join Date: Feb 2007
Location: Atlanta
Posts: 51
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Re: 1970 C20 8-lug brakes
Took some pics tonight. Did some more looking, not a DANA since it has a round cover, no screws at the drum, removed some of the 8 bolts on hte axle and out came the juice. So with that said what is it and how do I do this brake job. And what juice do I put back in when done.
Thanks, Mike |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: 1970 C20 8-lug brakes
you need a special socket. I know snap on has there budget line (blue point) one for 60 bucks... I just got one 2 weeks ago... but I'm sure NAPA would have one cheaper.
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#5 |
Chevy Forever
Join Date: Jun 2005
Location: Dalzell SC
Posts: 314
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Re: 1970 C20 8-lug brakes
Also so you know that is a Eaton rear end and brake parts will be hard to come by just my .02 I figure when it comes time to do my brake I will convert to disks in the rear.
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My first love 1971 C20 Hugger orange Getting face lift and heart transplant .30 402 BB /TH400 and GV Wifes car 1969 Chevelle SS 396 325hp/TH400 Factroy A/C Automatic w/ Floor shift console. restored. |
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#6 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: 1970 C20 8-lug brakes
If you need parts or a complete rear end, let me know I have one. I may be coming that way this next weekend.
R
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#7 |
Registered User
Join Date: Mar 2007
Location: Oregon
Posts: 109
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Re: 1970 C20 8-lug brakes
When you pull the axle shafts out there will a large nut, a washer and another nut holding the outer bearing in. You can loosen them by tapping them with a hammer and a punch ( or chisel), on the corners of the nut. I know this is an old timers trick and not the factory approved way to do it but it works. You can reinstall them in the same manner.
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#8 |
Registered User
Join Date: Jan 2007
Location: IOWA
Posts: 58
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Re: 1970 C20 8-lug brakes
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![]() - 1972 350 ENGINE - MUNCIE SM 420 - 4.56 GEARS |
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#9 |
Scrapper 1
Join Date: Jan 2007
Location: Riverside Calif
Posts: 1,649
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One thing to remmber when doing your 1/2--1 ton rear ends which i had to learn the hard way and after i fixed it man the rear breakes work so much better
remmber to put that brake shoe Lube on the backing plate reason if you don't some time down the road it will leave a wear marke and the brakes will stick or wont ajust and you will one day not stop or have one that stops or just plain Locks up if you olready have these groves sand it down take a wire feed fill it in and grind it smooth and your back in business this truck of mine did over 100 rear brake jobs in 5 years cus of that Problem i converted mine to disc brakes and it works grate 16 years of nothing but hard work same rear end as most of the ones on the newer chevys |
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#10 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: 1970 C20 8-lug brakes
all depends on what he has hidden in the drums, what he needs... I have one of the best NAPA guys in the state, and it took forever to get the right parts. (granted, mine is a SRW C/30)
as far as tapping the nut off... how do you guys torque it down afterwards? |
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#11 |
Junior Member
![]() Join Date: Jul 2005
Location: Wisconsin
Posts: 151
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Re: 1970 C20 8-lug brakes
I am thinking that I may have to do brake work to my C30 camper, is the disk conversion pricey? thanks
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'71 C10, Choptop/Lowered '70 C30, w/24' Franklin Motor '91 9c1 Caprice '90 Harley FL, 127 Ultima engine w/6 speed, Blk & chrome |
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#12 |
Registered User
Join Date: Feb 2007
Location: Atlanta
Posts: 51
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Re: 1970 C20 8-lug brakes
Thanks everyone. I priced the parts at Advance Auto parts Saturday and it came to about $280 drums, pads, rebuild kit, and whl cyl. Will check NAPA on Monday and also locate that mysterious socket. Thanks Hartrod, as for the parts I have an extra rear chunk tucked away in a safe place for a rainy day. Does anyone have a part number for that mystery socket.
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#13 |
Registered User
Join Date: Oct 2005
Location: ILL.
Posts: 129
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Re: 1970 C20 8-lug brakes
Take you nuts in with you if you get them off but do use a socket to put them back on. PLEASE
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#14 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: 1970 C20 8-lug brakes
buy all the parts, then match them up after pulling the drum off, odds are, you'll be taking some parts back due to not being right.
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#15 |
Registered User
Join Date: Feb 2007
Location: Atlanta
Posts: 51
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Re: 1970 C20 8-lug brakes
Any part numbers for that mystery socket. Also are there any surprise gaskets or parts I will need?
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#16 |
Junior Member
Join Date: Mar 2007
Location: eminence, ky
Posts: 25
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Re: 1970 C20 8-lug brakes
advancedauto carries the socket you need.tell them you need a 6 prong socket to remove the wheel bearing nut on a 3/4 ton chevy rearend. I used the same socket on a 74 3/4 ton 14 bolt rearend and on a 67 3/4 ton eaton rearend
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#17 |
Registered User
Join Date: Feb 2007
Location: Atlanta
Posts: 51
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Re: 1970 C20 8-lug brakes
to Longhorn Man or Steven 03:
Do either of you have the correct part numbers for some of the stuff I need. to All: I will post pics and text when I do this project |
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#18 |
Junior Member
Join Date: Mar 2007
Location: eminence, ky
Posts: 25
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Re: 1970 C20 8-lug brakes
my67 rearend might be different from yours. mine has 2" by12 " brakes on it.I know napa has the wheel cylinders and the shoes for mine and lmc has the drums for about 130. Are your drums finned or smooth like mine?
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#19 |
Registered User
Join Date: Feb 2007
Location: Atlanta
Posts: 51
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Re: 1970 C20 8-lug brakes
Drums are 2x12 smooth. Think I had price of $120 from Advance, worried about the right parts inside. Would like this project to take2 days not 2 weeks.
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#20 |
Registered User
Join Date: Apr 2007
Location: muskogee, ok
Posts: 32
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Re: 1970 C20 8-lug brakes
Okay, here goes...
I got the socket from Oreillys for $38. I've read on another thread that putting it back together, you should torque to 30-40 ft/lbs, then back it off to align the tabs on the washer to the keyway in the axle housing. The mistake I made on my H052 Eaton was, I didn't have the socket, and when I replaced the bearings and races (I figured, what the heck, I have it apart, right?) not torquing the bearings back in doesn't seat the race against the retaining clip, the outer bearings will scrub the hub (read: destroy bearings). I've been cleaning parts and waiting on the machine shop to get my housing back to me. Look me up if you have any questions as it goes back together hootlube@yahoo.com |
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