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#1 |
Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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70 3/4 ton 4 x 4 drum to disk question
Has anyone converted a 3/4 ton 8 lug Chevy 4 x 4 front drum to disk? Reason I'm asking is I looked at one site and it looked like All was needed was the backing plate, calipers and it looked like the rotors slipped on just like the drums currently do. It almost seemed too easy unless I am missing something.
Thanks! Frank
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1970 K-5 4X4 Blazer ![]() 1970 K-20 4X4 Long Bed ![]() "Liberty Means Responsibility, that is why most men dread it" |
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#2 |
Registered User
![]() Join Date: May 2007
Location: Deale Md
Posts: 4,663
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Re: 70 3/4 ton 4 x 4 drum to disk question
Is you rear a open or closed knuckle
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James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change! |
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#3 |
Registered User
Join Date: Sep 2007
Location: West Coast FL
Posts: 204
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Re: 70 3/4 ton 4 x 4 drum to disk question
good question; i've been wanting to ask myself too; you just beat me to it... i have a closed knuckle front end. here's a pic of the knuckle and the hub.
thanks, ww
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1970 Chevy K20 Custom Camper 1996 Chevy Impala SS 2008 Chevy Avalanche LT3 2003 Honda Accord EX 2001 Hewes Redfisher 16 Fighting Lady Yellow Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=324118 |
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#4 |
Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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Re: 70 3/4 ton 4 x 4 drum to disk question
Its the bone stock open knuckle dana 44. I'd bet the only difference between the 1/2 ton version & the 3/4 ton version are the hubs! lol
Frank
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1970 K-5 4X4 Blazer ![]() 1970 K-20 4X4 Long Bed ![]() "Liberty Means Responsibility, that is why most men dread it" Last edited by Old Chevy Mech; 11-01-2007 at 06:51 AM. |
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#5 |
Overdrive club
Join Date: Sep 2007
Location: apache junction, arizona
Posts: 819
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Re: 70 3/4 ton 4 x 4 drum to disk question
I tried putting disc brakes on my 69 closed knuckle axle,they will bolt on but the inner axle will need some machining to make it work!!!!!!I found it easier to buy a set of axles from a 72 and bolt them in!!!!!!!
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1971 c-10 1951 3100 chevy 1970 chevy c-30 Sold! |
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#6 |
Senior Member
Join Date: Dec 2003
Location: Kingsport TN
Posts: 4,641
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Re: 70 3/4 ton 4 x 4 drum to disk question
If you have the 70 open knuckle axle you will need from the knuckles out for the convertion. if you have the closed knuckle axle like in the pic above the only cost effective way is to just get an axle from a newer truck and swap it in.
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Earl 68 2500 4x4 GMC Burb |
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#7 |
Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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Re: 70 3/4 ton 4 x 4 drum to disk question
Earl,
Do you mean that the knuckles have to be replaced? I went to Blackbirds Custom Trucks site and it looked to me as though it was pretty simple (depending on your level of pain, mine is pretty high) Frank
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1970 K-5 4X4 Blazer ![]() 1970 K-20 4X4 Long Bed ![]() "Liberty Means Responsibility, that is why most men dread it" |
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#8 |
Registered User
Join Date: Apr 2000
Location: Chester County PA, USA
Posts: 1,228
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Re: 70 3/4 ton 4 x 4 drum to disk question
The bolt circle that the spindle bolts to on a drum brake knuckle, is clocked differantly than a disc brake knuckle. These bolts also hold the disc brake caliper mount on. So if you have a open knuckle d44 disc brake axle, swap everything from the knuckles out, onto your drum brake axle.
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72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania |
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#9 | |
Senior Member
Join Date: Dec 2003
Location: Kingsport TN
Posts: 4,641
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Re: 70 3/4 ton 4 x 4 drum to disk question
Quote:
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Earl 68 2500 4x4 GMC Burb Last edited by earl87gta; 11-01-2007 at 01:06 PM. |
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#10 |
Keepin it runnin!
Join Date: Oct 2007
Location: Deep River, CT
Posts: 1,036
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Re: 70 3/4 ton 4 x 4 drum to disk question
Here is the hub.
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1970 K-5 4X4 Blazer ![]() 1970 K-20 4X4 Long Bed ![]() "Liberty Means Responsibility, that is why most men dread it" Last edited by Old Chevy Mech; 11-28-2007 at 07:24 AM. |
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