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#1 |
Registered User
Join Date: Dec 2005
Location: nebraska
Posts: 136
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rear disc brakes on 3/4 ton and posi?
what will work for a conversion on a 3/4 ton 8 bolt rear end in a 71 4x4? what posi will work for 4.10 gears? thanks
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#2 |
Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,052
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Re: rear disc brakes on 3/4 ton and posi?
Blackbird customs has a disk brake kit
__________________
1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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#3 |
Registered User
Join Date: Dec 2005
Location: nebraska
Posts: 136
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Re: rear disc brakes on 3/4 ton and posi?
bump, still need info on the posi??
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#4 |
Registered User
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
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Re: rear disc brakes on 3/4 ton and posi?
I would look at the Powertrax by Richmond Gear pretty easy to install and and works well on the highway http://www.richmondgear.com/powertrax/lockright.html
__________________
69 Chevy 4x4 383 Power ![]() |
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#5 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Hey there,
you got the d 60 with the 7 bolt backing plates? is it 8 lug hubs? I am working with a machinist friend of mine to adapt dodge d3500 rear discs to my 3/4 full floater axle as we speak. we are in the beginning stages so will post some more when I get it trial fitted together which should be in next few weeks. Sean plano texas
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#6 |
Registered User
Join Date: May 2009
Location: Eliot, Maine
Posts: 1,314
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Re: rear disc brakes on 3/4 ton and posi?
adapting the dodge brakes for the dana 60 sounds like a good idea.
i'd use a factory 2000+ GM 8 lug rear disc setup on a corp/eaton axle or the older 14 bolt unit. i still have the stock drums on my 72 burb c20 and the idea of using an aftermarket kit or adapter on my HD truck scares me. i also don't like the idea of the e-brake in the caliper (if you even get an e-brake with some of those kits) . i prefer the other style with the min-drum brake where the center of the rotor is the drum. advantes: no mechanism to jam up in the caliper the brake linings don't wear because they aren't used to stop drum shoes generally have more surface area for more rolling resistance |
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#7 |
Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,506
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Re: rear disc brakes on 3/4 ton and posi?
Their kit is really nice but most guys on here can beat their price by quite a bit by buying the brackets and picking up the rotors and calipers locally.
Price it out on your favorite parts houses website or by walking in with a shopping list. I asked and they wouldn't sell the brackets separate either. |
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#8 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Hey there,
Yeah it is a nice kit but I innately don't trust a caliper that is designed for a car on my 3/4 ton beast especially when towing a trailer or hauling a load ![]() Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#9 | |
Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,506
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Re: rear disc brakes on 3/4 ton and posi?
Quote:
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#10 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Ahh KK learned something new then. Oh well almost finished with this so no need to spend extra
![]() sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#11 |
Performance Shop Owner
![]() Join Date: Oct 2009
Location: Edmonton, Alberta, CANADA
Posts: 332
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Re: rear disc brakes on 3/4 ton and posi?
Keep me up-to-date too! I got 3 GMC/Chev 3/4tons!!!
__________________
1980 GMC C25 Sierra Classic with 20,000 ORIGINAL MILES (32,000Km's) & Matching numbers 1977 GMC C35 Sierra Classic Crew Cab 454 A/C with 21,000 Miles & Matching numbers 1980 Chevrolet Silverado K20 400 4spd 4X4 74,000km's 1980 GMC C25 Sierra Classic CREW CAB, All Options, with 49,000 Miles 1979 GMC C15 Sierra Classic 454 1989 GMC R3500 CREW CAB 2003 Grand Prix GTP 1998 Regal GS |
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#12 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
yeah ironically llol the chevy gmc dodge and ford all use the same backing plates and assemblies from trw on their truck rear disc brakes. I am using a set of rotors from a 2004 chevy 3/4 ton truck. will be getting the adapter rings next week and get some pictures of how it looks put together.
Sean plano texas
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#13 |
Registered User
![]() Join Date: Sep 2010
Location: Farmington, New Mexico
Posts: 248
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Re: rear disc brakes on 3/4 ton and posi?
I'm in the process of adapting 2001 Econoline 350 rear disc brakes to my '68 dana 60. I went with this setup because the Econolines are 8x6.5 and I work for a Ford dealer.
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#14 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
I got some pics of the progress we are making today the delrin block is almost finished machining we did a test fit today to make sure things were going to line up properly in the axle. The centering ring for the newer checy rotor worked beautifully on the older hub that I have.
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#15 |
Performance Shop Owner
![]() Join Date: Oct 2009
Location: Edmonton, Alberta, CANADA
Posts: 332
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Re: rear disc brakes on 3/4 ton and posi?
Super!
__________________
1980 GMC C25 Sierra Classic with 20,000 ORIGINAL MILES (32,000Km's) & Matching numbers 1977 GMC C35 Sierra Classic Crew Cab 454 A/C with 21,000 Miles & Matching numbers 1980 Chevrolet Silverado K20 400 4spd 4X4 74,000km's 1980 GMC C25 Sierra Classic CREW CAB, All Options, with 49,000 Miles 1979 GMC C15 Sierra Classic 454 1989 GMC R3500 CREW CAB 2003 Grand Prix GTP 1998 Regal GS |
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#16 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Ok guys n gals got more progress pics. Should be finishing this up in another 3 weeks and have designs sketches to share with yall. I have to get some more shorter 9/16 bolts at the moment will be picking them up tommorrow and getting all this on the axle after I finish getting the wifes new ride past inspection tommorrow will have more pictures then and do a trial fit of the brake brackets and calipers then back to the machinist for more trimming.
![]() Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#17 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
got some more updates was working with the plastic design block and looks like will have to go back and take another thousandths or so of the facing area got a slight rub from the rotor on the backing plate atm. The caliper also had to be spaced to center the caliper on the rotor. But so far coming out very nicely. Will get with the machinist this wednesday and start finishing this up. And of course getting him paid off lol
![]() Sean here are some pics for yall that are watching this.
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#18 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Well got the clearancing measurements done today. So far it looks like the the block needs to be thinned by 0.118 inches and a caliper bracket spacer needs to be made that is 0.445 inches thick now. the rotor was rubbing up against the backing plate tin now that that is clearanced should be good for final machining and assemble it. then next will be the custom brake likes for the axle and the hose also will probably reuse the dodge set that I have since they are in good shape. The brake pads are almost brand new as well so reusing them also. so far with the factory 3/4 studs have plenty of length to accomodate the rotor and a nice set of aluminum or alloy 8 lugs.
Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#19 |
Registered User
![]() Join Date: Sep 2010
Location: Farmington, New Mexico
Posts: 248
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Re: rear disc brakes on 3/4 ton and posi?
Sean, any interest in making an extra set of the adaptors and selling them? If so let me know thanks. Jerimiah
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#20 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Hey Jerimiah,
On that note not sure machinist would have to be willing and I will check and see. Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#21 |
Performance Shop Owner
![]() Join Date: Oct 2009
Location: Edmonton, Alberta, CANADA
Posts: 332
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Re: rear disc brakes on 3/4 ton and posi?
WOW, things have come a long way since I was last on here!
If they won't make the parts we'll need a list of parts we need... That looks great and must save a lot of weight! ha that rhymed! LOL
__________________
1980 GMC C25 Sierra Classic with 20,000 ORIGINAL MILES (32,000Km's) & Matching numbers 1977 GMC C35 Sierra Classic Crew Cab 454 A/C with 21,000 Miles & Matching numbers 1980 Chevrolet Silverado K20 400 4spd 4X4 74,000km's 1980 GMC C25 Sierra Classic CREW CAB, All Options, with 49,000 Miles 1979 GMC C15 Sierra Classic 454 1989 GMC R3500 CREW CAB 2003 Grand Prix GTP 1998 Regal GS |
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#22 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Well the machinist is a retired aerospace engineer lol. He does this as a help to us truckers. I will have a full set of plans and design sketches here after it is finished that you wil be able to take to any competent machinist and get the parts made. So far my cost for the machining alone is close to 360$. Picking up some bushings this wednesday along with the aluminum plates to take to him. the bushings I am going to file them gently and thin the barrel so I can insert them behind the rotor to keep the studs and rotor from moving. the stud is 1/2 inch and the stud hole on the the new rotor is 0.55 inches. I found some oillite bushings at a supplier here in dallas with an ID of 0.50 and OD .625 so should be able to gently file them down to fit. After that another 1/16th inch spacer behind the rotor should clear it from the backing plate. After that need to find some 9/16 opening spacers 3/4 inch width by .334 to .350 inches thick for the caliper bracket.
Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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#23 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Hey Guys,
Got some more done today picked up the bushings from the supplier a whopping 12$ for them and the flat bushings lol. Got them on the hub and voila with the lugnut in place and the wheel on no movement of the rotor on the hub. The bushings are 1/2 IDx5/8 OD with a 1/16Invh flange thickness. Got some pictures below. did not need to thin the barrle on the bushings they slipped in and dont have much play in them so I feel a little more comfortable that the rotor isnt going to slide around when braking. Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() Last edited by sdwolff98; 02-09-2011 at 02:26 PM. |
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#24 |
Old School
Join Date: Jan 2010
Location: Dover,AR
Posts: 185
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Re: rear disc brakes on 3/4 ton and posi?
Subscribed because I'm very interested in some future schematics.
__________________
#1 Project...69 Chevy swb Fleetside (Dad's truck) #2...1983 El Camino SS (Choo Choo Custom) #3...1974 Datsun truck (4.3L V6/4L60E) #4...1951 Cadillac Limo (1975 Caddy running gear) #5...1938 Dodge M38 3/4 ton Military truck #6...1968 Sportster XLCH trail bike 5 GMC & Chevy parts trucks 68 to 72 Last but not least; My 1978 Harley Davidson Electraglide (trusted & reliable companion for the last 30 years) |
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#25 |
Turning Wrenches Daily
Join Date: Sep 2003
Location: Gladewater Texas
Posts: 1,128
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Re: rear disc brakes on 3/4 ton and posi?
Awesome should have them ready after everything is assembled here in another 2 months. I am going to have to go to the dodge dealer to get part numbers for the backing plates. The calipers and caliper brackets can be bought at o'reillys and or autozone realtively cheaply. The machinist is making a new set of the bushings I bought from stainless steel so that here will be no slop in the rotor what so ever. je is also making a spacer bushing for the caliper bracket assembly.
Sean
__________________
Work! Play! Work work work! Money to play with. 64 GMC, 66 burb 4x4, and now 64 1ton money pits......ahhh life is good. Upcoming move back to Texas Dallas bound we are this september!!! 1964 GMC I1500 2wd (my baby) 8.1 allison 6 spd conversion Aka Smurf http://67-72chevytrucks.com/vboard/s...d.php?t=438342 2016 Ram Big Horn 4WD parts hauler 2010 Chevy HHR wife new car after the circled problem blew up!!! 1981 Ram D150 /6 auto Wife's sunday driver Living outside Gladewater Texas now working in Longview at the hospital there future project toys: 1966 Chevy K14 carryall aka Smurfette future project ![]() |
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