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Weld-On Rear Disc Brake Kit, 1969-77 GM Caliper, 3 Inch Backspace

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Specs
Sold in Quantity:
Kit
Finish:
Natural
Caliper Finish:
Natural
Rotor Construction:
Vented
Rotor Diameter:
11.75
Rotor Hat Bolt Pattern:
8 x 7.00"
Material Type:
Cast Iron
Bolt Pattern:
Multi: 5 on 5"/4.75"/4.50"
Caliper Pistons:
Single
Rotor Location:
Rear
Rotor Shape:
Round
Thread Pitch:
7/16"-20
Hardware Included:
Yes
Parking Brake Provision:
No
Drilled:
No
Slotted:
No
Centerline of Holes:
7.00
Rotor Thickness:
.81
Rotor Backspace:
3.00
Notes
Includes rotors, rotor hats, caliper brackets, calipers, pads, and hardware.
Weld-On Rear Disc Brake Kit, 1969-77 GM Caliper, 3 Inch Backspace

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (7)

Q & A (7)

What's in the Box

Info

Replace those old drum brakes with modern rear disc brakes. Steel rotor hat mounts .81" x 11-3/4" Pro-lite vented iron rotors and calipers to 3" tube rear end.  Complete with rotors, hats, calipers (7/16"-20 inlets), brackets, brake pads, caliper brackets and slider bolts. 

Hat fits 5 lug hubs with 4-1/2", 4-3/4", or 5" bolt circle.

Installation note: Due to a wide variation in daimeters of axle flanges and center hubs from manufacturers, it may be necessary to turn these diameters down to the proper dimensions.

910-31936 Instructions (PDF)

Customer Reviews

Rated 4.3 out of 5 by 7 reviewers.
RATING BREAKDOWN
7 reviews
5 Stars
4
4 Stars
2
3 Stars
0
2 Stars
1
1 Star
0
RECOMMEND THIS PRODUCT:

Mike
Verified Purchaser
Verified Reviewer
Hannibal mo

worked great all parts weree in the box

July 04, 2016
it worked well easy to install
Pros:
  • Worked Well
Cons:
  • None
Yes, I recommend this product.
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Tim
Marina ca

Moser axles

September 28, 2015
This kit will not work with after market Moser axles. The axle flange is to large and will have to be turned down. They will not fit 67-70 c10 wheel flanges either.
Pros:
  • Easy
Yes, I recommend this product.
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smith42
grayson ky

great products at a reasonable price

March 18, 2015
Easy to install works much better then the drum brakes that were on my car.
Yes, I recommend this product.
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56 chevy drag truck
Verified Purchaser
south carolina

don't use the inner clip on the brak pad

July 17, 2012
install by putting pads into calipers and onto the bracket, and do not use pad clip, or you cannot dissassemble caliper and pads once welded into place. I put the 'HAT and rotor' on the axle with 1 washer per stud between axle hub and 'HAT'. This will shift the caliper mounting position outboard by thickness of washer, giving a needed clearance for easy caliper removal and pad change. Once bracket is welded, remove washers between axle hub and 'hat', reassemble. The process is easy and they work great.
Pros:
  • Easy To Install
Yes, I recommend this product.
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Was this review helpful? 0 0

FISH
Verified Purchaser
South Dakota

Nice Kit to upgrade with.

March 09, 2012
lacks good pictures for assembly and fitting size for caliper. ie what hose type banjo fitting. having the hoses included would make it a complete KIT.
Yes, I recommend this product.
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Budd
Verified Purchaser
Michigan

too heavy

November 18, 2010
Brakes were too heavy to put on to my race car. I can't send them back as they weigh so much it would cost alot to ship back. So I will try to sell them for less than I paid.
Pros:
  • Quality was fine
No, I would not recommend this product.
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Gallentine Racing
Nebraska

priced right

January 30, 2010
best grouped package for a reasonable priced disc brake conversion.
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

7 questions : 7 answers

1 answers

what fitting adapter do i need for 3/16 brake line?

velma
Bullhead City, AZ, USA
February 12, 2015

what fitting adapter do i need for 3/16 brake line?

Answers

February 12, 2015
EricM
A flexible brake line such as kit 6178563 or 6178562 will need to be used in order to allow the caliper to move freely. You can then connect your 3/16" hard lines to the adapter included in that brake line kit.
1 answers

what is calliper puck size ? if not 2.5 inch can i upgrade ?

bumper9j
Dunnellon, FL, USA
September 28, 2014

what is calliper puck size ? if not 2.5 inch can i upgrade ?

Answers

September 29, 2014
EricM
These calipers have a 2.8" diameter piston.
1 answers

Will this kit fit with a 15" wheel??

ChevyC10
May 07, 2013

Will this kit fit with a 15" wheel??

Answers

May 08, 2013
Jason
The weld on rear disc brake kit will work with most 15" wheels.
1 answers

How do i determine the correct backspacing I am looking to put this on a 1967 C10 pickup. I am thinking that the 3" backspace would work but I am not sure. thanks Dave

Z06Vert
Tampa, FL, USA
November 05, 2012

How do i determine the correct backspacing I am looking to put this on a 1967 C10 pickup. I am thinking that the 3" backspace would work but I am not sure. thanks Dave

Answers

November 06, 2012
Jason
The 3” backspace is probably the most common and location depends on the offset of the axle from the housing flange. For example if you have a 2 ½” axle offset from the backing plate mounting flange the 3” backspace would put the rotor inward approximately an additional ½”. Your caliper will straddle the rotor disc and you could compare this location to your wheel well of your pickup to determine location and clearance. If you are running a stock width housing on your pickup the 3” backspace should be fine.
1 answers

how do i put it together?

the rodder
idaho
April 24, 2011

how do i put it together?

Answers

April 26, 2011
Tech Support
Below are the instructions to this kit. http://static.speedwaymotors.com/pdf/910-31936.pdf
1 answers

Will these take 1/2" studs?

Jay
May 28, 2015

Will these take 1/2" studs?

Answers

May 29, 2015
Eric
Expert
Yes the hats in this kit are compatible with up to 1/2" wheel studs.
1 answers

I have a early 80s 12 bolt running 24" wheels the axle flanges have been cut off and smoothed out. What hats should I get 2" or 3"

K rabb
Leduc Ab CA
June 23, 2016

I have a early 80s 12 bolt running 24" wheels the axle flanges have been cut off and smoothed out. What hats should I get 2" or 3"

Answers

June 24, 2016
Zach
Expert
I would say either one would work but I would take a few measurements to see which amount of back space would work best and give the best clearance for your setup.
Page 1 of 1

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