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America's Oldest Speed Shop ® 800.979.0122 Lincoln, NE
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800.979.0122

(CST) 7am - 10pm

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Mon-Fri 8am - 5pm

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855.313.9180

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Since 1952
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Complete Disc Brake Kit 1937-48 Ford, 5 on 5-1/2 BC

SAME DAY SHIPPING! Order within the next 13 hours 9 minutes and receive same day shipping

Free Shipping Free Shipping
Specs
Sold in Quantity:
Kit
Bolt Pattern:
5 on 5.5"
Caliper Finish:
Natural
Rotor Construction:
Vented
Rotor Diameter:
11.75
Caliper Pistons:
Single
Rotor Location:
Front
Rotor Shape:
Round
Hardware Included:
Yes
Garage Sale:
No
Drilled:
No
Slotted:
No
Notes
Includes rotors, bearings and seals, calipers, pads, brake hoses, brake tabs, and caliper brackets.
Complete Disc Brake Kit 1937-48 Ford, 5 on 5-1/2 BC
Complete Disc Brake Kit 1937-48 Ford, 5 on 5-1/2 BC
Product Video
Complete Disc Brake Kit 1937-48 Ford, 5 on 5-1/2 BC

Click image to enlarge

Watch the video below to learn how to correctly measure your wheel bolt pattern.

Please NOTE the following about this product:

  • This item is sold as a kit.

Details

Reviews

Q & A

What's in the Box

This complete disc brake kit easily installs big 11-3/4" rotors on your 1937-1948 Ford car or 1937-1947 Ford 1/2 ton pickup spindles while retaining the original 5 on 5-1/2" bolt circle.

This kit will work with spindles having either original steering arms or with flat steel steering arms. It will NOT work with forged aftermarket steering arms. Wheels must have 3-7/16" center hole and have been designed for disc brake applications. Will NOT work with early Ford factory wire or steel drum brake wheels. You will need to use a later disc brake steel wheel or aftermarket wheel.

910-31909 Instructions (PDF)

Item Details

'Ford 11-3/4" rotors to ''37-''47 Ford 1/2 ton pickup & ''37-''48 Ford car spindles'

Notes

  1. This kit is NOT compatible with early style 5 x 5-1/2" drum brake wheels. Wheels being used must be disc brake compatible.
  2. Kit does not include washers or spindle nuts.

Customer Reviews

Rated 4.7 out of 5 by 12 reviewers.
RATING BREAKDOWN
12 reviews
5 Stars
8
4 Stars
4
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

tls3028
Verified Purchaser
Pigeon Forge, Tn

Nice conversion

May 22, 2015
This is converting a 40 Ford Convertible to front disk brakes. It is a fair price for the kit. Overall it is a quality kit. I had some issues that are not going to occur on all of the kits. Speedway was great in correcting the problems.
Pros:
  • Excellent Tech Support
  • Good fit and finish
  • Excellent Customer Serv
  • Versatile Boltnut Kit
Cons:
  • R
  • Wrong Size Hoses
  • Wrong Bolt Length Sent
  • Machining Is Fair At Best
  • 1 Race Machined Offcenter
  • Caliper Mount Threads Poo
Yes, I recommend this product.
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Kracken
Virginia, USA

Great Kit and Instructions

September 23, 2014
I am mechanicly inclined and can follow directions. I am by no means a shade tree mechanic. I am the type of guy that has to look at 3 or 4 videos on youtube before I feel comfortable enough the tackel the individual steps. That being said, this kit was very easy to install. The one spot of difficulty was removing the inner wheel bearing races. There is no slot on the rotor casting to be able to get a good edge for a punch to knock it out. After about 30 minutes of trying and beating myself up I gave up. Then I found some videos where folks used mig welders to weld a bead on just the race. It worked. The weld somehow shrunk the race and it just fell out. Be sure not to weld it to the rotor or you are out of luck. Overall, I had no issues with this kit. It went together just as instructed. I took me 7 - 8 hours of total time to do this project including installing a proportioning valve (not included inthe kit) and bleeding the brakes. The difference in performance is remarkable. I can stop 20 ft shorter going 30 mph than I could with the old drum brakes. I would defiitely do this again if I had another vehicle. This kind of kit, the reasonable price, and the wonderful technical suport I received have made me a life-long speedway customer. You are doing Speedy proud.
Pros:
  • Great instructions
  • reasonable cost
  • great phone tech support
Cons:
  • inner wheel bearing removal
  • i did not buy this sooner
Yes, I recommend this product.
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Unc27
Elgin, IL, USA

Done in a day.

August 25, 2014
Everything fit pretty good. I had to grind down part of the casting on the calipers to get them to fit right, which is in the instructions. Also had to grind a slot into one of the brackets to clear a bolt on the drivers side. I wound up using the stock bearing cups that you're supposed to replace and just doubled up the washer between the wheel bearing and castle nut on the spindle. Used the old ones and new ones that came with the kit. Everything is snug and the cotter pin is doing it's job so I think that's an easier fix. Got it all done in about 6 hours including 2 trips to NAPA. Haven't driven the truck yet but we will see. Good kit for the price!
Pros:
  • Right price
  • Fairly easy to install
Cons:
  • instructions could be better
  • some fab work needed
Yes, I recommend this product.
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Unc27
Elgin, IL, USA

Done in a day.

August 25, 2014
Everything fit pretty good. I had to grind down part of the casting on the calipers to get them to fit right, which is in the instructions. Also had to grind a slot into one of the brackets to clear a bolt on the drivers side. I wound up using the stock bearing cups that you're supposed to replace and just doubled up the washer between the wheel bearing and castle nut on the spindle. Used the old ones and new ones that came with the kit. Everything is snug and the cotter pin is doing it's job so I think that's an easier fix. Got it all done in about 6 hours including 2 trips to NAPA. Haven't driven the truck yet but we will see. Good kit for the price!
Pros:
  • Fairly easy to install
  • Right price
Cons:
  • instructions could be better
  • some fab work needed
Yes, I recommend this product.
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builtinabarn
Amherstburg, ON, Canada

making the old truckstop ona dime

September 05, 2013
this kit is so easy to install and I was amazed. that the kit is so complete that everything was included...........the price for all of the parts that were include make this a great value. speedway, you have one fine product.
Pros:
  • everything is there
  • lage brakes
  • Great Value
Cons:
  • you could dis assemble the outer bearing races
Yes, I recommend this product.
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Fab40
Texas

Easy install

July 20, 2013
The only thing i had to tweak was adding (1) 1/8'' washer to each caliper bracket spacer (total of 3) so that the inside disc pad would fit between the caliper piston and the rotor. Everything else went right into place and looks great.
Yes, I recommend this product.
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Hillstucson
Tucson, AZ, USA

Perfect piece to my puzzle

February 27, 2013
This product was very easy to install. Can't wait to do the rears!!!!!
Yes, I recommend this product.
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Grave Digger
Verified Purchaser
Lumberton,Ms

Best buy for the money

September 10, 2012
this is the best product for the money I have found
Pros:
  • Lightweight
  • Easy To Install
Yes, I recommend this product.
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Newell King
Verified Purchaser
Summerville, SC

making a 40 Ford stop fast

August 10, 2012
I wanted A stock appearing 40 Ford Pickup but when driving it stopped like a 70+ year old car now when you tap on the brakes it stops like a modern day car.unless you crawl under the vehicle and look their are no signs visible that it has front disc brakes the 1940 Factory Stock wheels will work (solid steel).
Pros:
  • No Fade
  • Decreased Stopping Distance
  • Easy To Install
Yes, I recommend this product.
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Jimi-Neutron
Washington, UT

Kit worked great!

July 03, 2011
This was a great kit for my custom application. I was even able to get my forged steering arm to work with some slight modification.
Pros:
  • Easy To Install
Yes, I recommend this product.
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Page 1 of 2

Product Q&A

20 questions : 21 answers

1 answers

will this kit widen my track with vs my stock 46 ford pickup drums. if so how much?

drg281
Spring tx
March 26, 2015

will this kit widen my track with vs my stock 46 ford pickup drums. if so how much?

Answers

March 27, 2015
EricM
This brake kit on a 48” axle nets 56 1/2" from hub face to hub face. Depending on your axle which is measured from kingpin to kingpin centerline you can easily calculate the difference. If you have a 50” axle it would be 58 1/2" etc.
1 answers

I am looking at the 916-31909 caliper bracket to achieve a 5 on 5 pattern I purchased a dropped axle with a disc brake conversion a friend decided not to use. It had what looked like the same calipers and rotors that were on my 72 Camaro. It also looked like your 910-31921. I want a 5 on 5 bolt pattern so I looked for a rotor that would work. Closest I could find was a Centric # 121.62003 that fit a 77 Cadillac Deville. It appears to use the same bearings as the Chevy rotor and is 1 inch thick but it is 11.89 in diameter. Do you think your 916-31909 caliper brackets would work with the Cad rotors . It appears the Ford rotors are 11.72 in diameter.

27Tudor
August 14, 2014

I am looking at the 916-31909 caliper bracket to achieve a 5 on 5 pattern I purchased a dropped axle with a disc brake conversion a friend decided not to use. It had what looked like the same calipers and rotors that were on my 72 Camaro. It also looked like your 910-31921. I want a 5 on 5 bolt pattern so I looked for a rotor that would work. Closest I could find was a Centric # 121.62003 that fit a 77 Cadillac Deville. It appears to use the same bearings as the Chevy rotor and is 1 inch thick but it is 11.89 in diameter. Do you think your 916-31909 caliper brackets would work with the Cad rotors . It appears the Ford rotors are 11.72 in diameter.

Answers

August 15, 2014
EricM
The small difference in rotor diameter will probably not cause an issue. The only way to know for sure is to give it a try however. Sorry we have never tried using this bracket with the Cadillac rotor that you mention.
1 answers

Disk Brake kit on 1934 Ford using 2 inch drop original axle and 16 inch ford wire wheels I wish to run a disk brake system on my 1934 Ford Tudor and run my original 16 inch wire wheels. Will the 5 by 5.5 inch disk brake kit fit my 1934 I beam axle. Do I need to change out my stock spindles. Will I need to add spacers.

1933Phaeton
Australia
August 05, 2014

Disk Brake kit on 1934 Ford using 2 inch drop original axle and 16 inch ford wire wheels I wish to run a disk brake system on my 1934 Ford Tudor and run my original 16 inch wire wheels. Will the 5 by 5.5 inch disk brake kit fit my 1934 I beam axle. Do I need to change out my stock spindles. Will I need to add spacers.

Answers

August 07, 2014
EricM
This brake kit with 5 on 5.5" bolt pattern will not fit the 34 spindles and you will need to use our 28-48 spindles part number 91032104 on your axle. These have the same king pin diameter so it is an easy swap. Then on the wheels a spacer is normally required but the thickness varies. If you lay a ruler across the back side of your wheel in the center and measure down to the mount surface where it meets the hub anything over 3/4” will require that much of a spacer. For example if you wheel measures 1 1/4" then you would need 1/2" spacer.
2 answers

Bearings Several of the reviews mention difficulty with installing the bearings. Do you have a tool available to install them? Any online videos showing the bearing installation and the installation of this product?

Kracken
Virginia, USA
June 06, 2014

Bearings Several of the reviews mention difficulty with installing the bearings. Do you have a tool available to install them? Any online videos showing the bearing installation and the installation of this product?

Answers

September 24, 2014
Kracken
Look online at the videos which instruct you about how to remove a bearing race using a mig welder. I was unable to beat them out with a punch. There is no slot in the rotor casting for a punch and there is barely enough of a lip to catch the punch. I gave up after about 30 minutes. I then saw some videos on how to use the welder. Some of the videos were from mechanics courses so I felt that this was a legitimate course of action. I tried it and it worked. I welded a bead with my mig welder rignt on the race and as it cooled, it fell right out. Be sure that you do not weld on the edge of the race as you may mistakenly weld it to the rotor. That would be bad. Also, consider using welding paste to make the unwanted splatter easy to remove.
June 09, 2014
EricM
Removal of the old race is the most challenging part. You will need a punch, a hammer, and some patients to remove it. To drive the new race in a driver such as 91089625 is a big help.
1 answers

well tthey fit1947 mercury 15 inch rim

fuelstar
new zealand
April 16, 2014

well tthey fit1947 mercury 15 inch rim

Answers

April 16, 2014
EricM
No this brake kit will not accept a stock 47 Mercury wheel. The early wheels wrapped around the brake drum and on the 11 ¾” diameter rotor and adding for the caliper you would need 14.5” minimum for clearance inside the wheel. Sorry I do not offer a disc brake kit that will work with your wheels.
1 answers

Will these fit 15'' wheels? Will this kit fit in 15" aftermarket wheels that were designed for disk brakes?

DanMN
January 27, 2014

Will these fit 15'' wheels? Will this kit fit in 15" aftermarket wheels that were designed for disk brakes?

Answers

January 27, 2014
EricM
Yes your aftermarket 15" wheels will work fine with this disc brake kit.
1 answers

Is this kit available with a 5 on4.5 bolt patern

Ruby
Downs ks
January 01, 2014

Is this kit available with a 5 on4.5 bolt patern

Answers

January 02, 2014
EricM
Our disc brake kit for 37-48 Ford spindles using 5 on 4 1/2" bolt pattern is part number 91031945.
1 answers

Will my stock 1951 Ford F1 wheels work with this kit?? I have 1938 spindles in an aftermarket (Speedway) tubular front axle. I'll be using a traditional steering set up much like the one in the Tardell-Bishop book. the wheels are 7x16 on 5 1/2 with the 3 7/16 centers.

Bud45
da' UP
November 14, 2013

Will my stock 1951 Ford F1 wheels work with this kit?? I have 1938 spindles in an aftermarket (Speedway) tubular front axle. I'll be using a traditional steering set up much like the one in the Tardell-Bishop book. the wheels are 7x16 on 5 1/2 with the 3 7/16 centers.

Answers

November 14, 2013
Jason
Your 51 Ford wheel should have a 5 on 4 ½ unless it is a pickup. The pickup carried the 5 on 5 ½ pattern thru 51. If it is the 4 ½ then we offer several kits with that pattern. Our best seller is number 91031945 and this works with most wheels The 5 on 5 ½ pattern in kit number 91031909 has larger rotors and may not work with your application. The vintage 51 wheels commonly wrapped around the brake drums and if you lay a 12” ruler across the center and measure down to the bolt surface anything over ¾ “ will be the amount of spacer to clear the rotor.
1 answers

Will this kit keep the same Wheel mount surface width the same as the drums? I have a axle with the 3-3/8 four bolt pattern . It has 5x5-1/2 bolt . I pretty sure it's a OEM axle . Can you possible tell me like what my spindle length should be and bearing spindle size ?

Chopshop
Windsor, CA
November 01, 2013

Will this kit keep the same Wheel mount surface width the same as the drums? I have a axle with the 3-3/8 four bolt pattern . It has 5x5-1/2 bolt . I pretty sure it's a OEM axle . Can you possible tell me like what my spindle length should be and bearing spindle size ?

Answers

November 04, 2013
Jason
Brake kit number 91031909 for disc brakes may have similar dimensions for the wheel bolt surface but if planning on using the original wheels the clearance problems occur in the area of the caliper. With the wheel you plan on using removed from the vehicle lay a 12” ruler across the center on the back side. Measure down to the bolt surface and anything over ¾” will require that much of a spacer to achieve caliper clearance.
1 answers

will this fit my '31 Model A will this kit fit my Model A w/stock spindles? what modifications would be necessary to my stock suspension? what other items do you recommend I purchase (like spindles, etc.) to make installation easiest? thanks!

artt
July 21, 2013

will this fit my '31 Model A will this kit fit my Model A w/stock spindles? what modifications would be necessary to my stock suspension? what other items do you recommend I purchase (like spindles, etc.) to make installation easiest? thanks!

Answers

July 23, 2013
Jason
Kit number 91031909 has the early 5 on 5 ½ bolt pattern but the original wheels will not work off your Model A as they wrapped around the brake drum and will run into the caliper before they are seated on the mount surface. For ease of assembly here is a list of the parts needed for your Model A. 91031909---Brake kit 91032104---Spindle and king pin kit 91632022---Flat plate steering arms 91632501---Tie rod in the length needed 7204010---Upper steering arm. 1750128---Heim end for the upper steering arm to drag link. Then of course you will need the brake components to complete the job. Depending on the lay out of your Model A would dictate the brake components used.
Page 1 of 2

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Wilwood 290-0632 570 Brake Fluid, 12 oz Bottle
(Part #8352900632)
                        

Wilwood's specially formulated Hi-Temp 570° Racing Brake Fluid has a minimum 570 degree dry boiling point to withstand the severe heat requirements of automotive racing. Hi-Temp 570's low viscosity allows easy bleeding of your brake system, eliminating aeration of the brake fluid caused by foaming due to excessive pumping of the pedal. 

This high temp brake fluid comes in a convenient 12 ounce container hermetically sealed to guarantee against unwanted absorption of moisture which can drastically lower the fluids boiling point (fluid from larger containers tends to become contaminated with moisture, lowering its boiling point and making it unsuitable for racing applications). 

  • Dry Boiling Point:  573° F
  • Wet Boiling Point:  313° F

8352900632 Instructions (PDF)