1947 to 1959 Chevrolet GMC Front Disc Brake Conversion For truck with a Single rear wheel and a short Front Hub.
This conversion allows you to bolt on GM 2500 HD brakes on to you existing hub and spindle. We supply you with the parts that need to be machined and welded so you just bolt it together. Read the installation instructions here along with the required parts list.
What we supply:
2, Spindle to caliper brackets
2, Aluminum wheel spacers
16, Rotor locator sleeves
Grade 8 bolts and lock nuts
4, Stud height tools
Complete installation instructions and phone support when ever you need it.
All our parts are machined, welded and fit to a spindle of the year you tell us you have. Some years have 7/16" upper backing plate bolts and some have 1/2" bolts. All have 1/2" lower steering arm bolts. We supply both options.
What you supply new or used from a 2003 up GM 2500 HD Turbo diesel or equivalent truck:
1, Wagner CRB134347 Caliper with mounting bracket
1, Wagner CRB134348 Caliper with mounting bracket
2, BENDIX PRT5261 Rotor
1, BENDIX RD784 Brake Pad
2, wheel seals NATIONAL 40973S for original hub, check for your year
1 each Left and right hoses. There are two brackets on the new hoses and one can be cut off, the other is used as a hose mount.
4, Carlson® H805caliper mounting bracket bolt or GM 18026702 these mount the caliper bracket to our spindle bracket
2, DORMAN HW1457 Hydraulic Hose Clip, these clip the hose to the stock hose bracket. You do need to notch the old bracket a bit for the tang on the hoses.
2, Banjo Bolts DORMAN 484205 (484-205.1)
4, copper hose washers, they may come with the hoses
2, Inverted flares for the hoses. They use a 7/16 nut with a 3 /16 line. They can be purchased at http://www.fedhillusa.com or other brake parts retailers
A12-3 - 7/16" x 24 tpi male fully threaded steel nut, .550” long overall, it’s red in color. If you’re using ¼ lines then a standard nut will do.
If you have access to a recyclers then you may be able to score these parts for as little as $100 - $150. Just make sure you get all the bolts, clips and flare nuts along with the hard parts
Express van use the same parts just look for 8 lug 8600 lb brakes.
Dorman Replacement studs and nuts for the stock Chevy GMC hub
Studs - 610-183 1/2"-20
Lug nut - 611-016 1/2"-20
Master Cylinder Considerations.
Using the stock master cylinder is not recommended on a disc brake system. Do not mix front modern disc brake with original rear drum brakes. We recommend using a disc brake master cylinder with an 7" dual diaphragm booster and a 1.25" cylinder bore. 2500 HD Disc brakes require more fluid movement than a 1/2 ton 7/8 or 1" cylinder can deliver. You can purchase the matching booster and master cylinder kit from us as well. Our master booster kit produces approximately 1200 psi of line pressure and works with the stock brake and clutch pedal.
We can also send you a shopping cart from Rockauto.com with the needed items so you can purchase them or just get a price.
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