Dynamic Friction 370-47021 Drum Brake Hardware Kit - Rear

Brand	Dynamic Friction W37100
Bleeder Screw Cap Included	No
Bleeder Screw Included	Yes
Bore Diameter	1.125
Brake Component Inlet Thread Size	7/16-20 UNF
Brake Line Inlet Thread Diameter	0.437
Casting Material	Cast Iron
Package Contents	1 Drum Brake Wheel Cylinder
Product line	DFC Drum Brake Hardware Kit
Fits	—23 vehicles

Drum brake hardware kit. Provides the service parts needed for drum brake maintenance.

DFC brand line. Part of Dynamic Friction's brake service kit offering.

$20.14Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

Step 2 — Quantity

Drum Brake Hardware Kits are typically replaced in pairs, axle by axle.

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Free returns within 60 days if it doesn't fit when fitment is verified.

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DFC Drum Brake Hardware Kit for Rear Service

The Dynamic Friction DFC Drum Brake Hardware Kit, part number 370-47021, is a rear brake service kit for select Chevrolet and GMC heavy-duty applications. It is built for vehicles using specific rear drum brake configurations, including 13-inch rear drums and JB7 or JB8 brake setups.

Key Features

Brand: Dynamic Friction
Brand line: DFC Drum Brake Hardware Kit
Part number: 370-47021
Rear drum brake service kit for select Chevrolet and GMC trucks, vans, and Suburban models
Application-specific fitment for 13-inch rear drums and JB7/JB8 brake systems
Direct fit coverage for single rear wheel and dual rear wheel configurations where listed

Fitment Details

Fits 1975 Chevrolet C20, rear, 13 inch rear drums and JB7 brakes.
Fits 1974-1975 Chevrolet C20 Suburban, rear, 13 inch rear drums, JB7 brakes, over 7100 gross vehicle weight (GVW).
Fits 1975 Chevrolet C30, rear, 3-1/2 inch rear shoes, JB8 brakes, single rear wheels.
Fits 1975 Chevrolet C30, rear, 3-1/2 inch rear shoes, JB8 brakes, dual rear wheels.
Fits 1975 Chevrolet C30, rear, 2-1/2 inch rear shoes, JB7 brakes.
Fits 1975 Chevrolet G30, rear, single rear wheels.
Fits 1975 Chevrolet G30, rear, dual rear wheels.
Fits 1975 Chevrolet K20, rear, 13 inch rear drums, JB7 brakes, rotor only.
Fits 1974-1975 Chevrolet K20 Suburban, rear, 13-inch rear disc brake pads.
Fits 1975 Chevrolet P20, rear, 13 inch rear drums, JB7 brakes.
Fits 1975 GMC G35, rear, single rear wheels.
Fits 1975 GMC G35, rear, dual rear wheels.
Fits 1973-1974 GMC G35/G3500 Van, rear, dual rear wheels.
Fits 1974 GMC G35/G3500 Van, rear, single rear wheels.
Fits 1973 Chevrolet C20 Suburban, rear, 13-inch rear disc brake pads.
Fits 1972-1973 Chevrolet K20 Suburban, rear, 13-inch rear drums only, rotor not included.
Fits 1970-1972 GMC G35/G3500 Van, rear.

What This Kit Helps Address

Rear drum brake service on Chevrolet C20 and C30 trucks
Brake hardware wear on GMC G35 and G3500 vans
Maintenance for rear brake assemblies with JB7 or JB8 brake codes
Service needs on heavy-duty rear drum systems with 13-inch drums
Restoration work on older Chevrolet and GMC rear brake setups

Installation Notes and Tips

Confirm rear brake code, drum size, shoe width, wheel configuration, and model year before ordering. This part number 370-47021 is listed for specific rear applications only, including Chevrolet C20, C30, K20, P20, and GMC G35/G3500 fitments. Match the notes in the fitment table to your vehicle’s brake setup before installation.

Quality Assurance

Dynamic Friction supplies this DFC Drum Brake Hardware Kit as an application-specific brake service part for the listed Chevrolet and GMC vehicles. Part number 370-47021 is cataloged for direct fit use in the confirmed rear brake applications shown above.

This part fits 23 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Drive Type	Position	Notes
1975	Chevrolet	C20	—	Rear	13 inch Rear Drums and JB7 Brakes; DFC Drum Brake Hardware Kit
1975	Chevrolet	C20 Suburban	—	Rear	13 inch Rear Drums, JB7 Brakes, Over 7100 Gross Vehicle Weight (GVW); DFC Drum Brake Hardware Kit
1975	Chevrolet	C30	—	Rear	3-1/2 inch Rear Shoes, JB8 Brakes; Single Rear Wheels; DFC Drum Brake Hardware Kit
1975	Chevrolet	C30	—	Rear	3-1/2 inch Rear Shoes, JB8 Brakes; Dual Rear Wheels; DFC Drum Brake Hardware Kit
1975	Chevrolet	C30	—	Rear	2-1/2 inch Rear Shoes, JB7 Brakes; DFC Drum Brake Hardware Kit
1975	Chevrolet	G30	—	Rear	Single Rear Wheels; DFC Drum Brake Hardware Kit
1975	Chevrolet	G30	—	Rear	For vehicles with dual rear wheels.; DFC Drum Brake Hardware Kit
1975	Chevrolet	K20	—	Rear	13 inch Rear Drums; JB7 Brakes; Rotor Only; DFC Drum Brake Hardware Kit
1975	Chevrolet	K20 Suburban	—	Rear	13-inch rear disc brake pads; DFC Drum Brake Hardware Kit
1975	Chevrolet	P20	—	Rear	13 inch Rear Drums; JB7 Brakes; DFC Drum Brake Hardware Kit
1975	GMC	G35	—	Rear	For vehicles with dual rear wheels.; DFC Drum Brake Hardware Kit
1975	GMC	G35	—	Rear	Single Rear Wheels; DFC Drum Brake Hardware Kit
1974	Chevrolet	C20 Suburban	—	Rear	13 inch Rear Drums, JB7 Brakes, Over 7100 Gross Vehicle Weight (GVW); DFC Drum Brake Hardware Kit
1974	Chevrolet	K20 Suburban	4WD	Rear	13-inch rear disc brake pads; DFC Drum Brake Hardware Kit
1974	GMC	G35/G3500 Van	—	Rear	For vehicles with dual rear wheels.; DFC Drum Brake Hardware Kit
1974	GMC	G35/G3500 Van	—	Rear	Single Rear Wheels; DFC Drum Brake Hardware Kit
1973	Chevrolet	C20 Suburban	—	Rear	13-inch rear disc brake pads; DFC Drum Brake Hardware Kit
1973	Chevrolet	K20 Suburban	—	Rear	13-inch rear drums only; rotor not included; DFC Drum Brake Hardware Kit
1973	GMC	G35/G3500 Van	—	Rear	For vehicles with dual rear wheels.; DFC Drum Brake Hardware Kit
1972	Chevrolet	K20 Suburban	—	Rear	13-inch rear drums only; rotor not included; DFC Drum Brake Hardware Kit
1972	GMC	G35/G3500 Van	—	Rear	DFC Drum Brake Hardware Kit
1971	GMC	G35/G3500 Van	—	Rear	DFC Drum Brake Hardware Kit
1970	GMC	G35/G3500 Van	—	Rear	DFC Drum Brake Hardware Kit
No rows match your filter.

Directly replaces or cross-references 9 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

134.6203533525546805484-36035F71200W-82035W906246WC13525WC37100