Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
Gunite · Brakes & Wheel End
3922X
In stock · ships from Knoxville
The Gunite 3922X is a heavy-duty cast iron brake drum for outboard mounting, sized 16.5 inches in diameter by 7 inches overall width.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Fits rear-axle brake assemblies on Fruehauf and Strick van, refrigerated, and flatbed trailers. Confirm with OEM reference 85123788002. Pair with FMSI 4709 standard or 4707 Q-Plus brake shoes.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It serves as the friction surface for S-cam brake shoes on the rear axles of Fruehauf and Strick trailers, absorbing and dissipating the heat generated during braking. Replacement is necessary when the braking surface wears beyond the maximum diameter of 16.62 inches, or when cracking, heat checking, or bellmouthing develop. This drum is designed for on-highway use and pairs with FMSI 4709 standard or 4707 Q-Plus brake shoes for a complete axle-end rebuild.
Part Number: 3922X
BRAKE DRUM 16.5X7 66864B/FLT4400B/3922X
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
