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.

Meritor · Brakes & Wheel End
3299A5981
In stock · ships from Knoxville
This is a genuine Meritor mounting bracket for air brake chambers, primarily used on trailer axles with a 5-inch diameter tube.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 8 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
GMC
Other applications
GMC
Other applications
Designed for trailer axles with 5" round axle tubes. Commonly used across many heavy-duty trailer and truck applications; supersedes several OEM part numbers.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 12 of 12.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It secures the brake chamber (often a spring brake chamber) to the axle, ensuring proper alignment and force transmission for the braking system. Replacement is typically needed when the original bracket is bent, cracked, or corroded, or during a brake chamber replacement if the bracket is worn or damaged.
Part Number: 3299A5981
BRAKE CHAMBER BRKT MOUNT
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end