Motion Trucking Parts

Premium Heavy-Duty Steer Axle Brake Drum

The Motion Trucking Parts 3800X Balanced Front Brake Drum is engineered for demanding heavy-duty commercial truck applications. Manufactured from premium high-strength cast iron and precision balanced for smooth operation, this brake drum delivers outstanding braking performance, superior heat dissipation, and extended service life.

Designed to meet or exceed OEM specifications, the 3800X provides exceptional durability, dimensional accuracy, and consistent braking performance for fleets, owner-operators, and repair facilities.

Features

• Premium balanced brake drum

• Manufactured from high-strength cast iron

• Precision machined for OE fit and performance

• Excellent heat dissipation for reduced brake fade

• Precision balanced to minimize vibration

• Heavy-duty construction for long service life

• Engineered for steer axle applications

• Meets or exceeds OEM specifications

• 100% quality inspected before shipment

Specifications

Brand: Motion Trucking Parts

Part Number: MTP-3800X

Position: Front / Steer Axle

Brake Drum Type: Balanced

Material: Premium Cast Iron

Mounting Type: Outboard

Wheel Type: Disc

Weight: 81 lbs

Bolt Hole Quantity: 10

Bolt Circle Diameter: 11.25 in

Bolt Hole Diameter: 1.35 in

Maximum Brake Diameter: 15.00 in

Maximum Wear Diameter: 15.12 in

Brake Shoe Width: 4.00 in

Brake Surface Width: 4.61 in

Overall Depth: 9.18 in

Mounting Flange Thickness: 0.50 in

Compatible Brake Shoes

This brake drum is designed for 15" × 4" brake shoe assemblies, including:

• 1308Q

• 1308E

• 4702Q / 4702QP (Meritor Q Plus steer axle applications)

• Compatible with Meritor Q Plus 15" × 4" steer axle brake systems.

Cross Reference

Replaces or Interchanges with:

Gunite

• 3800X

• 3726X

• 9001X

ConMet

• CM10009920

• 10009920

• 107164

Webb

• 65548B

• 65545B

Meritor / Rockwell

• 85-123448-002

• 8512344800

Alliance

• ABP N42A154B

Road Choice

• BD1504X-44

Applications

• Heavy-duty commercial trucks

• Class 8 tractors

• Steer axle applications

• Fleet maintenance

• Owner-operators

• Truck repair facilities

Why Choose Motion Trucking Parts?

At Motion Trucking Parts, we are committed to supplying premium-quality heavy-duty brake components that fleets can depend on. Every brake drum is manufactured with strict quality standards to ensure reliable braking performance, extended service life, and dependable operation under the toughest road conditions.

Motion Trucking Parts — Premium Quality Heavy-Duty Truck Parts Built for Performance.

Our 3807A Balanced Brake Drum is engineered to provide exceptional braking performance for heavy-duty commercial trucks. Manufactured from premium high-strength cast iron and precision balanced to reduce vibration, this brake drum delivers smooth braking, superior heat dissipation, and long-lasting durability in demanding fleet operations.

Designed as a direct replacement for OEM 3807A applications, this brake drum is precision machined to ensure consistent brake shoe contact, dependable stopping power, and extended brake system life. Its robust construction makes it ideal for fleets, repair shops, and owner-operators who demand reliable performance on every mile.

Features

• Precision balanced for smooth, vibration-free braking

• Premium high-strength cast iron construction

• Excellent heat dissipation helps reduce brake fade

• Precision-machined braking surface for consistent stopping performance

• Direct OEM replacement for easy installation

• Outboard mounting design for simplified brake service

• Built for heavy-duty commercial truck applications

• Ideal for fleets, repair facilities, and owner-operators

Specifications

• Industry Part Number: 3807A

• Brake Size: 16.5" × 7.00"

• Mounting Type: Outboard

• Bolt Holes: 10

• Bolt Circle Diameter: 11.25"

• Pilot Diameter: 8.78"

• Material: Premium Cast Iron

• Balanced: Yes

• Approximate Weight: 118 lb per drum

Common Cross Reference Numbers

• Gunite: 3807A, 3807AX

• Webb: 66864B

• ConMet: 10012574

• Meritor: 3214X

• Automann: 151.3807A

Always verify your OEM or interchange part number before ordering.

Applications

Fits many heavy-duty commercial truck drive axle and trailer applications using a 16.5" × 7" outboard-mounted brake drum. Commonly paired with 4707 brake shoes. Always verify brake dimensions and OEM part numbers to ensure proper fitment.

Why Choose Our Balanced Brake Drums?

Our balanced brake drums are manufactured to meet or exceed OEM specifications, providing reliable braking performance, reduced vibration, and extended service life. Built for demanding commercial trucking environments, they deliver the strength, durability, and consistent performance that fleets and owner-operators rely on every day.

Our Balanced Brake Drum 3600AX Replacement is engineered to deliver dependable braking performance for heavy-duty commercial trucks and trailers. Manufactured from premium cast iron and precision balanced to minimize vibration, this brake drum provides smooth braking, excellent heat dissipation, and extended service life under demanding highway and fleet applications.

Designed as a direct replacement for OEM 3600AX applications, it installs without modifications and is ideal for routine brake maintenance or complete brake system overhauls. Precision machining ensures consistent braking performance and reduced brake shoe wear.

Features

• Precision balanced for smooth, vibration-free braking

• Premium high-strength cast iron construction

• Excellent heat dissipation helps reduce brake fade

• Precision-machined braking surface for consistent performance

• Direct OEM replacement with no modifications required

• Ideal for heavy-duty trucks, tractors, and trailers

• Suitable for fleet and commercial applications

Specifications

• Industry Number: 3600AX

• Brake Size: 16.5" × 7"

• Mounting Type: Outboard

• Bolt Holes: 10

• Bolt Circle: 11.25"

• Pilot Diameter: 8.78"

• Material: High-quality Cast Iron

• Balanced: Yes

Common Replacement Numbers

• Gunite: 3600AX, 3600A

• Webb: 66864B

• ConMet: 10009830

• Meritor: 85-123207

• Automann: 145.3600AX

Applications

Fits many heavy-duty commercial truck and trailer brake systems using a 16.5" × 7" outboard-mounted brake drum. Always verify dimensions and OEM part numbers before ordering.

Our Balanced Brake Drum 3758 / 3598 Replacement is engineered to provide dependable stopping power for heavy-duty commercial trucks and trailers. Manufactured from premium-grade cast iron and precision balanced to minimize vibration, this brake drum delivers consistent braking performance, superior heat dissipation, and extended service life under demanding fleet operations.

Designed as a direct replacement for OEM 3758 and 3598 applications, this drum offers precise fitment and reliable performance for both fleet maintenance and owner-operator repairs. Every drum is machined to strict quality standards to ensure smooth braking and reduce brake shoe wear.

Features

• Precision balanced to reduce vibration and brake pulsation

• Premium high-strength cast iron construction

• Excellent heat dissipation for consistent braking performance

• Precision-machined braking surface for maximum durability

• Direct OEM replacement with no modifications required

• Ideal for commercial trucks, tractors, and trailers

• Built for demanding fleet and highway applications

Specifications

• Industry Part Number: 3758 / 3598

• Brake Size: 16.5" × 5"

• Mounting Type: Outboard

• Bolt Holes: 10

• Bolt Circle Diameter: 11.25"

• Pilot Diameter: 8.78"

• Overall Depth: 9.37"

• Material: Premium Cast Iron

• Balanced: Yes

• Approximate Weight: 95 lb per drum

Common Cross Reference Numbers

• Gunite: 3758, 3758X, 3598, 3598X

• Webb: 65151B

• ConMet: 10005332, 10014756, 107453

• Freightliner: N42A107453

• Meritor: 85123383002

Applications

Fits many heavy-duty truck and trailer brake systems using a 16.5" × 5" outboard-mounted brake drum, including applications equipped with 4720 brake shoes. Always verify brake dimensions and OEM part numbers before ordering.

Why Choose Our Balanced Brake Drums?

Our balanced brake drums are manufactured to meet or exceed OEM specifications, providing dependable braking performance, longer service life, and reduced maintenance costs. Every drum is engineered for consistent fit, durability, and reliable performance in demanding commercial trucking applications.