HomeBrake > Hardware, Fasteners and FittingsDorman W37999 Drum Brake Wheel Cylinder - Rear
Part #: W37999

Dorman W37999 Drum Brake Wheel Cylinder - Rear

Rear
⚙️ 5 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$25.90Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford, Aerostar
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Drum Brake Wheel Cylinder for Ford Aerostar

The Dorman W37999 drum brake wheel cylinder is designed specifically for Ford Aerostar models, providing dependable brake hydraulics performance. Crafted from durable cast iron, this wheel cylinder ensures consistent braking pressure and long-lasting service.

Key Features of Dorman W37999 Drum Brake Wheel Cylinder

  • Constructed from cast iron for strength and durability
  • Bore diameter of 0.938 inches for precise fitment
  • Includes bleeder screw for easy brake system maintenance
  • Brake component inlet thread size of 3/8-24 inches
  • Thread diameter of 3/8 inch for secure installation
  • Package contains one drum brake wheel cylinder

Detailed Description of the Dorman W37999 Wheel Cylinder

This drum brake wheel cylinder is engineered to meet the specifications required by Ford Aerostar vehicles. The cast iron casting material provides resistance to wear and corrosion, ensuring reliable brake hydraulics operation. The included bleeder screw allows for efficient removal of air from the brake system, which is essential for maintaining proper brake function. With a bore diameter of 0.938 inches and a brake component inlet thread size of 3/8-24 inches, this wheel cylinder fits precisely within the drum brake assembly, contributing to consistent braking performance.

Common Applications and Issues Addressed

  • Replacement for leaking or damaged drum brake wheel cylinders on Ford Aerostar
  • Resolves brake fluid leaks that cause reduced braking efficiency
  • Addresses uneven brake pressure leading to pulling or dragging brakes
  • Fixes brake pedal softness caused by internal cylinder wear
  • Restores proper brake hydraulics function for safer vehicle operation

Installation Notes and Tips

When installing the Dorman W37999 drum brake wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely lifted. Use the included bleeder screw to properly bleed the brake system after installation to remove any trapped air. Verify that the thread sizes match the existing brake lines and fittings to avoid leaks. It is recommended to inspect related brake components such as shoes and drums during installation for optimal performance.

Quality Assurance and Warranty Information

Dorman manufactures the W37999 wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction is tested for durability and resistance to corrosion. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship under normal use.

BrandDorman
Part NumberW37999
Bleeder Screw Cap IncludedNo
Bleeder Screw IncludedYes
Bore Diameter0.938
Brake Component Inlet Thread Size3/8-24 in
Casting MaterialCast Iron
Package Contents1 Drum Brake Wheel Cylinder
Thread Diameter3/8

This part fits 5 vehicles. Search below:

YearMakeModelPositionNotes
1997FordAerostarRearFits 15/16" bore size drum brakes on multiple vehicle models.
1996FordAerostarRearFits 15/16" bore size drum brakes on multiple vehicle models.
1995FordAerostarRearFits 15/16" bore size drum brakes on multiple vehicle models.
1994FordAerostarRearFits 15/16" bore size drum brakes on multiple vehicle models.
1993FordAerostarRearFits 15/16" bore size drum brakes on multiple vehicle models.

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

This part directly replaces or is cross-referenced with the following part numbers:

134.6501718E400203799934120784-42017F131372F39Z2261AW-85017W906733WC14120

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