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  3. DORMAN FIRST ATSP20240129A3949-AO

ATSP20240129A3949-AO DORMAN FIRST STOP Rear Drum Brake Master

fits make: Pontiac. year: 1992–1998.

ATSP20240129A3949-AO DORMAN FIRST STOP Rear Drum Brake Master
Product Aspects
BrandDORMAN FIRST STOP
Manufacturer Part NumberATSP20240129A3949-AO
Bore Size0.938 IN.
Brake Component Inlet Thread SizeM10 X 1.0
Part TypeDRUM BRAKE WHEEL CYLINDER
Package Included2 REAR DRUM BRAKE WHEEL CYLINDER
CategoryWHEEL CYLINDERS PARTS
Placement On VehicleREAR
Ipn784-44022
Oe/oem Part Number1999 2000 2001 2002 2003 2004 2005 PONTIAC MONTANA 3.4L 3.5L V6, 1992 1993 1994 1995 OLDSMOBILE 88 3.8L V6, 1991 1992 1993 1994 1995 OLDSMOBILE 98 3.8L V6, 1991 1992 1993 1994 1995 PONTIAC BONNEVILLE 3.8L V6, 1992 1993 1994 CHEVROLET LUMINA APV 3.1L 3.8L V6, 1991 1992 CADILLAC FLEETWOOD 4.9L V8, 1991 1992 1993 CADILLAC DEVILLE 4.9L V8, 1991 1992 1993 1994 1995 BUICK PARK AVENUE 3.8L V6, 1992 1993 1994 1995 BUICK LESABRE 3.8L V6, LIMITED, SSE, WARNER, LE, 60, PREMIERE, LT, MONTANA, SPRING, ROYALE, SV6, GL, PLUS, SE, GS, BASE, REGENCY, CUSTOM, VALUE
California Prop 65 WarningWARNING

Review DORMAN FIRST STOP 2pcs Rear Drum Brake Wheel Cylinder For Pontiac Trans Sport for PONTIAC 1992–1998

Introducing the Dorman First ATS P20240129A3949-AO Rear Drum Brake Wheel Cylinder, specifically designed for Pontiac Trans Sport vehicles manufactured between 1992 and 1998. This premium replacement part is engineered to restore the braking performance of your vehicle, ensuring your safety and peace of mind.

The wheel cylinder is a critical component in your vehicle's drum brake system. It converts the linear force of the brake pedal into the hydraulic force needed to expand the brake shoes and make contact with the drum, slowing down or stopping the vehicle. Over time, the wheel cylinder can wear out, leading to a spongy brake pedal or longer stopping distances.

The Dorman First ATS P20240129A3949-AO Rear Drum Brake Wheel Cylinder is engineered using high-quality materials for durability and resistance to leaking. Each cylinder undergoes rigorous testing to ensure it meets or exceeds OE specifications, providing you with a reliable and effective brake solution.

This wheel cylinder comes with all necessary hardware, including mounting bolts and seals, for a straightforward installation process. The included installation instructions detail each step of the way, making it easy for even the most novice DIYers to complete the job.

By choosing the Dorman First ATS P20240129A3949-AO Rear Drum Brake Wheel Cylinder, you're investing in a high-quality, long-lasting replacement part that will help keep your Pontiac Trans Sport safely on the road. Your braking system is crucial to the overall performance and safety of your vehicle, and this wheel cylinder is the perfect solution for maintaining its optimal function.

Dorman First ATS20240129A3949-AO Rear Drum Brake Wheel Cylinder for Pontiac Trans Sport (1992-1998): A Comprehensive Analysis

Introduction:

The Dorman First ATS20240129A3949-AO Rear Drum Brake Wheel Cylinder is designed to fit Pontiac Trans Sport vehicles manufactured between 1992 and 1998. This part is an essential component of the vehicle's braking system, and its failure can result in poor stopping performance or even safety concerns. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this Dorman wheel cylinder.

Pros:

1. OEM-equivalent design: The Dorman wheel cylinder is engineered to meet the original equipment specifications, ensuring a precise fit and optimal performance.

2. High-quality materials: Dorman uses premium materials in the manufacturing process to ensure durability and resistance to corrosion.

3. Affordability: Compared to genuine OEM parts, the Dorman wheel cylinder offers a more cost-effective solution without compromising on quality.

4. Wide availability: Dorman is a leading aftermarket automotive parts manufacturer, making their products readily available at various auto parts stores and online retailers.

Cons:

1. Potential for minor fitment issues: Although the Dorman wheel cylinder is designed to be a direct replacement, some customers have reported minor fitment challenges, which may require additional labor and adjustments.

2. Limited warranty: Dorman offers a limited warranty on their parts, which may not cover certain damages or failures that could occur.

3. Installation complexity: Installing the wheel cylinder can be a more complex process than some other repairs, requiring specialized tools and knowledge.

Conclusion:

The Dorman First ATS20240129A3949-AO Rear Drum Brake Wheel Cylinder is a reliable and cost-effective option for Pontiac Trans Sport owners seeking to replace their failing wheel cylinder. Its OEM-equivalent design, high-quality materials, and wide availability make it an attractive choice. However, potential customers should be aware of the minor fitment issues and the limited warranty that come with this part. Ultimately, if you value affordability and performance, this Dorman wheel cylinder is a solid recommendation for your Pontiac Trans Sport.

Details:

1992 - 2004 oldsmobile silhouette bore: 15/16 in. New list item. 2pcs rear drum brake wheel cylinder for Pontiac trans sport 1992 -1998, item specifics: bore size: 0.938 in. 1992 - 1995 buick lesabre bore: 15/16 in.

1997- 2005 chevrolet venture bore: 15/16 in.

specifications wheellinders:

  • for makes: Pontiac
  • for years: 1992–1998
  • brand: Dorman First Stop
  • mpn: Atsp20240129a3949-ao
  • bore size: 0.938 In.
  • brake component inlet thread size: M10 X 1.0
  • part type: Drum Brake Wheel Cylinder
  • package included: 2 Rear Drum Brake Wheel Cylinder
  • category: Wheel Cylinders Parts
  • placement on vehicle: Rear
  • ipn: 784-44022
  • oe/oem part number: 1999 2000 2001 2002 2003 2004 2005 Pontiac Montana 3.4l 3.5l V6, 1992 1993 1994 1995 Oldsmobile 88 3.8l V6, 1991 1992 1993 1994 1995 Oldsmobile 98 3.8l V6, 1991 1992 1993 1994 1995 Pontiac Bonneville 3.8l V6, 1992 1993 1994 Chevrolet Lumina Apv 3.1l 3.8l V6, 1991 1992 Cadillac Fleetwood 4.9l V8, 1991 1992 1993 Cadillac Deville 4.9l V8, 1991 1992 1993 1994 1995 Buick Park Avenue 3.8l V6, 1992 1993 1994 1995 Buick Lesabre 3.8l V6, Limited, Sse, Warner, Le, 60, Premiere, Lt, Montana, Spring, Royale, Sv6, Gl, Plus, Se, Gs, Base, Regency, Custom, Value
  • california prop 65 warning: Warning

offer wheellinders:

  • started: december 5, 2025
  • prices: $32.75–$48.78
  • item condition: New
  • availability: in stock
  • sold #: 24
  • options: ship-to-home

returns wheellinders:

  • policy: returns accepted
  • time: 30 days
  • paid by: seller

seller wheellinders:

  • rating: 97.4%
  • city: us
  • # reviews: 254

general wheellinders:

  • category: Auto Parts > Car Truck Accessories > Brakes > Wheel Cylinders

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shipping wheellinders:

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  • transit: 3-6 days
  • type: fixed
rating: 97.4% out of 100 based on 254 user ratings.
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