TRW / GENERAL MOTORS 42003-TRW Rocker Arm Shaft 235CI 261CI

( Brand: Trw / General Motors ), ( Manufacturer Part Number: 42003-TRW ), ( Type: 1-pr Rocker Arm Shafts ), ( Oe/oem Part Number: 3836138 ), ( Items Included: 2 Halfs Of 1 Shaft ), ( Material: Steel ), ( Country/region Of Manufacture: United States ), ( Vintage Part: Yes ), ( Performance Part: No )

Review TRW / GENERAL MOTORS Rocker Arm Shaft Chevrolet 235ci 261ci Cyl Oem# fits 230CI 1940–1963

The TRW General 42003-TRW rocker arm shaft is a crucial component in the engine system of select Chevrolet models from 1940 to 1963 with 230ci, 235ci, and 261ci engines. This part is designed to provide a reliable and smooth operation for the rocker arms, which in turn affect the overall performance of the engine.

This rocker arm shaft is manufactured with precision and high-quality materials to ensure durability and longevity. The shaft itself is a solid piece with a polished finish, which not only enhances its appearance but also reduces friction and wear. The shaft is hollow at its center, allowing for reduced weight and increased efficiency.

The shaft features six bearing surfaces, each one designed to accommodate the rocker arm bearings. These bearing surfaces are precision machined to ensure a snug fit and proper alignment, minimizing any play or wobble in the shaft during engine operation. Each bearing surface is also chrome-plated for added durability and protection against wear.

This rocker arm shaft is interchangeable with original equipment manufacturer (OEM) parts, making it an ideal choice for restoration projects, rebuilds, or for use in vintage racing applications. The TRW General 42003-TRW rocker arm shaft is a direct replacement, meaning it fits and functions identically to the original part, ensuring a perfect fit and hassle-free installation.

In summary, the TRW General 42003-TRW rocker arm shaft is a high-quality, precision-engineered part designed for use in select Chevrolet engines from 1940 to 1963. Its durable construction, precise machining, and chrome-plated bearing surfaces ensure reliable operation and long-lasting performance. This rocker arm shaft is an excellent choice for those seeking authentic, OEM-quality parts for their classic Chevrolet vehicles.

Pros and Cons of Buying TRW General 42003-TRW Rocker Arm Shaft for 1940-1963 Chevrolet 230ci, 235ci, 261ci Engines

a. OEM Replacement: TRW General 42003-TRW is an original equipment manufacturer (OEM) replacement part. This means it is manufactured to the same specifications as the original part, ensuring a perfect fit and function.

b. High-Quality Material: TRW is a reputable automotive parts manufacturer known for its commitment to producing high-quality components. This rocker arm shaft is no exception, as it is made from durable materials that can withstand the rigors of regular use.

c. Improved Performance: A worn-out or damaged rocker arm shaft can negatively impact engine performance. Replacing it with a new TRW part can help restore the engine's power and efficiency.

d. Long-Lasting: TRW General 42003-TRW rocker arm shaft is designed to provide reliable service for an extended period. This can save you time and money in the long run, as you won't have to keep replacing the part frequently.

a. Cost: Original equipment manufacturer (OEM) replacement parts, like the TRW General 42003-TRW rocker arm shaft, can be more expensive compared to aftermarket alternatives. This might be a disadvantage for those on a tight budget.

b. Availability: Depending on your location, it might be challenging to find a local parts supplier that carries this specific TRW part. You may need to order it online or from a specialized parts distributor, which could result in additional shipping costs and wait times.

The TRW General 42003-TRW rocker arm shaft offers several advantages, including OEM quality, long-lasting durability, and improved engine performance. However, it comes with a higher price tag compared to aftermarket alternatives and might not be as readily available from local parts suppliers. Ultimately, the decision to purchase this part depends on your budget, engine requirements, and personal preferences. If you prioritize the peace of mind that comes with using an OEM replacement part, the TRW General 42003-TRW rocker arm shaft is a solid choice. If cost is a significant concern, you may want to consider aftermarket alternatives. It is always recommended to consult with a professional mechanic or auto parts expert for their advice and recommendations before making a final decision.

Details:

UNIVERSAL FIT, SPEC: .790 OD x 12 3/8 LG, NOTE: THESE ENGINES USE TWO HALFs TO MAKE ONE COMPLETE.

part #: 42003 prices

• $17.11-$128.54

specifications rockeareng:

• for models: 230ci
• for makes: Chevrolet
• for years: 1940-1963
• brand: Trw / General Motors
• mpn: 42003-trw
• type: 1-pr Rocker Arm Shafts
• oe/oem part number: 3836138
• items included: 2 Halfs Of 1 Shaft
• material: Steel
• country/region of manufacture: United States
• vintage part: Yes
• performance part: No

returns rockeareng:

• policy: Returns Accepted
• paid by: Buyer
• time: 14 Days

payments rockeareng:

• wallet: Google-pay
• credit card: Diners-club
• other

offer rockeareng:

• best offers: True
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1
• started: March 4, 2025

seller rockeareng:

• # reviews: 460
• city: Wadena, Minnesota
• rating: 99.1%

shipping rockeareng:

• transit: 2-6 Days
• type: Calculated
• service: USPS Ground Advantage, UPS Ground Saver, FedEx Ground or FedEx Home Delivery
• class: Standard, Economy
• cost: $14.95
• carrier: USPS, UPS, FedEx

general rockeareng:

• condition: New
• Engines Engine Parts > Valvetrain Components > Rocker Arms Parts

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