GMC TRUCK SIERRA150 Transmission 242.GM9M08

( Brand: Gmc Truck ), ( Manufacturer Part Number: SIERRA150 ), ( Part Type: Transmission ), ( Conditions Options: Floor Transfer Case ), ( Genuine Oem: Yes ), ( Ipn: 242.gm9m08 ), ( Manufacturer Warranty: 90 Day )

Review GMC TRUCK Transmission Shift fits 2008

The GMC Sierra 1500 2008 Transmission, specifically model number 242.Gm9m08, is a crucial component of your vehicle's powertrain system. This transmission is a part of the 4L60-E family, which is a series of automatic transmissions produced by General Motors.

The 242.Gm9m08 transmission is a four-speed automatic transmission, designed to deliver smooth and efficient power transfer from the engine to the wheels. It features a torque converter lock-up clutch that engages at low engine speeds, providing improved fuel economy and engine performance by reducing power loss through the torque converter.

The transmission's four forward gears offer a good balance between acceleration and fuel economy. The first gear is ideal for low-speed situations, such as towing or heavy acceleration. The second and third gears provide sufficient power for cruising at moderate speeds. The fourth gear is an overdrive gear, which reduces engine RPM at highway speeds, resulting in reduced engine noise and improved fuel economy.

This transmission also features a planetary gear set and hydraulic system, which work together to manage the engagement and disengagement of the gears. The hydraulic system uses pressure from the engine's power steering system to operate the transmission's shift mechanism.

The 242.Gm9m08 transmission is built with durability in mind. It utilizes robust materials and components, such as cast iron gears and hardened steel synchronizers. These components help to minimize wear and tear, ensuring a long service life for the transmission.

It is important to note that maintaining the proper transmission fluid level and using the correct transmission fluid type is essential for the longevity and performance of the 242.Gm9m08 transmission. Regular transmission maintenance, such as changing the transmission filter and fluid, can help prevent costly repairs and extend the life of the transmission.

In summary, the GMC Sierra 1500 2008 Transmission 242.Gm9m08 is a robust, four-speed automatic transmission designed for smooth and efficient power transfer in your vehicle. Its features include a torque converter lock-up clutch, a planetary gear set, and a hydraulic system, all working together to deliver optimal performance and fuel economy. Proper maintenance is essential to ensure the longevity and peak performance of this transmission.

The GMC Sierra 1500 2008 with the 242.GM9M08 transmission is a popular choice for those seeking a reliable and powerful full-size pickup truck. Like any automotive component, this transmission has its pros and cons. Here's a detailed analysis:

1. Durability: The Allison 1000 series transmissions, including the 242.GM9M08, are well-known for their robustness and longevity. Many users have reported driving their trucks for over 200,000 miles without significant transmission issues.

2. Smooth Shifting: The 242.GM9M08 transmission offers smooth and consistent shifts, making for a pleasant driving experience. This is especially noticeable during highway cruising and when towing heavy loads.

3. Towing Capacity: The transmission's impressive towing capacity allows the GMC Sierra 1500 to handle heavy loads with ease. This makes it a popular choice for contractors, landscapers, and other professionals who require a powerful and versatile work vehicle.

4. Fuel Efficiency: Compared to other full-size pickup trucks with similar capabilities, the 242.GM9M08 transmission offers relatively good fuel economy. This can help save money on gas costs over the long term.

1. Cost: The Allison 1000 series transmissions, particularly those used in older trucks like the 2008 GMC Sierra 1500, can be quite expensive to purchase and install. This is due to their complex design and the high demand for rebuilt or remanufactured units.

2. Maintenance: The 242.GM9M08 transmission requires regular maintenance to ensure optimal performance and longevity. This includes changing the transmission fluid and filter at recommended intervals. Failure to do so can result in costly repairs down the line.

3. Complex Design: The Allison 1000 series transmissions are known for their complex design, which can make repairs more challenging and costly. This is especially true for DIY enthusiasts who may not have the necessary expertise and tools to work on the transmission themselves.

4. Size: The size of the 242.GM9M08 transmission can make it difficult to install in some applications. This is particularly true for those who are working in tight spaces or vehicles with limited clearance.

In conclusion, the GMC Sierra 1500 2008 with the 242.GM9M08 transmission offers several advantages, including durability, smooth shifting, impressive towing capacity, and relatively good fuel economy. However, it also comes with some drawbacks, such as high cost, regular maintenance requirements, complex design, and size.

Based on this analysis, the decision to buy a GMC Sierra 1500 2008 with the 242.GM9M08 transmission ultimately depends on your specific needs and budget. If you require a powerful and versatile work vehicle and have the financial resources to cover the upfront cost and ongoing maintenance, then this transmission may be an excellent choice for you. On the other hand, if you're on a tight budget or prefer a more low-maintenance option, you might want to consider alternative transmissions or vehicles.

Details:

part #: sierra150 prices

• $101.00-$119.95

specifications geashif:

• for makes: Gmc
• for years: 2008
• brand: Gmc Truck
• mpn: Sierra150
• part type: Transmission
• conditions options: Floor Transfer Case
• genuine oem: Yes
• ipn: 242.gm9m08
• manufacturer warranty: 90 Day

shipping geashif:

• class: Expedited
• type: Fixed
• service: USPS Priority Mail
• carrier: USPS
• cost: $0.00
• transit: 3-7 Days

payments geashif:

• other
• credit card: Visa
• wallet: Apple-pay

seller geashif:

• city: Denver, Colorado
• # reviews: 2339
• rating: 97.6%

offer geashif:

• best offers: True
• quantity: 1
• options: Ship-to-home
• started: December 30, 2025
• availability: In Stock
• sold: 0

returns geashif:

• paid by: Buyer
• policy: Returns Accepted
• time: 60 Days

general geashif:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Shifters, Cables Linkages

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