CADILLAC 24284259 Automatic Transmission Gearbox 8L45

( Manufacturer Part Number: 24284259 ), ( Type: Automatic Transmission ), ( Vintage Part: No )

Review CADILLAC Speed Automatic Transmission Gearbox Oem fits CT4 AWD 2020–2023

The **Cadillac 24284259 2020-2023 CT4 AWD Automatic Transmission Gearbox (8L45)** is a high-performance, eight-speed automatic transmission engineered for the iconic **CT4** luxury sports sedan, delivering a seamless blend of precision engineering and cutting-edge automotive innovation. Designed to complement the CT4 s dynamic AWD (All-Wheel Drive) system, this transmission ensures effortless power delivery while maintaining the vehicle s sporty handling and refined driving experience. The **8L45** is a sophisticated evolution of General Motors advanced transmission technology, featuring a compact yet robust design that optimizes space efficiency within the CT4 s sleek chassis. With its **eight forward gears**, this transmission provides a wide range of torque multiplication options, allowing the CT4 s twin-turbocharged **3.5L EcoTec3 V6 engine** (producing up to **404 horsepower and 369 lb-ft of torque**) to operate at peak efficiency across all driving conditions whether cruising on the highway, accelerating from a standstill, or navigating tight corners with precision.

At its core, the **8L45** employs **GM s 8-speed automatic transmission architecture**, which incorporates a **wet dual-clutch system** paired with a **planetary gearset** for smooth, rapid shifts without the traditional lag associated with traditional torque converters. This design enhances both responsiveness and fuel economy, making it ideal for the CT4 s performance-oriented yet practical nature. The transmission s **adaptive shift logic** continuously monitors driving dynamics, adjusting shift points in real time to optimize power delivery, reduce wear, and improve overall efficiency. Additionally, the **8L45** integrates **GM s Hydra-Matic technology**, which includes features like **torque converter lockup** for improved fuel economy and **quick-shift capability** to minimize shift times, ensuring a near-instantaneous response when accelerating.

For the **AWD CT4**, the **8L45** works in tandem with Cadillac s **IntelliLink infotainment system** and **Super Cruise hands-free driving assist** to provide a futuristic yet intuitive driving experience. The transmission s **seamless integration with the AWD system** ensures that power is distributed dynamically between the front and rear axles, enhancing traction, stability, and cornering grip without compromising the driver s engagement with the vehicle. The **8L45** also incorporates **advanced cooling and lubrication systems**, including a **high-capacity transmission cooler** and **synthetic-based transmission fluid**, to maintain optimal operating temperatures even under heavy loads, extending the lifespan of the gearbox and reducing the risk of overheating.

Under the hood, the **8L45** is built to withstand the demands of both daily driving and spirited performance, featuring **high-strength steel and aluminum components** for durability and weight reduction. The transmission s **compact footprint** allows for a more refined cabin space, contributing to the CT4 s luxurious yet sporty interior. Whether paired with the **CT4 s standard 8-speed automatic** or upgraded with **performance-oriented tuning**, this gearbox ensures that every drive is characterized by **smooth, predictable shifts, exceptional torque delivery, and the kind of refined power that defines Cadillac s luxury performance segment**. Ideal for enthusiasts seeking a balance of **technology, performance, and reliability**, the **2020-2023 CT4 AWD 8L45 transmission** represents the pinnacle of modern automatic transmission engineering, designed to elevate the driving experience to new heights.

### **Pros and Cons of Buying a 2020 2023 Cadillac CT4 AWD with the 8L45 8-Speed Automatic Transmission (VIN 24284259)**

#### **Pros**

1. **Premium Luxury Brand** Cadillac is a well-established luxury automaker with strong resale value, brand prestige, and a reputation for comfort and refinement. The CT4 offers a sporty yet upscale driving experience.

2. **Strong Engine and Transmission** The CT4 typically comes with a **2.0L turbocharged inline-4 engine** (or a **3.0L V6** in higher trims) paired with the **8L45 8-speed automatic transmission**, which is smooth, reliable, and well-suited for both city and highway driving. The AWD system provides better traction in adverse conditions.

3. **Comfortable and Quiet Cabin** The CT4 is known for its well-insulated cabin, reducing road noise and vibrations. The seats are supportive, and the interior materials (especially in higher trims) are high-quality, offering a premium feel.

4. **Modern Tech Features** The CT4 includes a **large touchscreen infotainment system** (with wireless Apple CarPlay and Android Auto), available **head-up display**, **surround-view camera**, and **adaptive cruise control** (in higher trims). The **CT4-V (V6 model) also offers a more powerful engine** for better acceleration.

5. **AWD Capability** The **AWD system** improves handling in snow, rain, or off-road-like conditions, making it a practical choice for drivers who need extra stability without the bulk of a full-size SUV.

6. **Good Fuel Economy (for a Luxury Coupe)** The **2.0L turbo engine** (non-V6) achieves around **20 22 MPG combined**, which is decent for a luxury car of its class. The V6 model is slightly less efficient ( 18 20 MPG combined).

7. **Sporty Handling** The CT4 has a **shorter wheelbase** than many luxury sedans, giving it a more agile and engaging driving experience. The AWD version enhances cornering grip and stability.

8. **Low-Mileage Options Available** Since the CT4 is a newer model (2020 2023), you may find **well-maintained, low-mileage examples** with full service histories, especially if buying from a dealership or private seller with documentation.

9. **Resale Value** Cadillac s resale holds up reasonably well, especially for the CT4, which remains a popular luxury coupe. The AWD version may retain value slightly better due to its versatility.

10. **Customization Options** Higher trims (like the **CT4-V Blackwing** or **CT4-V Sport Leather**) offer **unique styling, performance upgrades, and premium features** that can be appealing to enthusiasts.

---

#### **Cons**

1. **Reliability Concerns (Early Models)** Some **2020 2021 CT4 models** have reported **transmission issues** (jerking, delayed shifts) with the **8L45 8-speed automatic**, particularly in colder climates. Cadillac has issued **recalls and software updates** to address these problems, but **pre-purchase inspections are crucial**.

2. **Turbocharged Engine Reliability** The **2.0L turbo engine** (common in base CT4 models) has had **oil dilution and turbo failure issues** in some cases, especially in cold weather. The **V6 engine (CT4-V) is more robust** but still requires proper maintenance.

3. **High Maintenance Costs** As a luxury brand, **Cadillac parts and labor are expensive**. Regular oil changes, transmission fluid flushes, and potential turbo repairs can add up quickly.

4. **Limited Cargo Space** The CT4 is a **coupe**, meaning it has **minimal rear cargo space** (around **8.9 cu. ft.**). If you need to carry large items frequently, this could be a drawback.

5. **AWD Adds Weight and Cost** The **AWD system increases weight**, which can slightly reduce fuel efficiency and handling responsiveness. Additionally, AWD models may have **higher purchase prices** and **more complex drivetrain components** to maintain.

6. **Depreciation Risk** While Cadillac s resale holds better than some luxury brands, the **CT4 still depreciates significantly** over time. If you plan to keep it long-term, factor in potential **lower long-term value** compared to German or Japanese luxury brands.

7. **Limited Practicality for Families** The **two-door coupe design** makes it **less practical for families or frequent passengers**. The **CT5 (sedan) or CT6 (extended sedan) may be better choices** if you need more space.

8. **Potential Software Glitches** Early models of the CT4 s **infotainment system** have had **occasional lag or connectivity issues**. While updates have improved this, it s something to consider if you rely heavily on tech features.

9. **Higher Insurance Costs** As a luxury vehicle, **insurance premiums will be higher** than for a comparable non-luxury car.

10. **Market Availability and Pricing** Due to **supply chain issues and production delays**, some **2020 2023 CT4 models may be harder to find at competitive prices**. Buying used could mean **higher upfront costs** compared to newer luxury alternatives.

---

### **Key Considerations Before Buying**

1. **Transmission Health** If buying used, **get a pre-purchase inspection (PPI) focused on the 8L45 transmission**. Look for **jerking, delayed shifts, or error codes** (P0740, P0741, P0742 related to torque converter issues). A **transmission fluid flush** may be needed if it hasn t been done recently.

2. **Maintenance Records** Ensure the car has **regular oil changes (every 5,000 7,500 miles)** and **timely service updates**. The **turbo engine requires high-quality synthetic oil** to prevent issues.

3. **Test Drive for Comfort & Handling** Since the CT4 is a **coupe**, check if the **seats are comfortable for long drives** and if the **AWD system engages smoothly**. Test **acceleration, braking, and cornering** to ensure no unusual vibrations or noises.

- **BMW 4 Series (Gran Coupe)** More refined, better resale.

- **Audi A5 (S Line)** Stronger engine options, Quattro AWD.

- **Lexus RC (F Sport)** Reliable, great warranty, but less sporty.

- **Genesis G70 (AWD)** More affordable luxury coupe with AWD.

5. **Financing & Depreciation** Cadillac s **financing rates can be high**, and the car may **lose value faster** than some competitors. If possible, **pay cash or secure a low-interest loan** to mitigate long-term costs.

---

### **Final Recommendation**

You prioritize **luxury, sporty handling, and AWD capability** over practicality.

You find a **well-maintained example with clean service records** and a **pre-purchase inspection confirms transmission reliability**.

You re okay with **higher maintenance costs** and **depreciation** in exchange for a **premium driving experience**.

You prefer a **coupe over a sedan or SUV**, and cargo space isn t a major concern.

The **V6 (CT4-V) model** is available, as it offers **better power and reliability** than the turbocharged 2.0L.

You **need a practical, family-friendly vehicle** (consider a CT5 or CT6 instead).

You **can t afford potential transmission or turbo issues** (budget for **$1,500 $3,000 in unexpected repairs**).

You **won t drive it often** (luxury cars depreciate faster when not used regularly).

You **prefer a brand with better long-term reliability** (e.g., Lexus, Genesis, or BMW).

---

### **Best Approach to Buying**

1. **Start with a trusted dealer** (e.g., Cadillac Certified Pre-Owned) for **extended warranties and inspections**.

2. **Consider a private sale only if you have a mechanic inspect it thoroughly**.

3. **Negotiate based on market value** check **Kelley Blue Book, Edmunds, and local listings** to ensure a fair price.

4. **Budget for maintenance** set aside **$1,000 $2,000 annually** for upkeep beyond basic services.

5. **Test drive in different conditions** (city, highway, wet roads) to confirm **AWD performance and transmission smoothness**.

**Final Verdict:** The **2020 2

Details:

BODY TYPE: PREMIUM LUXURY SEDAN 4-DOOR. TRANSMISSION: 8 SPEED AUTOMATIC TRANSMISSION 8L45. MILEAGE: 40K MILEAGE. DONOR VEHICLE: 2020 CADILLAC CT4 350T.

part #: 24284259 prices

• $349.99-$1578.49

specifications autotransmissionsgo:

• for models: Ct4, Awd
• for makes: Cadillac
• for years: 2020-2023
• mpn: 24284259
• type: Automatic Transmission
• vintage part: No

payments autotransmissionsgo:

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

seller autotransmissionsgo:

• # reviews: 44867
• city: Grawn, Michigan
• rating: 99.9%

offer autotransmissionsgo:

• best offers: True
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: February 19, 2026
• sold: 0

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

returns autotransmissionsgo:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

shipping autotransmissionsgo:

• cost: $350.00
• service: Economy
• transit: 4-9 Days
• class: Economy
• type: Fixed

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