1. Automatic Transmissions Products
  2. sku: 22962029335952853
  3. CADILLAC 400-10370

CADILLAC 400-10370 Transmission 3.6L

fits model: Ct6. make: Cadillac. year: 2018.

400-10370 Cadillac Transmission 3.6l Fits 18 Ct6 673950

( Part Type: Transmission ), ( Conditions Options: 4wd Prod Date ), ( Genuine Oem: Yes ), ( Ipn: 400-10370 ), ( Manufacturer Warranty: 6 Month )

Review CADILLAC Transmission 3.6l fits CT6 2018

The **Cadillac 400-10370 3.6L 18-Speed CT6 Automatic Transmission** is a high-performance, precision-engineered powerhouse designed to deliver seamless, responsive shifting and unmatched durability for the most demanding driving applications. Built to Cadillac s legendary standards of craftsmanship, this transmission is a refined evolution of the iconic CT6 series, optimized for modern high-performance vehicles while maintaining the reliability and smoothness that Cadillac drivers expect. The **18-speed automatic transmission** incorporates advanced hydraulic and electronic controls, ensuring lightning-fast, precise gear selections that adapt effortlessly to varying driving conditions whether cruising on the highway, navigating city traffic, or tackling spirited acceleration. Its **3.6-liter supercharged V6 engine pairing** (or compatible high-performance applications) benefits from a transmission system engineered for optimal torque conversion, minimizing lag and maximizing power delivery, making it ideal for both luxury sedans and high-performance models.

At the heart of this transmission lies a **robust planetary gearset** with a **torque converter featuring a multi-plate clutch system**, allowing for near-instantaneous shifts and a near-flawless driving experience. The **10370 model designation** indicates a specific variant tailored for high-torque applications, featuring reinforced internal components such as the **input shaft, output shaft, and reverse idler gear**, all machined from high-grade alloy steel to withstand extreme loads without compromising smoothness. The **hydraulic valve body** is meticulously calibrated to provide optimal shift quality, while the **electronic control module (ECM)** integrates seamlessly with the vehicle s powertrain control system, enabling adaptive shift logic that anticipates driver intent and adjusts shift points dynamically for efficiency and performance.

For enhanced longevity and protection, the **CT6 transmission** incorporates a **multi-stage torque converter lockup system**, reducing parasitic drag and improving fuel economy without sacrificing responsiveness. The **sealed planetary carrier and precision-balanced gears** minimize friction and wear, while the **high-capacity fluid pump** ensures consistent pressure across all operating conditions. This transmission is also designed with **advanced shift solenoids** that regulate valve body operation with millisecond precision, eliminating harsh or erratic shifts. Whether installed in a **Cadillac CT6, Escalade, or other high-performance applications**, this transmission delivers a **silky-smooth, near-manual-like shift feel** while maintaining the robustness required for heavy-duty towing, high-speed cruising, and aggressive acceleration.

Built to **Cadillac s stringent quality standards**, the **400-10370 transmission** undergoes rigorous testing for durability, including **high-cycle fatigue testing, extreme temperature simulations, and torque endurance checks**, ensuring it can handle the most punishing driving scenarios. The **sealed-for-life gear oil pump** and **high-performance transmission fluid system** further extend service intervals, reducing maintenance requirements while maintaining peak performance. Whether used in a **luxury sedan, a high-performance muscle car, or a heavy-duty SUV**, this transmission exemplifies Cadillac s commitment to **excellence in automotive engineering**, blending cutting-edge technology with timeless reliability to provide a driving experience that is as refined as it is powerful.

### Cadillac CTS-V (2010-2014) with the 6.2L V8 (CT6) and 10370 Transmission (6-speed automatic)

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#### **Pros:** 1. **Power and Performance:**

The 6.2L LT4 V8 engine produces **432 horsepower and 430 lb-ft of torque**, delivering strong acceleration and a thrilling driving experience. This engine is a direct evolution of the LS3 and is known for its reliability when maintained properly.

2. **Smooth Transmission:**

The **6-speed automatic transmission (10370)** is a robust unit designed for high-performance applications. It handles power well and, when properly serviced, can last a long time. Unlike some older transmissions, this one is less prone to slippage or harsh shifts when kept in good condition.

3. **Luxury and Comfort:**

The CTS-V is a luxury coupe with high-quality interior materials, comfortable seating, and refined ride handling. The cabin is spacious for a coupe, and the build quality is generally solid for a Cadillac of this era.

4. **Reliability (with proper maintenance):**

The LT4 engine is known for its durability if it receives regular oil changes (every 5,000 miles or as recommended) and other basic maintenance. Many examples with high mileage run well if cared for.

5. **Aftermarket Support:**

The CTS-V has a strong aftermarket community, with parts like exhaust systems, suspension upgrades, and performance chips readily available. Tuning options (like Haltech or AEM) can further enhance power and drivability.

6. **Classic Styling:**

The CTS-V s aggressive, muscular design remains iconic and is highly sought after by enthusiasts. It s a great choice for those who appreciate a blend of luxury and sportiness.

7. **Potential for Modifications:**

The platform allows for upgrades like cold air intakes, performance exhausts, and suspension tuning, making it a fun project car for those who enjoy working on their vehicles.

---

#### **Cons:** 1. **High Maintenance Costs:**

While the LT4 engine is reliable, it is a high-performance V8 that requires **premium fuel (91 octane)** and **expensive parts** if something fails. Oil changes should be done frequently to prevent sludge buildup, which can lead to costly engine damage.

2. **Transmission Issues (if neglected):**

The 6-speed transmission can develop problems if not serviced properly. Common issues include **slippage, rough shifting, or failure of the torque converter** especially if fluid hasn t been changed. Some owners report needing to replace the transmission fluid every **30,000 50,000 miles** for longevity.

3. **Rust Concerns:**

Many CTS-Vs from this era (especially those from the Midwest or northern regions) suffer from **rust**, particularly on the lower control arms, subframe, and wheel wells. A thorough inspection is critical before purchasing.

4. **Luxury Wear and Tear:**

The interior, while high-quality, can show signs of aging (e.g., cracked leather, worn-out seats) if the car has high mileage. Some electronics (like the radio or climate controls) may also be outdated or unreliable.

5. **Fuel Economy:**

The V8 drinks fuel expect **around 14 16 MPG in the city and 20 22 MPG on the highway**. This is not ideal for daily driving if fuel costs are a concern.

6. **Depreciation:**

While the CTS-V holds its value better than many luxury cars, it is still not a high-resale-value vehicle. If you plan to sell it later, you may not recoup as much as you spent.

7. **Weight:**

The CTS-V is heavy (around **3,800 4,000 lbs**), which can make it less nimble in tight corners compared to lighter sports cars. Handling is improved with aftermarket suspension upgrades, but stock ride height can feel sluggish.

8. **Electrical Gremlins:**

Some models from this era have had issues with **electrical components**, such as faulty sensors or wiring harnesses. A pre-purchase inspection should check for these problems.

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### **Ending Conclusion:**

The **2010 2014 Cadillac CTS-V with the 6.2L V8 and 10370 transmission** is a fantastic choice for enthusiasts who prioritize **performance, luxury, and driving enjoyment** provided it is well-maintained. It offers a **thrilling V8 experience** with a smooth transmission when cared for, but it comes with **higher maintenance costs, potential rust issues, and fuel inefficiency**. If you are prepared for the upkeep and enjoy working on (or tuning) your car, this is a fantastic project or daily driver. However, if you seek a **low-maintenance, fuel-efficient luxury car**, there are better options.

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### **Recommendation:** - **Buy if:**

- You have **mechanical experience** or are willing to invest in maintenance (oil changes, transmission fluid, rust repairs).

- You **love V8 power** and don t mind higher fuel costs.

- You plan to **modify or tune** the car for better performance.

- You find a **low-mileage example (under 60,000 miles) with full service records**, preferably from a **rust-free region** (e.g., Southern California, Florida, or the Southwest).

- You re okay with **higher insurance costs** (CTS-Vs are expensive to insure).

- **Avoid if:**

- You want a **low-maintenance, daily driver** with good fuel economy.

- You **can t afford unexpected repairs** (engine, transmission, or electrical issues).

- You **don t enjoy working on your car** or don t have access to a mechanic.

- The car has **high mileage (over 100,000 miles) without full service history**.

- You **can t inspect it thoroughly** for rust, transmission condition, or electrical issues.

**Final Verdict:** If you re a **performance enthusiast** who appreciates a **luxury muscle car**, the CTS-V is an excellent purchase **but only if you re committed to keeping it in top shape**. For casual buyers or those seeking reliability, consider alternatives like a **LS-based V8 sedan (e.g., Camaro SS, Chevy Impala SS)** or a **turbocharged luxury car** (e.g., BMW M3, Audi S5) for a more balanced experience.

Details:

Items marked Sold AS-IS are final sale with no warranty. Useful Links. They will not have any packaging included. This Transmission 3.6L Fits 18 CT6 673950 was removed from a 2018.

Daytime phone number is required load will not deliver until appointment scheduled. Install new spark plugs wires. NOTE: Image shown may be the vehicle from which, part was pulled, or a generic image representing, typical stock, rather than unique item being sold. Warranty Information:: Please review the listing for specific warranty details.

Fill transmission with manufacturer specified fluid. An adult over 18 must be present for delivery. Flush and inspect cooling lines. Install new belts and hoses.

Replace all seals. Residential Address:Curbside delivery only. Scan, record and clear all codes before removing the original unit. Some listings include a warranty and others do not.

Replace oil pan gasket and rear main seal. Used tires are not tested or labeled by MAS to meet any safety standards. This 2018 CT6 has a lot of great parts we now have in stock. If needed, replace timing gears, chains or belts gaskets.

Replace thermostat gasket. All other parts included are considered accessories or extra. Adjust throttle position sensor cable. Items will not be released without it.

Flush cooling system re-fill to proper level. Replace valve cover gaskets. Buyer accepts all risk of damages/injuries if not installed properly. Differentials: All internal lubricated parts within the drive axle housing are guaranteed in good working condition at time of purchase.

A daytime phone number is required to schedule the delivery. And engage torque converter into front pump. Drain and replace engine oils to manufacture suggested levels. Scan, record and clear all codes before removing original unit.

Airbags are not tested to meet any safety standards. Replace oil, air and fuel filters. Install new filter kit. Airbags must be installed in accordance with vehicle manufacturers specifications.

Transmissions: are warrantied to be in good working order against any slippage or shifting failures.

specifications autotransmissionsgo:

  • for models: Ct6
  • for makes: Cadillac
  • for years: 2018
  • part type: Transmission
  • conditions options: 4wd Prod Date
  • genuine oem: Yes
  • ipn: 400-10370
  • manufacturer warranty: 6 Month

returns autotransmissionsgo:

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

payments autotransmissionsgo:

  • wallet: Paypal
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  • credit card: Mastercard

general autotransmissionsgo:

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

shipping autotransmissionsgo:

  • service: Flat Rate Freight
  • cost: $0.00
  • class: Freight
  • type: Fixed

offer autotransmissionsgo:

  • options: Ship-to-home
  • quantity: 1
  • best offers: True
  • started: February 25, 2026
  • availability: In Stock
  • sold: 0

seller autotransmissionsgo:

  • # reviews: 4794
  • rating: 98.9%
  • city: Camden, New Jersey
for models: ct6, for makes: cadillac, for years: 2018, part type: transmission, conditions options: 4wd prod date, genuine oem: yes, manufacturer warranty: 6 month,
manufacturer: cadillac, category: auto parts > car truck parts accessories > transmission drivetrain > automatic transmission, sku: 22962029335952853,
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