AUDI 0CJ-300-042-001 Transmission

( Manufacturer Part Number: 0CJ-300-042-001 ), ( Part Type: Transmission ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included ), ( Replaces Part Number: 0cj-300-041-p-004 )

Review AUDI Genuine Transmission

The **Audi 0CJ-300-042-001 Transmission** is a high-performance, precision-engineered automatic transmission designed exclusively for Audi s high-end vehicle lineup, including models like the S5, S6, and RS6, ensuring seamless power delivery and exceptional driving dynamics. This transmission represents the pinnacle of Audi s **Tiptronic S** technology, a refined evolution of their legendary Tiptronic system, tailored for sports sedans and luxury coupes that demand both responsiveness and sophistication. Built with Audi s signature attention to detail, the 0CJ-300-042-001 incorporates a **7-speed dual-clutch architecture**, combining the efficiency of a conventional automatic with the rapid shifting prowess of a manual transmission, all while maintaining the smooth, near-instantaneous gear changes that Audi drivers expect. The transmission s compact yet robust design integrates a **torque converter with lock-up clutch**, optimizing fuel economy and reducing heat buildup under heavy loads, while its **adaptive shift logic** continuously recalculates optimal gear ratios based on driving conditions, throttle input, and vehicle speed for a dynamically engaging yet comfortable ride.

Under the hood, the 0CJ-300-042-001 is constructed from a blend of **high-strength steel, aluminum, and advanced composite materials**, ensuring durability without sacrificing weight savings. The transmission s **wet dual-clutch system** employs two separate clutches one for odd gears and another for even gears operating in tandem with a sophisticated hydraulic and electronic control module to achieve lightning-fast shifts, often completing gear changes in under **100 milliseconds**. This level of precision is further enhanced by Audi s **MMI (Multi Media Interface) integration**, allowing drivers to manually select gears via the steering wheel-mounted paddles or the center console, while the transmission s **adaptive learning algorithm** memorizes driver preferences to anticipate shifts before they re explicitly requested. The 0CJ-300-042-001 also features **Audi s Shift Control System**, which can be adjusted between "Comfort," "Dynamic," and "Sport" modes, tailoring the shift feel to match the driver s intent whether for a relaxed cruise or aggressive overtaking.

One of the standout innovations of this transmission is its **integrated torque vectoring capability**, which, when paired with Audi s **quattro all-wheel-drive system**, enhances cornering stability and traction by dynamically distributing power between the front and rear axles. The transmission s **electronic differential lock (EDL)** further refines this effect, ensuring that power is directed to the wheels with the most grip, even under extreme conditions. Additionally, the 0CJ-300-042-001 incorporates **Audi s Shift-by-Wire technology**, eliminating traditional mechanical linkages in favor of fully electronic actuation, which not only reduces wear and tear but also allows for more precise and consistent shifting performance over the transmission s lifespan. Built to withstand the demands of high-performance driving, this transmission is rated for **temperatures up to 150 C (302 F)** and is designed to handle torque outputs exceeding **600 Nm (443 lb-ft)**, making it a perfect match for Audi s powerful V6 and V8 engines, including the **3.0L TFSI V6** and **4.0L V8** units found in the S6 and RS6 models.

For maintenance and longevity, the 0CJ-300-042-001 is engineered with **Audi s Multi Clutch Transmission (MCT) fluid**, a high-performance synthetic oil that resists thermal breakdown and provides superior lubrication under extreme conditions. The transmission s **self-diagnostic capabilities** are seamlessly integrated into the vehicle s **Audi MMI system**, alerting drivers to any potential issues via the instrument cluster or infotainment screen, while the **Audi Service Manual (ASM) recommendations** ensure that routine inspections and fluid changes are performed at optimal intervals to prevent premature wear. Whether installed in a **high-revving S5 with a 3.0L V6** or a **torque-monster RS6 with a 4.0L V8**, the 0CJ-300-042-001 delivers a harmonious blend of **sporting agility, luxury refinement, and engineering excellence**, embodying Audi s commitment to pushing the boundaries of automotive innovation.

### Pros and Cons of buying a Audi 0CJ-300-042-001 Transmission

#### **Overview**

The Audi 0CJ-300-042-001 is a **Tiptronic S (0CJ) 6-speed automatic transmission**, commonly found in Audi models such as the A4, A6, and S4 (C5/C6 platforms) from the late 1990s to early 2000s. This transmission is known for its performance-oriented nature but also has several quirks that buyers should consider.

---

### **Pros**

1. **Performance-Oriented Design**

The 0CJ transmission is built for high-performance applications, offering quick shifts and strong torque handling. It is capable of handling the power outputs of naturally aspirated and turbocharged engines in Audi s lineup, making it a solid choice for enthusiasts.

2. **Durability with Proper Maintenance**

When maintained correctly with regular fluid changes, valve body servicing, and clutch inspections the 0CJ can last **150,000 to 250,000 miles** or more. Many examples with proper care exceed 200,000 miles.

3. **Aftermarket Support**

The 0CJ is a well-documented transmission with a strong aftermarket presence. Parts like solenoids, seals, and clutches are widely available, and tuners (such as **AEM, Haltech, or custom ECU flashes**) can optimize its performance.

4. **Compatibility with Modifications**

The transmission pairs well with **turbocharged engines** (e.g., 3.0L V6, 4.2L V8) and can handle **forced induction builds** when properly supported by an ECU tune. Many high-performance Audi projects rely on this transmission.

5. **Repairable and Upgradable**

Unlike some modern transmissions that are sealed units, the 0CJ can be **rebuilt or upgraded** with performance parts (e.g., **ZF 6HP26A upgrades, custom valve bodies, or stronger clutches**). This makes it a cost-effective option for long-term use.

6. **Common in Classic Audi Projects**

Since it was used in **A4/A6/S4 (C5/C6) models**, it is a popular choice for **restomod builds**, where owners often pair it with modern engines while keeping the classic drivetrain aesthetic.

---

### **Cons**

1. **Complexity and Maintenance Requirements**

- **Regular fluid changes** (every 30,000 60,000 miles, using **ZF Lifeguard or Mobil 1 ATF**).

- **Valve body servicing** (every 60,000 100,000 miles to prevent sticking).

- **Clutch inspections** (especially the **6th gear clutch**, which can wear out prematurely).

- **Seal replacements** (input/output shafts, torque converter seals).

Ignoring maintenance leads to **sticky shifts, delayed engagement, or complete failure**.

2. **Common Failure Points**

- **6th Gear Clutch (Reverse Clutch):** Often fails first due to high stress, leading to **no reverse or delayed engagement**.

- **Valve Body:** Can stick or wear out, causing **rough shifts or no upshifts**.

- **Torque Converter:** Some models have **leaking seals or slipping**, especially if fluid is neglected.

- **Solenoids:** Can fail over time, requiring replacement (common in high-mileage examples).

3. **Difficulty in Diagnosis**

Unlike modern transmissions with **OBD-II codes**, the 0CJ often requires **manual shift pattern testing** or **valve body disassembly** to diagnose issues. This makes troubleshooting **time-consuming and costly** if done professionally.

4. **Limited Modern Compatibility**

While it works well with **Audi s older engines**, pairing it with **modern turbocharged units (e.g., 3.0L TFSI, 4.0L FSI)** requires **ECU tuning** to prevent **overheating or clutch failure**. Some builds may need **custom gearing** for optimal performance.

5. **Rebuild Costs Can Be High**

A **full rebuild** (including valve body, clutches, seals, and solenoids) can cost **$1,500 $3,000 **, depending on parts and labor. DIY rebuilds are possible but **require specialized tools and knowledge**.

6. **Shift Quality Degrades Over Time**

Even with maintenance, the 0CJ s shift quality **deteriorates** as it ages. Many owners report **sticky shifts, delayed engagement, or harsh upshifts** in high-mileage examples.

---

### **Ending Conclusion**

The **Audi 0CJ-300-042-001 transmission** is a **capable and durable** choice for **performance-oriented Audi builds**, particularly for those working with **turbocharged engines or classic restomods**. Its **aftermarket support, repairability, and compatibility with high-power setups** make it a favorite among enthusiasts. However, its **complexity, high maintenance demands, and common failure points** mean it is **not ideal for casual drivers or those unwilling to invest time in upkeep**.

If you are **building a high-performance Audi, restoring a classic, or willing to commit to regular maintenance**, the 0CJ is a **solid investment**. If you prefer **low-maintenance, modern transmissions** or are not mechanically inclined, alternatives like the **ZF 6HP26 (09G) or 09J** (found in newer Audis) may be more practical.

---

### **Recommendation**

- You are **building a performance Audi** (e.g., turbocharged A4/A6/S4).

- You are **willing to perform regular maintenance** (fluid changes, valve body service).

- You have **access to aftermarket parts and tuning support**.

- You prefer a **classic drivetrain aesthetic** in a restomod project.

- You want a **plug-and-play, low-maintenance transmission**.

- You are not comfortable with **mechanical repairs or diagnostics**.

- You plan to use it in a **daily driver** without performance modifications.

- You cannot afford **potential rebuild costs** if issues arise.

For **modern, high-mileage examples**, **inspect the transmission thoroughly** (check for leaks, test shifts, verify fluid condition) before purchasing. If buying used, **prioritize examples with documented maintenance records**. If rebuilding, consider **upgrading to a ZF 6HP26A** for improved reliability, though this requires a full transmission swap.

Details:

Parts must be resalable and in the original packaging. Electrical parts are not returnable. Product Genuine Audi Transmission 0CJ-300-042-001. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.

Genuine Audi Transmission 0CJ-300-042-001: Parts: Q5. Losses or damages that occur after final delivery confirmation are not covered. Special Order Items are not returnable under any circumstance.

part #: 0cj300042001 prices

• $424.26-$11811.39

specifications autotransmissionsgo:

• for makes: Audi
• mpn: 0cj-300-042-001
• part type: Transmission
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included
• replaces part number: 0cj-300-041-p-004

seller autotransmissionsgo:

• rating: 99.4%
• # reviews: 6137
• city: Henderson, Nevada

shipping autotransmissionsgo:

• type: Fixed
• service: Flat Rate Freight
• class: Freight
• cost: $232.00

offer autotransmissionsgo:

• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: March 9, 2026

general autotransmissionsgo:

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

payments autotransmissionsgo:

• other
• wallet: Paypal
• credit card: Visa

returns autotransmissionsgo:

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

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