PORSCHE 9629.P928 Automatic Transmission Torque Converter LM03

( Manufacturer Part Number: 9629.P928 ), ( Type: Torque Converter )

Review PORSCHE Automatic Transmission Torque Converter Oem fits 928 1983

The **Porsche 928 S2 (Chassis 9629.P928) from 1983** is a rare and highly sought-after masterpiece of Porsche engineering, embodying the pinnacle of luxury, performance, and German craftsmanship from the golden era of grand touring automobiles. This particular example, equipped with the legendary **928S2 5.0-liter air-cooled V8 engine** paired with the exclusive **automatic transmission featuring a torque converter (LM03)**, represents one of the most exclusive configurations of the 928 lineup. The 5.0-liter engine, producing a robust **300 horsepower** (later models would increase this to 320), is a refined evolution of the original 928 s 4.5-liter powerplant, delivering a smooth yet exhilarating blend of torque and high-revving enthusiasm. The air-cooled V8, with its iconic dual overhead camshafts and four valves per cylinder, not only provides a deep, resonant exhaust note but also ensures a level of reliability and durability that has made Porsche s air-cooled engines legendary. The **LM03 automatic transmission**, a collaboration with ZF, was a groundbreaking feature in 1983, offering a seamless driving experience without sacrificing the 928 s inherent character. While automatics were not the primary focus of Porsche s identity, the inclusion of this system in the 928S2 especially in a model like this makes it a fascinating hybrid of luxury and technology, catering to those who desired the comfort of an automatic while still appreciating the underpinnings of a high-performance grand tourer.

Visually, the 1983 928S2 exudes timeless elegance with its **sharp, angular bodywork**, defined by sleek lines, a distinctive front grille with its signature "Porsche" logo, and the iconic **quad headlights** that give it a commanding presence on the road. The **Karmann-Ghia-inspired roofline**, with its smooth, flowing curves, complements the car s aerodynamic efficiency, while the **chrome accents** and **wood or leather interior options** (depending on the trim) add a touch of opulence. The **wide, low stance** of the 928, supported by its independent suspension system with coil springs and anti-roll bars, not only enhances its sporty handling but also contributes to its luxurious ride quality. The **all-wheel-drive system**, standard on all 928 models, ensures exceptional traction and stability, making it a versatile machine for both the track and the open road.

Under the hood, the 928S2 s **5.0-liter V8** is a marvel of engineering, featuring **four valves per cylinder** and **dry-sump lubrication**, which not only improves performance but also extends the engine s lifespan. The **electronic fuel injection (Bosch L-Jetronic)** system ensures precise fuel delivery, while the **dual exhaust system** produces a deep, growling exhaust note that is as satisfying as it is iconic. The **automatic transmission**, though less common in Porsche s lineup, was a sophisticated addition in 1983, featuring a **torque converter** that smoothly transfers power from the engine to the wheels, eliminating the need for a traditional clutch. This system, while not as engaging to drive as a manual, offers a level of convenience that was revolutionary at the time, particularly for those who valued comfort without compromising on performance. The **ZF-sourced automatic** was also known for its durability, making this 928S2 a practical yet luxurious choice for enthusiasts who wanted the best of both worlds.

The interior of the 1983 928S2 is a testament to Porsche s commitment to both performance and refinement. The **driver-focused cockpit** features a **center-mounted shifter** (in the case of the automatic model), surrounded by high-quality materials such as **leather upholstery, wood trim, and chrome accents**. The **recaro seats**, available in various configurations, provide excellent support and comfort, whether for long-distance cruising or spirited driving. The **instrument cluster**, with its analog dials and clear, legible readouts, offers all the necessary information at a glance, while the **climate control system** ensures a comfortable environment year-round. The **sound insulation** is exceptional, reducing road noise and allowing the driver to fully appreciate the engine s symphony. Even in automatic form, the 928S2 retains a sense of driving engagement, with its **all-wheel-drive system** and **precise steering** ensuring that the car remains connected to the road.

One of the most compelling aspects of this 1983 Porsche 928S2 (Chassis 9629.P928) is its **historical significance**. Produced during a transitional period in Porsche s history, the 928 was the brand s first **all-new model** since the 911, and it represented a bold departure from the traditional rear-engine layout. The 928 was designed to be a **luxury grand tourer**, blending Porsche s racing heritage with the comfort and sophistication of a high-end sports sedan. The **5.0-liter V8** was a departure from the brand s usual air-cooled flat-six engines, making the 928 a unique hybrid in Porsche s lineup. The inclusion of an **automatic transmission** in this model further cements its place as a rare and desirable variant, appealing to collectors who appreciate both the car s performance and its exclusivity. With only a limited number of 928S2 models produced, particularly those with the automatic option, this chassis represents a true piece of automotive history one that combines rarity, innovation, and timeless design.

For the discerning enthusiast, this 1983 Porsche 928S2 (Chassis 9629.P928) with its **5.0-liter V8 and automatic transmission** is more than just a car; it is a **rolling museum piece**, a blend of Porsche s racing pedigree and its commitment to luxury. Whether cruising along a scenic coastal highway or navigating a twisty mountain road, this 928 delivers a **perfect balance of power, comfort, and character**. The **torque converter automatic** ensures a smooth and effortless driving experience, while the **air-cooled V8** provides a soundtrack that is as thrilling as it is nostalgic. With its **all-wheel-drive system**, **independent suspension**, and **refined interior**, this 928S2 is a testament to Porsche s ability to create a car that is as enjoyable to live with as it is to drive. For those who seek a rare, high-performance grand tourer with a touch of exclusivity, the 1983 Porsche 928S2 (Chassis 9629.P928) stands as a masterpiece of automotive engineering a car that transcends its era and continues to captivate generations of enthusiasts.

### **Pros and Cons of Buying a 1983 Porsche 928 (LM03, 9629.p928, Automatic Transmission with Torque Converter)**

#### **Pros**

**1. Classic Porsche Engineering and Prestige**

The 1983 Porsche 928 is a rare and highly sought-after model, representing the pinnacle of Porsche s engineering in the early 1980s. It was one of the first front-engine, rear-wheel-drive luxury grand tourers from Porsche, blending performance with comfort. Its V8 engine (initially the 4.5L Type 928/01, later upgraded to the 5.0L in 1984) was a refined powerplant for its time, offering smooth acceleration and a luxurious driving experience. Owning one carries significant prestige, especially among Porsche enthusiasts and collectors.

**2. Strong and Reliable Engine (When Well-Maintained)**

The 928 s air-cooled V8 was a robust unit when properly maintained. The LM03 chassis (introduced in 1980) featured a more refined suspension, improved handling, and better road manners than earlier models. The 5.0L engine (available in the 1983 model) produced **280 hp (SAE gross)**, which, while not as powerful by modern standards, was impressive for its era and delivered a smooth, torquey driving experience. Many early 928s with low mileage retain their original engines, which can be a major selling point if the car has been well-cared-for.

**3. Automatic Transmission Option (Torque Converter)**

The availability of an automatic transmission (ZF 5-speed with torque converter) makes the 928 more accessible to buyers who prefer a smoother, more relaxed driving experience. Automatic transmissions in classic Porsches are rare, and the 928 s version, while not as refined as modern automatics, is functional and can be a nice feature for those who dislike manual transmissions. However, torque converters in older cars can be less efficient than modern CVTs or dual-clutch automatics, so fuel economy will not be great.

**4. Luxury and Comfort**

The 928 was designed as a grand tourer, offering a spacious, well-appointed interior with high-quality materials (for its time). The seating is comfortable for long drives, and the car s weight (around **3,600 3,800 lbs**) contributes to a smooth ride, though it is not as nimble as a 911. The interior includes features like power windows, air conditioning (in later models), and a refined dashboard layout, making it a comfortable daily driver for those who appreciate classic luxury.

**5. Collectibility and Investment Potential**

The 1983 928 (especially in low-mileage condition) is a desirable collector s item. As one of the rarest early 928s, it holds value well, particularly if it is a well-documented, original-spec example. The market for classic Porsches has seen steady appreciation, and a properly restored 928 could be a sound investment for enthusiasts. The LM03 chassis is particularly sought after due to its improvements over the earlier 928/01.

**6. Customization and Modification Potential**

While not as mod-friendly as a 911, the 928 offers opportunities for tuning and restoration. Engine upgrades (such as forced induction or cylinder head work) can significantly improve performance, though air-cooled V8s are not as easily modified as modern turbocharged engines. Cosmetic restorations (bodywork, interior updates) can enhance its appeal without drastically altering its character.

**7. Unique Driving Experience**

For those who appreciate the feel of a heavy, powerful grand tourer, the 928 offers a distinct driving experience. The torquey V8 provides a satisfying rumble, and the car s weight gives it a planted, stable feel on the road. While not as sharp as a 911, it excels in straight-line speed and cruising comfort, making it a fun yet civilized car to drive.

---

#### **Cons**

**1. High Maintenance and Repair Costs**

The 928 is not a low-maintenance vehicle. As an air-cooled Porsche, it requires regular attention to cooling systems, suspension components, and electrical systems. The automatic transmission (ZF 5-speed) is less common than manual transmissions, which can make repairs more expensive. Common issues include:

- **Cooling system failures** (water pump, thermostat, hoses) due to the air-cooled engine s susceptibility to overheating.

- **Suspension wear** (shock absorbers, bushings, ball joints) over time, requiring frequent replacements.

- **Electrical gremlins** (common in older Porsches), such as faulty sensors, wiring issues, or failing gauges.

- **Transmission maintenance** (automatics require regular fluid changes and potential rebuilds).

- **Rust** (especially in the wheel wells, sills, and undercarriage), which can be a major issue if not addressed early.

**2. Poor Fuel Economy**

The 928 is a thirsty car by modern standards. The 5.0L V8 in automatic mode will average **around 12 15 MPG (city/highway)**, depending on driving conditions. This makes it impractical for daily use in urban settings where fuel costs are high. Even with a manual transmission, fuel economy is not great (around **15 18 MPG**).

**3. Weight and Handling Limitations**

At over **3,600 lbs**, the 928 is a heavy car, which affects acceleration, braking, and maneuverability. While it handles well for its size, it is not as nimble as a 911 or even a modern luxury grand tourer. Cornering is adequate but not sharp, and the car s weight makes it less responsive to quick inputs. This can be a drawback for drivers who prefer a more agile vehicle.

**4. Automatic Transmission Drawbacks**

- **Slower acceleration** compared to a manual transmission, as torque converters are less efficient than clutches.

- **Higher maintenance costs** due to the complexity of the ZF transmission and torque converter.

- **Less engaging driving experience** for enthusiasts who enjoy manual shifting.

- **Potential for rough shifts** if the transmission is not well-maintained.

**5. Parts Availability and Cost**

Finding original or high-quality aftermarket parts for a 928 can be challenging and expensive. While Porsche still supports older models, some components (such as suspension parts, cooling system items, or interior upholstery) may require special ordering or restoration. This can add to the overall cost of ownership, especially if the car is not in pristine condition.

**6. Depreciation and Market Volatility**

While the 928 holds value well, it is not as appreciating as some other classic Porsches (e.g., 911s, 356s, or 550 Spyder). The market for grand tourers can be less stable than for performance-focused models. Additionally, the car s size and weight make it less desirable for some buyers, which could limit resale value compared to smaller, more agile Porsches.

**7. Potential for Hidden Issues**

- **Engine wear** (valvetrain, pistons, or cylinder head leaks).

- **Transmission wear** (automatics can develop slipping or rough shifting).

- **Suspension and steering components** (worn bushings, ball joints, or tie rods).

- **Electrical system failures** (faulty sensors, wiring, or gauges).

- **Rust and structural damage** (especially in older examples).

A thorough pre-purchase inspection by a Porsche specialist is **essential** to avoid costly surprises.

**8. Limited Practicality for Daily Use**

The 928 is not ideal for daily driving in most modern contexts. Its size makes parking and maneuvering difficult in urban areas, and its fuel efficiency is poor. While it can be a fun weekend or vacation car, it is not practical for commuting or frequent use in cities.

---

### **Ending Conclusion**

The **1983 Porsche 928 (LM03, 9629.p928, automatic transmission)** is a **highly desirable but expensive-to-own classic grand tourer**. It offers a unique blend of luxury, power, and Porsche heritage, making it a fantastic investment for collectors and enthusiasts who appreciate its rarity and character. However, it comes with **significant drawbacks**, particularly in terms of maintenance costs, fuel efficiency, and practicality for daily use.

- **Collectors and investors** who see it as a long-term appreciation asset.

- **Enthusiasts who prioritize driving experience and prestige** over practicality.

- **Owners with deep pockets** who are prepared for high maintenance and repair costs.

- **Those who enjoy cruising in comfort** and do not mind a heavy, powerful grand tourer.

- **High ongoing costs** (maintenance, parts, insurance).

- **Poor fuel economy**

Details:

1983 PORSCHE 928, AUTOMATIC TRANSMISSION TORQUE CONVERTER, OEM LM03, This torque converter is in good condition with minor cosmetic flaws. 1983 Porsche 928sVin - WP0JB0924DS860691Mileage 130,073kEngine 4.7L V8 M28/11Transmission Auto Transmission Body Coupe Exterior Color Brown Interior Beige Stock # LM03, Removed From: 928S with 126,245 miles, Please review all pictures to assess the condition of item. Works as should. Larsen Motors.

part #: 9629p928 prices

• $161.99-$199.00

specifications torquconv:

• for makes: Porsche
• for years: 1983
• mpn: 9629.p928
• type: Torque Converter

payments torquconv:

• other
• credit card: Diners-club
• wallet: Paypal

seller torquconv:

• # reviews: 8135
• rating: 98.4%
• city: Pomeroy, Pennsylvania

offer torquconv:

• started: March 10, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1
• best offers: True

shipping torquconv:

• type: Calculated
• carrier: UPS, FedEx
• class: Economy
• cost: $82.78
• service: UPS Ground Saver, FedEx Ground Economy
• transit: 6-10 Days

returns torquconv:

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

general torquconv:

• Car Truck Parts Accessories > Transmission Drivetrain > Torque Converters
• condition: Used

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