PONTIAC 89059899 Supercharged Automatic Transmission General 3.8L 4T65-E

( Manufacturer Part Number: 89059899 ), ( Type: Automatic Transmission ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review PONTIAC General Motors 3.8l Supercharged Automatic Transmission fits PRIX GRAND 2004

The **2004 Pontiac Prix with a 3.8L Supercharged V6 and 4T65-E Automatic Transmission** (VIN 89059899) represents a refined yet underrated gem from General Motors mid-2000s lineup, blending sporty performance with the comfort and practicality of a full-size luxury sedan. Engineered for those who crave a balance between exhilarating acceleration and effortless highway cruising, this model is powered by a **3.8-liter LS1-based V6** a naturally aspirated yet supercharged variant of GM s legendary small-block architecture, producing a robust **285 horsepower and 280 lb-ft of torque**. The supercharger, a hallmark of the era s performance-oriented Pontiacs, delivers a throaty, growling exhaust note and a noticeable surge of power, making the Prix feel alive at the throttle while maintaining a smooth, linear powerband that rewards both casual drivers and enthusiasts. The **4T65-E automatic transmission**, a robust and reliable four-speed unit with an overdrive ratio, ensures seamless shifts and a quiet, refined ride, though it benefits from occasional maintenance to preserve its longevity especially in high-mileage examples.

Mechanically, this Prix is built on the **GM Epsilon II platform**, shared with the Cadillac XLR and other luxury vehicles, which contributes to its spacious, well-appointed cabin and solid structural integrity. The **3.8L supercharged V6** is paired with a **front-wheel-drive layout** (though some models may include optional traction control and stability features), offering a comfortable ride over varied road conditions while maintaining a sporty demeanor. The engine s supercharger requires regular oil changes with **full synthetic oil** and a **supercharger-specific oil filter** to prevent premature wear, a detail often overlooked but critical for preserving performance. The **4T65-E transmission**, while durable, may exhibit signs of wear in higher-mileage units, such as delayed engagement or occasional hesitation, which can often be addressed with a transmission fluid flush and valve body servicing.

Inside, the Prix exudes a blend of **2000s luxury and Pontiac s signature boldness**, with a **three-spoke sport steering wheel**, **leather-trimmed seats** (often available in premium textures like Alcantara or genuine leather), and a **digital instrument cluster** that provides clear, easy-to-read information. The **climate control system** is both intuitive and powerful, with dual-zone automatic temperature settings and a **heated steering wheel** as an available luxury feature. The **infotainment system** typically includes a **CD/MP3 player with a six-disc in-dash changer** (though some models may feature an optional **Satellite Radio** or **Bluetooth connectivity** in later trim upgrades), complemented by **power-adjustable seats, power mirrors, and a power liftgate** for added convenience. The **interior materials** while not as premium as those in a Cadillac or Lincoln are well-crafted, with a mix of soft-touch plastics, wood or wood-grain trim accents, and chrome detailing that give the cabin a polished, upscale appearance.

For those seeking a **performance-oriented yet practical luxury sedan**, the Prix delivers with its **supercharged V6 s eager response**, making it a standout in its class for its **0-60 mph times in the low 7-second range** (depending on weight and tuning). The **4T65-E transmission** handles the power delivery smoothly, though enthusiasts may appreciate the option to upgrade to a **performance exhaust system** or **tune** to coax out additional horsepower. The **suspension setup** is tuned for a **comfortable yet responsive ride**, with **adjustable shocks** (available in some trims) allowing for a slight firmness adjustment for sportier handling. While not as nimble as a sports car, the Prix offers **adequate cornering stability** and a **neutral steering feel**, making it enjoyable to drive on winding roads.

Under the hood, the **3.8L supercharged V6** is a workhorse, but it demands **proper maintenance** to avoid common issues such as **supercharger belt wear, oil leaks from the valve cover gasket, or transmission fluid degradation**. Regular **coolant flushes** are essential due to the supercharger s heat output, and the **intercooler** should be inspected for clogs or damage, as restricted airflow can reduce performance. The **4T65-E transmission** benefits from **fresh fluid every 60,000 miles** and occasional **valve body cleaning** to prevent rough shifting. With diligent care, this engine and transmission combo can easily exceed **200,000 miles**, making it a **reliable and rewarding** choice for buyers seeking a **luxury sedan with a performance edge**.

Externally, the Prix features a **bold, angular design** characteristic of the early 2000s, with **sharp creases, a prominent grille, and sleek LED or halogen headlights** (depending on the trim). The **aerodynamic bodywork** includes **side skirts, a rear spoiler, and alloy wheels** (often **17-inch or 18-inch wheels** in premium packages), giving it a **sporty yet sophisticated** appearance. The **available **Uconnect infotainment system** (in later models) or **optional navigation** adds modern convenience, though some units may require updates for full functionality. The **rear cargo area** provides **ample space**, with a **fold-down rear seat** and a **usable 14.5 cubic feet of trunk volume**, making it practical for daily driving or weekend getaways.

In summary, the **2004 Pontiac Prix with a 3.8L supercharged V6 and 4T65-E automatic transmission** is a **well-rounded luxury sedan** that combines **thrilling performance with everyday comfort**, all while offering a **distinctive, high-performance driving experience** at a fraction of the cost of its Cadillac or Lincoln counterparts. With **proper maintenance**, this vehicle can be a **durable and enjoyable** addition to any collection, appealing to both **performance enthusiasts** and **luxury seekers** who appreciate a **bold, supercharged powerplant** paired with a **refined, spacious cabin**. Whether cruising down the highway or navigating city streets, this Prix delivers a **unique blend of power, style, and practicality** that sets it apart in its class.

### **Pros and Cons of Buying a 2004 Pontiac G6 3.8L Supercharged (89059899) with 4T65-E Automatic Transmission**

#### **Pros**

1. **Powerful Engine** The 3.8L supercharged V6 produces around **285 300 horsepower**, making it one of the more powerful G6 variants. This provides strong acceleration and towing capability compared to naturally aspirated models.

2. **Supercharger Reliability (If Maintained)** Superchargers can last a long time if properly maintained (regular oil changes, belt tension checks). Some units have been known to hold up well past 150,000 miles if cared for.

3. **Automatic Transmission (4T65-E)** The 4T65-E is a robust, heavy-duty automatic transmission commonly found in full-size trucks and SUVs. It is known for durability and can handle the supercharged engine s power well.

4. **Front-Wheel Drive (FWD) Handling** While not AWD, FWD can be more efficient in snow and ice compared to RWD, and the G6 s handling is generally smooth for a mid-size car.

5. **Potential for Modifications** The supercharged engine has a strong aftermarket presence, allowing for upgrades like intake/exhaust, ECU tuning, or even forced induction upgrades (though supercharger reliability must be considered).

6. **Decent Interior for the Price** Some G6s come with decent upholstery, power features (power windows, locks, seats), and a relatively spacious cabin for the era.

7. **Lower Mileage Options Available** If you find one with **under 100,000 miles**, it could still have significant life left, especially if well-maintained.

8. **Resale Value (If Well-Kept)** While not high, a clean G6 with a supercharged engine may hold value better than a naturally aspirated one due to its performance reputation.

---

#### **Cons**

1. **Supercharger Wear & Tear** Superchargers are **high-maintenance components**. They require **frequent oil changes (every 3,000 5,000 miles)**, proper belt tension, and occasional belt replacements. Neglecting this can lead to **expensive failures** (blown belts, seized pulleys, or even engine damage from oil starvation).

2. **Fuel Economy** The supercharged engine is **not fuel-efficient**. Expect around **14 16 MPG in the city and 20 22 MPG on the highway** worse than a naturally aspirated V6 ( 20 MPG combined).

3. **Transmission Issues (4T65-E)** While durable, the 4T65-E can develop **rough shifting, delayed engagement, or even failure** if fluid isn t changed every **60,000 100,000 miles**. Some owners report **slipping or jerking** if neglected.

4. **Rust Concerns** Pontiacs from this era (especially in snowy or coastal regions) are **prone to rust**, particularly in the wheel wells, rocker panels, and undercarriage. A thorough inspection is **essential**.

5. **Electrical & Reliability Quirks** Many G6s (especially from 2004) suffer from **electrical gremlins** (faulty sensors, wiring issues, or computer glitches). The **PCM (Powertrain Control Module) can fail**, leading to check engine lights and drivability issues.

6. **Suspension & Handling Wear** After **100,000 miles**, the **shocks, struts, and bushings** often wear out, leading to a **rough ride and poor handling**. Replacing these can be costly.

7. **Recall & Safety Issues** The G6 has had **recalls for airbag, seatbelt, and fuel system issues**. Always check **NHTSA s recall database** before purchasing.

8. **Parts & Repair Costs** While not as expensive as some luxury brands, **Pontiac parts can be hard to find**, and labor costs add up. The supercharger alone can cost **$500 $1,500 to repair** if it fails.

9. **Depreciation** The G6 is **not a highly sought-after car**, meaning resale value is **low**. If you plan to keep it long-term, you may not recover much money.

10. **Potential for Hidden Problems** Without a **detailed service history**, you risk buying a car with **ignored maintenance issues** (timing belt, water pump, serpentine belt, etc.). The **timing belt must be replaced every 60,000 100,000 miles** if it breaks, it can **destroy the engine**.

---

### **Conclusion & Recommendation**

#### **Who Should Buy This Car?**

- **Enthusiasts who enjoy modifying and maintaining performance cars** and are willing to invest time/money in upkeep.

- **Budget-conscious buyers who find a well-documented, low-mileage example** (under 100,000 miles) with **full service records**, especially for **oil changes, supercharger maintenance, and transmission fluid**.

- **Those who prioritize power over efficiency** and don t mind **higher running costs**.

- **People who plan to keep it short-term** (2 3 years) and won t mind selling it for parts or a low price.

#### **Who Should Avoid It?**

- **First-time car buyers or those who dislike mechanical work** this car requires **regular maintenance** to avoid costly failures.

- **People who value fuel efficiency** the supercharged engine will **drain your wallet at the pump**.

- **Buyers who want a reliable, low-maintenance daily driver** there are **better-used options** (e.g., Toyota Camry, Honda Accord, or even a well-maintained VW Jetta).

- **Those who can t afford unexpected repairs** supercharger, transmission, and rust issues can **easily exceed $2,000 $5,000** in repairs.

#### **Final Recommendation**

**Full service records** (especially supercharger/oil changes)

**No major rust**

**Smooth transmission shifts**

**No check engine lights or electrical issues**

**Low mileage (under 100,000 miles)**

then it **could be a fun, powerful project car** for someone who enjoys working on engines. However, if you re looking for a **reliable, hassle-free used car**, there are **far better alternatives** in the same price range.

**Best Case:** A **well-maintained, low-mileage G6** with a **supercharger that s been properly serviced** can be a **great project car** for the right buyer.

**Worst Case:** A **neglected G6** with **ignored maintenance** will **cost more in repairs than it s worth** and may not be worth the risk.

**Alternative Suggestion:** If you like the power but want **less hassle**, consider a **used Ford Mustang GT (2005 2011) or a Chevy SS** both have **similar power levels** but with **better reliability records** in some cases. If you prefer **better fuel economy**, a **turbocharged 2.0L EcoBoost Ford Focus or Mazda3** would be a smarter buy.

Details:

Shipping costs are not negotiable, in most cases. Listing titles limit the amount of key words that can be used, so it may listed under another name. Make: Pontiac. Be sure to select an accurate reason when opening a case.

Car drove before removing. Part #: 89059899. Furthermore, there may be cross compatibility from one make to another Nissan and Infiniti, for example. Residential/commercial address, lift gate access, etc.

Keep in, mind there are some fringe years where the item may be compatible with one model but not another RWD vs AWD, for example. Transmission: 4 Speed Automatic, 4T65-E, Heavy Duty.

part #: 89059899 prices

• $90.00-$1999.00

specifications autotransmissionsgo:

• for models: Prix, Grand
• for makes: Pontiac
• for years: 2004
• mpn: 89059899
• type: Automatic Transmission
• universal fitment: No
• country of origin: United States

payments autotransmissionsgo:

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

seller autotransmissionsgo:

• rating: 99.9%
• city: Tucson, Arizona
• # reviews: 3297

shipping autotransmissionsgo:

• service: Flat Rate Freight
• cost: $450.00
• class: Freight
• type: Fixed

general autotransmissionsgo:

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

offer autotransmissionsgo:

• started: June 3, 2026
• sold: 0
• best offers: True
• availability: In Stock
• options: Ship-to-home
• quantity: 1

returns autotransmissionsgo:

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

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