MOPAR R8000840AF Automatic Transmission

( Manufacturer Part Number: R8000840AF ), ( Manufacturer Warranty: 1 Year ), ( Type: Automatic Transmission Assembly )

Review MOPAR Automatic Transmission Assembly Reman

The **Mopar R8000840AF Automatic Transmission** is a high-performance, factory-direct replacement transmission designed exclusively for Chrysler, Dodge, and Jeep vehicles equipped with the legendary **TorqueFlite 4000 series**, specifically tailored for the **318, 360, and 5.2L V8 engines** found in models like the **Dodge Charger, Chrysler 300, Jeep Grand Cherokee, and Chrysler 300C**. Built to exacting Mopar standards, this transmission delivers seamless shifting, superior durability, and the same legendary reliability that has made Mopar components a trusted choice among performance enthusiasts and restoration specialists alike. Engineered with a **6-speed automatic gearset**, the R8000840AF incorporates a **torque converter with a 3.54 lockup ratio**, ensuring optimal power transfer while maintaining smooth acceleration and efficient fuel economy. Its **heavy-duty planetary gearset** and **precision-machined shafts** are designed to withstand the demands of high-torque applications, making it an ideal match for both stock and modified engines. The transmission features a **robust valve body** with integrated **shift solenoids**, allowing for precise hydraulic control and responsive shifting, whether in standard or performance mode. Constructed from **high-grade cast iron and steel**, the housing is reinforced for durability, while the **sealed internal components** protect against leaks and contamination, ensuring longevity even under extreme conditions. Whether installed in a classic muscle car, a modern muscle machine, or a rugged off-road vehicle, the R8000840AF delivers the same dependable performance that has made Mopar transmissions a benchmark in the aftermarket. With its **direct-fit compatibility** and **OEM-level quality**, this transmission is not just a replacement it s a performance upgrade that restores factory precision and power delivery with every shift.

**Pros and Cons of buying a Mopar R8000840AF Automatic Transmission**

The Mopar R8000840AF is a 4-speed automatic transmission designed for Chrysler vehicles, particularly those from the late 1990s and early 2000s (e.g., Dodge Intrepid, Chrysler Concorde, or 300M). Below is a detailed breakdown of its advantages and disadvantages.

---

### **Pros**

1. **Compatibility and Reliability for Classic Chrysler Vehicles**

The R8000840AF is a well-documented transmission for its era, meaning it is widely available and supported by aftermarket parts and mechanics familiar with Chrysler applications. Many owners of these vehicles rely on this transmission for its proven performance in high-mileage models.

2. **Proven Durability in Heavy-Duty Applications**

This transmission was used in performance-oriented Chrysler vehicles, including those with V8 engines. It is built to handle higher torque loads compared to some lighter automatic transmissions, making it suitable for modified or high-performance setups if properly maintained.

3. **Availability of Parts and Tuning Support**

Due to its popularity in classic Chrysler cars, aftermarket manufacturers produce gaskets, seals, solenoids, and other components. Additionally, tuners and performance shops often support this transmission with software adjustments or upgrades (e.g., torque converter upgrades, valve body modifications).

4. **Lower Cost Compared to New Transmissions**

Purchasing a used or rebuilt R8000840AF is significantly cheaper than buying a new transmission, especially for older vehicles. Rebuilt units from reputable shops can offer a cost-effective solution with extended warranties.

5. **Modularity and Upgrade Potential**

The transmission can be upgraded with performance parts such as a heavier-duty torque converter, upgraded solenoids, or a performance valve body. Some owners also opt for clutch kits or internal upgrades to improve shifting and durability.

6. **Good for High-Mileage Applications**

With proper maintenance (fluid changes, filter replacements, and inspections), this transmission can last well beyond 150,000 miles in suitable applications. Many examples exceed 200,000 miles with regular care.

7. **Easy to Find Mechanics with Experience**

Since Chrysler vehicles from this era are still driven by enthusiasts, mechanics specializing in these transmissions are more common than for rarer or newer models. This makes repairs and diagnostics more accessible.

---

### **Cons**

1. **Aging Design with Potential Weaknesses**

- **Internal wear**: Bearings, bushings, and synchronizers can wear out over time, leading to rough shifting or failure.

- **Solenoid failures**: The electronic solenoids can degrade, causing erratic shifting or failure to engage gears properly.

- **Torque converter issues**: Slippage or failure of the torque converter is common in high-mileage examples, especially if fluid has not been changed regularly.

2. **Electronic Complexity**

This transmission relies on electronic controls for shifting, which can be finicky. Issues with the transmission control module (TCM), wiring, or sensors (e.g., speed sensors, throttle position sensor) can cause shifting problems that are harder to diagnose than mechanical failures.

3. **Fluid and Filter Maintenance Requirements**

The transmission fluid must be changed regularly (every 30,000 60,000 miles) to prevent sludge buildup and internal damage. Many owners neglect this, leading to premature failure. Additionally, the filter (if applicable) should be replaced during fluid changes.

4. **Limited Modern Support**

While parts are available, some components (e.g., specific seals or gaskets) may require sourcing from specialty suppliers. Newer Chrysler vehicles use different transmissions, so mechanics may not be as familiar with this older model.

5. **Potential for Rough Shifting or Hesitation**

Even with proper maintenance, the R8000840AF can develop shifting issues over time. Some owners report hesitation during acceleration or delayed engagement, which may require valve body cleaning or solenoid replacement.

6. **Torque Limitations**

While it handles V8 engines well, it may struggle with extreme torque modifications (e.g., big-block engines or heavy-duty builds) without internal upgrades or a stronger transmission (e.g., a 6040 or 61TE).

7. **Rebuilt Quality Varies**

Not all rebuilt transmissions are equal. Some shops cut corners on quality control, leading to premature failures. It s crucial to purchase from a reputable shop with a warranty and good reviews.

---

### **Conclusion**

The Mopar R8000840AF automatic transmission is a solid choice for Chrysler vehicles from the late '90s and early 2000s, particularly for owners who prioritize reliability, availability of parts, and cost-effectiveness. It excels in classic applications where maintenance is consistent and can handle moderate to high torque loads with proper care. However, its aging design and electronic complexity mean it requires vigilant upkeep to avoid common issues like solenoid failures, fluid-related problems, or internal wear.

For enthusiasts who enjoy working on their vehicles or have access to experienced mechanics, this transmission offers a balance of performance and affordability. Those who prefer plug-and-play solutions or plan to drive their vehicles aggressively may need to invest in upgrades or consider a more modern transmission.

---

### **Recommendation**

- You own a compatible Chrysler vehicle (e.g., Intrepid, Concorde, 300M) and need a reliable, cost-effective transmission.

- You are prepared to maintain it properly (regular fluid changes, inspections, and addressing minor issues promptly).

- You have access to mechanics familiar with this transmission or are willing to learn about its maintenance.

- You plan to use it in a moderate-performance application or a classic car setting where longevity is prioritized over extreme power.

- You expect to drive the vehicle aggressively with high torque (e.g., big-block engines) without internal upgrades.

- You cannot commit to regular maintenance (fluid changes, filter replacements, and inspections).

- You prefer a transmission with fewer electronic issues or one that is more widely supported in modern applications.

- You are on a tight budget and cannot afford potential repair costs if the transmission fails prematurely.

If purchasing used or rebuilt, buy from a reputable shop with a warranty and thoroughly inspect the transmission for leaks, smooth shifting, and no warning signs of internal wear. Consider upgrading the torque converter and solenoids if the vehicle will see heavy use. For extreme power applications, pair it with a stronger transmission or internal modifications. Otherwise, the R8000840AF remains a practical and capable choice for its intended applications.

Details:

If you do, our experts will hand-verify compatibility before shipping. See below for instructions. Add details like Tried to install this part, and it didn't fit. Request a Return. High-value items are usually sent with signature-delivery requirements.

Changed My Mind. Just Didn't Like it. Found a Better Price. This part fits vehicles made in the following years 2007 ,2008,2009.

R8000840AF: Mopar: Automatic Transmission Assembly Mopar R8000840AF Reman.

part #: r8000840af prices

• $861.00-$7326.80

specifications autotransmissionsgo:

• for makes: Mopar
• mpn: R8000840af
• manufacturer warranty: 1 Year
• type: Automatic Transmission Assembly

seller autotransmissionsgo:

• city: Garland, Texas
• rating: 99.2%
• # reviews: 19119

general autotransmissionsgo:

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

shipping autotransmissionsgo:

• type: Fixed
• cost: $0.00
• service: Standard
• transit: 19-29 Days
• class: Standard

offer autotransmissionsgo:

• started: May 15, 2026
• sold: 0
• quantity: 2
• options: Ship-to-home
• availability: In Stock

returns autotransmissionsgo:

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

payments autotransmissionsgo:

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

Mopar R8000840AF Is Similar To:

• 04659559ac Mopar Transmission Range Sensor (45.8% similar) We dedicate ourselves to giving you the service and care that expect reminds come see us again. It is this experience and vendor relationships that brings to you...(June 14th, 2018)
• 04659676ac Mopar Transmission Range Sensor (45.8% similar) 0, town country, voyager with the trims of anniversary edition mini passenger van 4-DOOR, base convertible 2-DOOR, coupe cargo 3-DOOR, sedan sport utility wagon c v classic crossroad dream Eli equipped es ex express express FTC JX JX Le limited LX lxi r se plus street cruiser route 66 SC STX touring...(April 1st, 2018)
• 1-04798152ad Mopar Transmission Rebuild Kit Jeep Wrangler Yj (40.4% similar) Gasket, filter and seal package. Brand new old stock automatic transmission rebuild kit for wrangler J...(December 16th, 2018)
• MOPAR 4659559AC Transmission Range Sensor (40% similar) Many new, original equipment parts are automatically included in the re manufacturing process. About the brand the mopar re manufacturing process begins with a complete disassembly, cleaning and inspection of the used part or core. Mopar's comprehensive remanufactured...(March 14th, 2014)
• 4659676ac Mopar Transmission Range Sensor (46.3% similar) 0, town country, voyager with the trims of anniversary edition mini passenger van 4-DOOR, base convertible 2-DOOR, coupe cargo 3-DOOR, sedan sport utility wagon c v classic crossroad dream Eli equipped es ex express express FTC JX JX Le limited LX lxi r se plus street cruiser route 66 SC STX touring...(January 17th, 2018)
• 5003190aa Mopar Jeep Grand Cherokee Auto Transmission Tested (49.1% similar) Otherwise for estimate. Please message me thru before order is placed to get shipping charges. 2L, 4X4 please look at the compatibility list and read notes to make sure this will fit your application. Only applies to residential commercial is free shipping included. Transfer cases will not be ...(July 16th, 2018)
• 5078556aa Mopar Transmission Oil Pan Grand Caravan (44.2% similar) Came off a 2015 grand caravan with 6 speed automatic transmission...(June 3rd, 2018)
• 52120027ad Mopar Dodge Charger Automatic Transmission Oem (59.5% similar) Buyer pays return shipping. Over 2 acres of Chrysler jeep parts...(March 8th, 2018)
• 5285069aa Mopar Transmission For Various Dodge Jeep Vehicles (36.8% similar) Feel free to with any questions about part compatibility. Please match part numbers before deciding to purchase. Free flat rate shipping if offered is for the lower 48 us. This does not mean it is ready to be installed on your vehicle. Items are all cores and will most likely need to be refinished. ...(August 10th, 2018)
• 68003115ad Mopar Chrylser Hemi Oem Automatic Transmission Converter (51.2% similar) Here for more SRT-8 parts questions. What you see in the photos is will receive. Please review all photos for further details...(July 10th, 2018)
• 68020005aa Mopar Transmission Range Sensor (45.8% similar) Information like which side a part fits left or right and specific vehicle attributes transmission, AWD RWD, other exclusions are included for your in this column. The image usually shows all pieces and qty included with part. With the exception of this paragraph, all product specifics, images and ...(May 13th, 2018)