What transmission does a 5.7 Hemi have?
The 5.7 Hemi engine, a popular choice for performance and reliability, is commonly found in Dodge, Chrysler, and Jeep vehicles. Known for its power and efficiency, this engine is paired with specific transmissions designed to handle its capabilities. In this article, we’ll explore the types of transmissions typically paired with the 5.7 Hemi and what makes them suitable for this engine.
Common Transmissions Paired with the 5.7 Hemi
The 5.7 Hemi engine is versatile and used in a variety of vehicles, from trucks to muscle cars. Depending on the vehicle model and year, it is paired with one of the following transmissions:
- 8-Speed Automatic Transmission (TorqueFlite 8HP70): This is the most common transmission paired with the 5.7 Hemi in modern vehicles. It is known for its smooth shifting, fuel efficiency, and ability to handle the engine's torque output.
- 6-Speed Automatic Transmission (66RFE): Found in older models, particularly in trucks like the Ram 1500, this transmission is robust and reliable for heavy-duty applications.
- 5-Speed Automatic Transmission (NAG1 or W5A580): Used in earlier models of vehicles equipped with the 5.7 Hemi, this transmission offers decent performance but has been largely replaced by more advanced options.
Each of these transmissions is designed to complement the 5.7 Hemi’s performance characteristics, ensuring a balance of power, efficiency, and durability.
Why These Transmissions Are Ideal for the 5.7 Hemi
The transmissions paired with the 5.7 Hemi are chosen for their ability to handle the engine's high torque output and provide a smooth driving experience. Here are some reasons why these transmissions are ideal:
- Durability: The 8HP70 and 66RFE are built to withstand the demands of towing and high-performance driving.
- Fuel Efficiency: The 8-speed TorqueFlite transmission improves fuel economy by optimizing gear ratios.
- Performance: These transmissions ensure quick and seamless gear changes, enhancing the driving experience.
By pairing the 5.7 Hemi with these transmissions, manufacturers ensure that drivers get the most out of their vehicles, whether they’re hauling heavy loads or enjoying spirited drives.
Conclusion
The 5.7 Hemi engine is a powerhouse that requires equally capable transmissions to deliver its full potential. Whether it’s the modern 8-speed TorqueFlite or the reliable 6-speed 66RFE, these transmissions are engineered to complement the engine’s performance. If you own a vehicle with a 5.7 Hemi and are experiencing transmission issues, it’s essential to consult a trusted auto repair shop like Kevin’s Autos to ensure your vehicle continues to perform at its best.
Frequently Asked Questions
How can you tell the difference between a 45RFE and an 545RFE?
45RFE and 545RFE
In the 45RFE applications four gears are utilized. In the 545RFE four gears are used on the upshift and a new "gear", 2nd Prime, was used with a different (1.50:1 rather than 1.67:1) ratio to increase versatility when downshifting.
Can my VIN number tell me what transmission I have?
Yes, the Vehicle identification number reveals information about the transmission of the vehicle. But not always. VIN decoding can sometimes be inaccurate because different car manufacturers sometimes code their cars differently.
What is the difference between 65RFE and 545RFE?
The key difference in the 65RFE is the ability to use all six forward gears in sequence when using Electronic Range Select mode. In normal drive mode, however, the 65RFE uses the shift pattern of the 545RFE; thus never using 2nd and 3rd gears in succession.
What transmission is in the 5.7 Hemi?
TorqueFlite® 8 Eight-Speed Automatic Transmission
With the TorqueFlite® 8 Eight-Speed Automatic Transmission. The Class-Exclusive available 5.7L HEMI® V8 engine with the eTorque 1 Mild Hybrid Technology System blends performance-enhancing and efficient technologies with the addition of an available extra 130 pound-feet of torque.
What year 5.7 Hemi to avoid?
The worst years
While the 5.7L HEMI is a powerful and reliable motor, it isn't free from bugs. A few model years, in particular, have proven more problematic than others. Model years 2011 and 2012 stand out when it comes to bad years for the 5.7L HEMI, with 2012 being an especially lousy period for Ram pickups.
What years did Dodge use the 545RFE transmission?
The 545RFE transmission found its way to several SUV and truck applications from 2001 to 2012 with Jeep Commander and Jeep Grand Cherokee models that sport higher output Hemi engines. It could also be found in several Dodge Durango models within this period.
Is the 65RFE transmission reliable?
A: Known as one of the most unreliable transmissions of all time, the Chrysler 65RFE is a fertile breeding ground for a variety of problems. This includes but is not limited to: Valve body crossleakage, burnt overdrive clutches, runaway torque converters, broken sprag assemblies and much more.
How do I know which transmission my Ram 1500 has?
Placard on the driver's side door
Open the driver's side door and look for a white placard with small black lettering. This card contains specific details about the year the car was made, its transmission, engine specifications and other details.
What is the life expectancy of a 5.7 Hemi engine?
Hemis are awesome engines... You could easily have another 150k miles if it was well maintained. Even after that a rebuild will not be too costly and you good for another possible decade+ of usage.
Which Ram trucks have transmission problems?
Significant transmission failure reports have been noted in the 2012, 2013, and 2015 Ram 1500 models, indicating critical reliability problems. Complete transmission failure can leave the vehicle undrivable and necessitate expensive repairs or replacements.
