The Dodge Charger, a muscle car icon, boasts an impressive lineup of powerful engines, but the transmission options play a crucial role in its performance. The 8HP90 and 8HP70 automatics are two distinct transmissions used in the 7th-gen Charger, each with its strengths and weaknesses. In this article, we'll delve into the details of these transmissions and explore their capabilities, common issues, and what they mean for Dodge enthusiasts. ### Engine and Transmission Pairings The 7th-gen Dodge Charger is available with a range of powerful HEMI engines, including the supercharged 6.2-liter V8. The 8HP90 automatic transmission is paired with these more powerful engines, such as the SRT Hellcat, and is rated for torque values of up to 1,000 Nm (about 738 pound-feet). This transmission is designed to handle the increased power output of the supercharged HEMI, but it's also susceptible to internal wear from aggressive driving. In contrast, the 8HP70 ...
The Dodge Charger, a muscle car icon, boasts an impressive lineup of powerful engines, but the transmission options play a crucial role in its performance. The 8HP90 and 8HP70 automatics are two distinct transmissions used in the 7th-gen Charger, each with its strengths and weaknesses. In this article, we’ll delve into the details of these transmissions and explore their capabilities, common issues, and what they mean for Dodge enthusiasts.
### Engine and Transmission Pairings
The 7th-gen Dodge Charger is available with a range of powerful HEMI engines, including the supercharged 6.2-liter V8. The 8HP90 automatic transmission is paired with these more powerful engines, such as the SRT Hellcat, and is rated for torque values of up to 1,000 Nm (about 738 pound-feet). This transmission is designed to handle the increased power output of the supercharged HEMI, but it’s also susceptible to internal wear from aggressive driving.
In contrast, the 8HP70 automatic is paired with the naturally aspirated 5.7 and 6.4 HEMI engines, which produce lower torque values. This transmission is rated for torque values of up to 700 Nm (about 516 pound-feet) and is found in Dodge Challenger models starting in 2014.
### Transmission Issues
Both transmissions have their share of common problems. The 8HP70 automatic is prone to failed aluminum pistons and drums, as well as premature wear to seals and bushings. Aggressive driving can also lead to increased wear of the torque converter lock-up clutch. The 8HP90, paired with more powerful engines, is also susceptible to internal wear from aggressive driving.
### Performance and Handling
The 8HP90 automatic transmission is designed to handle the increased power output of the supercharged HEMI, but it’s not without its limitations. The transmission’s ability to handle the increased torque values can be a challenge, especially in heavy acceleration and cornering. However, when driven smoothly, the 8HP90 can provide seamless shifting and impressive acceleration.
The 8HP70 automatic, on the other hand, is better suited for the naturally aspirated HEMI engines. Its lower torque values make it more manageable for everyday driving, and its smooth shifting provides a comfortable ride.
### Conclusion
The 8HP90 and 8HP70 automatic transmissions in the 7th-gen Dodge Charger offer distinct performance characteristics and are suited for different driving styles. While the 8HP90 is designed for high-performance driving, the 8HP70 is better suited for everyday use. As with any transmission, proper maintenance and driving habits can help minimize the risk of common problems. Whether you’re a performance enthusiast or a daily driver, understanding the strengths and weaknesses of these transmissions can help you make an informed decision when choosing your next Dodge Charger.
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