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Welcome to our in-depth guide on late-model Chrysler automatic transmissions. Here, we’ll share details on every Chrysler automatic, starting with the automaker’s first four-speed, the A500 (later renamed to reflect gear count and torque capacity), part of its popular TorqueFlite series.
There’s also the Ultradrive series, the RFE, and the NAG1; each has evolved to include new technologies and designs, such as using electric control systems, ensuring smoother gear shifts, better fuel efficiency, and enhanced performance.
We’ll also touch on the reliability of these automatics and mention some of their common issues. Finally, we put together some Chrysler transmission quick chart guides for your convenience, found at the end of this guide, covering naming codes, torque factors, gear ratios, and weights.
Ready to get started? Let’s dive in.
The TorqueFlite series debuted in 1956, boasting Simpson gear sets and torque converters for smoother shifts and more efficient power transfer.
The original line-up of three-speed automatics expanded in 1988 with the introduction of the four-speed A500. This design would become integral to various late-model vehicles from the '90s and '00s, such as the Dodge Ram, Dakota, and Durango, as well as the Jeep Grand Cherokee.
While it's a bit confusing, understanding Chrysler's transmission codes can clarify the characteristics of each unit.
The "A" in names like A500 or A618 typically stands for "automatic." The subsequent numbers (e.g., "500" or "618") indicate the torque capacity. The terms "RH" and "RE" differentiate between hydraulic (RH) and electronic (RE) control systems, respectively.
For example, within the A618 series, the 47RH refers to the hydraulic variant, while the 47RE denotes electronic, showing an evolution in control systems over time.
With the later 8 series, the "HP" in "8HP70", for instance, indicates "8-speed hydraulic planetary", followed by the torque capacity.
You may find it easier to check out the quick-guide charts at the bottom of this article.
Next, let’s explore each of Chrysler's late-model TorqueFlite automatics, starting with the A500:
The Chrysler Ultradrive transmission series marked the automaker's transition to front-wheel-drive automatics with sophisticated electronic control systems.
Launched in 1989, the Ultradrive offered computer-controlled shifting that adapted to driver inputs for improved performance and fuel economy.
These units were matched with a variety of engines, such as the fuel-efficient 2.4L four-cylinder found in models like the Chrysler PT Cruiser and the powerful 3.6L Pentastar V6 in the Pacifica and Dodge Charger.
To help you better understand the characteristics of this Chrysler transmission series, let's explore each more closely:
The RFE transmission series debuted in 1999, bringing advanced "rear-wheel drive fully electronic" control to Chrysler's rear- and four-wheel drive vehicles.
Renowned for their robust design and adaptability, the RFE transmissions have become synonymous with reliability and precision in power delivery.
The lineup, including variants such as the versatile 545RFE transmission and the heavy-duty 68RFE, was developed to meet diverse driving demands, whether towing a heavy load in a Dodge Ram 1500, hauling kids to soccer practice in a Durango, or crawling over rough terrain in a Jeep Grand Cherokee.
Introduced in 2005, the NAG1 transmission series, also known by its model number W5A580, or simply A580, represented an advancement in Chrysler's approach to automatic transmissions for rear-wheel and all-wheel-drive vehicles.
This five-speed gearbox featured adaptive electronics such as variable line pressure and manual mode capabilities, enhancing shift quality and responsiveness. Its versatility made it a perfect match for the performance-oriented Dodge Charger and the refined Chrysler 300, among others, balancing power delivery with fuel efficiency.
The NAG1's durability and smooth operation have cemented its reputation, making it a valued component in a range of vehicles, including luxury sedans, full-size SUVs, and even police-spec performance models.
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When it comes to reliability, Chrysler's transmissions have a varied track record, each with its own set of common issues and strengths.
The TorqueFlite series is generally regarded for its durability, yet it's not immune to the typical aging woes like seal and gasket leaks and failure due to incorrect fluid levels or pressure.
The Ultradrive series faced early reliability issues, often due to drivers using incorrect fluid and misconceptions over its "limp home" mode.
Subsequent models like the 41TE aimed to enhance reliability with updated components and technology. The 68RFE is robust for heavy-duty use but has problems like torque converter and oil pump malfunctions.
The NAG1 series operates smoothly but requires meticulous maintenance to avoid issues like "Limp Mode" due to low fluid or valve problems.
Ultimately, regular maintenance and attentive care, such as ensuring correct fluid levels and addressing any irregularities promptly, can greatly prolong the lifespans of late-model Chrysler transmissions.
HE | Hydraulic |
E | Electronic |
FE | Full Electronic |
R | Rear-Wheel Drive (RWD) |
L | Longitudinal (RWD) |
T | Transverse (FWD) |
Forward Speeds | Torque Capacity | Drive Type | Control |
3 Through 8 | 0 (Low) - 9 (High) | R - RearL - Longitudinal T - Transverse | H - HydraulicE - Electric |
ZF Trans | Rating in Newton-Meters (NM) | Rating in Pounds-Foot (Lb-ft.) |
8HP30 | 300 | 221 |
8HP45 | 450 | 332 |
8HP70 | 700 | 516 |
8HP90 | 900 | 663 |
8HP95 | 950 | 700 |
Transmission | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Reverse |
Pre-1981 A904 | 2.45 | 1.45 | 1.00 | 2.22 | |||||
904 / A500 / 30RH | 2.74 | 1.54 | 1.00 | 2.22 | |||||
727 / A518 / 36RH | 2.45 | 1.45 | 1.00 | 2.21 | |||||
42RH / 46RH / 47RH | 2.74 | 1.54 | 1.00 | 0.69 | 2.21 | ||||
46RE / 46RH | 2.45 | 1.45 | 1.00 | 0.69 | 2.35 | ||||
545RFE | 3.00 | 1.67 | 1.00 | 0.75 | 0.67 | 3.00 | |||
NAG1 / W5A580 | 3.59 | 2.19 | 1.41 | 1.00 | 0.83 | 3.16 | |||
65RFE | 3.00 | 1.67 | 1.00 | 0.75 | 0.67 | 3.00 | |||
66RFE | 3.23 | 1.84 | 1.41 | 1.00 | 0.82 | 0.62 | 4.44 | ||
8HP70 | 4.69 | 3.13 | 2.10 | 1.66 | 1.28 | 1.00 | 0.84 | .067 | 3.30 |
8HP90 / 8HP95 | 4.71 | 3.14 | 2.10 | 1.67 | 1.29 | 1.00 | 0.84 | .067 | 3.30 |
Transmission | Weight (LBS) |
A904 | 125 |
A727 | 160 |
A500 / 30RH | 147 |
A518 / 30RH | 172 |
46RE / 46RH | 193 |
68RFE | 263 |
8HP90 / 8HP95 | 200 |
And there you have it, the full rundown on late-model automatic Chrysler transmissions; we hope you enjoyed the read.
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