• With decades of experience, Mopar and the NAG1 transmission conquer mountains and the street. A leader in aftermarket parts, MOPAR is famous for its ease of installation and quality. NAG1 and other transmissions from Gearstar keep your Jeep or Challenger focused on the end game.
• The W5A580 or WA580 is a NAG1 series automatic transmission. This transmission is electronically controlled with a triple disc clutch system for driving and an additional two freewheeling clutches. The W5A580 has 5 speeds with a fifth-year that was meant to be an overdrive.
• AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION DESCRIPTION The NAG1 automatic transmission is an electronically controlled 5-speed transmission with a lock-up clutch in the torque converter. The ratios for the gear stages are obtained by 3 planetary gear sets. Fifth gear is designed as an overdrive with a high-speed ratio. NAG1 Automatic Transmission.

• Nag1 Transmission Fluid
• Nag1 Transmission Fill Graph

We have written several articles about the NAG 1 five-speed automatic transmission used in Dodge, Chrysler and Jeep vehicles. It comes in both two-wheel drive and four-wheel drive configurations and may also be referred to as the WA580, W5A580, 5G-Tronic or 722.6 transmission. The NAGI automatic transmission (NAG1 Automatic Transmission) is an electrically controlled 5-speed transmission with a lock-up clutch in the torque converter. The ratios for the gear stages are obtained by 3 planetary gear sets. Fifth gear is designed as an overdrive with a high-speed ratio.

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Nag1 Transmission Fluid

Read MoreSouthern HotRod War Viking GEN III NAG1 Transmission SRT8 Jeep

Nag1 Transmission Fill Graph

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PCS Transmission Control Unit:

NAG1: Prices start at 1200.00

We specialize in the standalone Transmission Control Unit (TCU) for the 722.6, W5A580, or NAG1 transmission. We offer two different kits for this transmission. One using the factory TCM and Shifter. This is a much more plug n play option and the full standalone PCS TCM-2800. This transmission is found in Mercedes-Benz models from the late 1990’s through 2008 (depending on model and options), the Dodge/Chrysler line up (5.7 and 6.1 SRT8 300c, Charger, Challenger and in Jeep Cherokees), and in select Porsche and Jaguar models.

8hp: Prices start at 1000.00

Now supporting 8hp swaps with the FCA units only. We support swaps with factory take out ECMs, crate motor ECMs, and full standalone conversions. Factory FCA 8hp shifters from the Charger, Challenger or Ram must be used. TPS and RPM and brake switch are the minimum requirements.

5hp: Prices start at 940.00

Support for the ZF 5hp line of transmissions has been added. We have base calibration for all versions and now have complete wiring harnesses so no donor harness is required.