Mercedes-Benz 722.6 5-Speed Automatic Transmission (NAG1) · Mercedes-Benz · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
1996–2009 Mercedes-Benz C/E/S/CLK/SLK/ML Class (most models), 2005–2010 Chrysler 300C/Dodge Magnum/Dodge Charger/Jeep Grand Cherokee (5.7L Hemi NAG1)
| Configuration | 5-speed automatic RWD/4WD transmission (NAG1 designation in Chrysler applications) |
|---|---|
| Gear Ratios | 1st 3.59:1 · 2nd 2.19:1 · 3rd 1.41:1 · 4th 1.00:1 · 5th 0.83:1 · Rev 3.16:1 |
| Fluid Type | Mercedes-Benz ATF (MB 236.10) or Mopar NAG1 ATF |
| Fluid Capacity | 9.5 qts total, 4.5 qts service refill |
The 722.6 conductor plate is more complex than earlier versions and fails more often. It is the #1 repair across all applications — Mercedes, Chrysler, Dodge, and Jeep.
Symptoms: Limp mode, P0715/P0720/P0885 DTC, erratic shifts, ETC or TC light on
Solenoids S1–S4 wear individually or in combination. Chrysler/Dodge NAG1 units are particularly susceptible to solenoid pack failure.
Symptoms: Specific gear loss, DTC P0750–P0770 range, harsh or absent shifts in specific gears
TCC shudder is common in both Mercedes and Chrysler/Dodge applications, exacerbated by neglected fluid service.
Symptoms: Shudder at highway cruise, DTC P0740, vibration at 55–70 mph
722.6/NAG1 rebuild replaces conductor plate, solenoid pack, all clutch packs, torque converter, and all seals. Mercedes uses MB 236.10; Chrysler/Dodge/Jeep applications use Mopar NAG1 ATF. Valve body is cleaned and inspected.
Change fluid every 40,000 miles — MB 236.10 for Mercedes applications, Mopar NAG1 ATF for Chrysler/Dodge/Jeep. Do not cross-contaminate fluid types between applications even though the transmission hardware is identical.
They are the same transmission — Mercedes-Benz 722.6 is rebadged as NAG1 in Chrysler/Dodge/Jeep applications. Hardware is identical; fluid specification differs.
Most Mercedes-Benz C/E/S/CLK/SLK/ML Class from 1996–2009, plus Chrysler 300C, Dodge Charger, Dodge Magnum, and Jeep Grand Cherokee with 5.7L Hemi from 2005–2010.
A full rebuild ranges $1,900–$2,500 at Chicago Transmission, covering all applications.
Mopar NAG1 ATF specifically — do not use generic ATF or Mercedes-spec fluid in Chrysler NAG1 applications.
Yes — conductor plate failure or solenoid pack failure causes limp mode. Diagnosis will determine if conductor plate replacement alone resolves it.
Free diagnostic, written estimate, lifetime warranty. Chicago's 722.6 rebuild specialists since 1987.
