Mercedes-Benz 5G-Tronic transmission

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Manufacturer Daimler AG
Chrysler Group LLC
Production 1990–Present
Body and chassis
Class 5-speed longitudinal automatic transmission
Predecessor 722.5 & 4G-Tronic
Successor 7G-Tronic

The Mercedes-Benz 5G-Tronic (also called 722.6) is an electronically shifted 5-speed overdrive automatic transmission with torque converter lockup that replaced the older 722.5 5-speed hydraulic transmission and most of the 4-speed 4G-Tronic transmissions. It is in the process of being replaced by the Mercedes Benz 7G-Tronic 722.9 transmission which was introduced in 2003. However, all V12-powered cars such as the S600 and S65 AMG still retain the 5G-Tronic, which has a torque capacity of 796 lb-ft, as the newer 7G-Tronic is limited to 542 lb-ft, not enough to handle the torque from the V12 engine.[1] Also, while rear-wheel drive W211 E-Class cars have adapted the 7G-Tronic, those with 4Matic retain the five-speed automatic, although the current generation W212 E-Class released for the 2010 model year has dropped the 5G-Tronic entirely, except for four-cylinder models.

In Chrysler applications this transmission is identified as the New Automatic Gearbox Generation One, or NAG1.


Gear ratios[edit]

Mercedes-Benz Transmissions
Gear 1 2 3 4 5 R1 R2
5G-Tronic (W5A330/Small NAG)[2] 3.951 2.423 1.486 1.000 0.833 -3.147 -1.93
5G-Tronic (W5A580/Large NAG)[3] 3.595 2.186 1.405 1.000 0.831 -3.167 -1.926

Special operating modes[edit]

Speedshift (2001-)[edit]

A performance feature set for the Mercedes-Benz transmissions, which includes manual mode, active downshifting. When cornering at high speed, the transmission maintains the same gear above a certain lateral acceleration level. It can also automatically downshift before overtaking.

It was first used in 2001 Mercedes-Benz C 32 AMG.,[4] 2001 Mercedes-Benz SLK 32 AMG.[5]

AMG Speedshift (2002-)[edit]

A version with mechanical lock-up of the torque converter from first gear, steering-wheel-mounted shifter. AMG Speedshift is also used in 7G-Tronic transmission.[6]

It was first used in 2002 Mercedes-Benz E 55 AMG, S 55 AMG, C55, CL 55 AMG.[7]

AMG Speedshift R[edit]

A version used in Mercedes-Benz SLR McLaren. It includes 3 manual modes.



External links[edit]