4L60E vs 722.6: Differences and Which One to Choose
The GM 4L60E and the Mercedes-Benz 722.6 are two of the most widely produced rear-wheel-drive automatics on the road, but they come from completely different worlds. The 4L60E is a GM four-speed found in Chevy and GMC trucks, the Corvette, and countless rear-drive cars. The 722.6, badged 5G-Tronic by Mercedes and NAG1 by Chrysler, is a five-speed used across Mercedes, Jeep, Dodge, Jaguar, and Porsche. Because these units almost never appear in the same vehicle, this is best understood as an application and identification comparison: knowing which one you have, how they differ mechanically, and which platform each belongs to. Here is how they stack up.
Parts for your 4L60E
Architecture at a Glance
The 4L60E is a four-speed, electronically controlled automatic derived from the earlier 700R4/4L60. It uses a Simpson-style gear train with a 2-4 band, multiple clutch packs, and an electronic valve body that controls shift timing, line pressure, and torque converter clutch (TCC) lockup through the PCM. It debuted in 1993 and ran through 2014 in various forms.
The 722.6 is a five-speed, fully electronically controlled automatic that Mercedes introduced in 1995 and built through 2014. It is a band-less design that uses friction clutches throughout: three compound planetary gear sets, three driving (locking) clutches, three disc brakes, and two overrunning (free-wheel) clutches, with fifth gear serving as overdrive. Its control electronics are integrated into the valve body, and Chrysler applications refer to the same unit as the NAG1.
Gearing and Ratios
The 4L60E is a four-speed with these ratios: 1st 3.059, 2nd 1.625, 3rd 1.000, 4th 0.696 (overdrive), and reverse 2.294. The extra ratio is the headline difference on the 722.6, which is a five-speed. A representative 722.6 ratio set is 1st 3.595, 2nd 2.186, 3rd 1.405, 4th 1.000, 5th 0.831 (overdrive), and reverse 3.167. The 722.6's deeper first gear and additional ratio give it a broader spread, which suits the heavier, higher-revving European platforms it was designed around.
Torque Capacity
The 4L60E is rated around 350 lb-ft (about 488 N-m) of nominal engine torque in stock form; its stronger 4L65E and 4L70E siblings step that up to roughly 380 and 400 lb-ft. The 722.6 was built in multiple strength tiers: the "small NAG" versions handle up to roughly 350 N-m, the "large NAG" versions up to about 600 N-m, and AMG-specific builds were rated well beyond that. In practical terms, a heavy-duty 722.6 was engineered to sit behind large-displacement and AMG engines, while the 4L60E lives in the light-to-medium-duty GM range and gives way to the 4L80E when GM needed more capacity.
Applications and How to Identify Each
The 4L60E is almost exclusively a GM part: Silverado and Sierra trucks, Tahoe, Suburban, the C5 Corvette, Camaro, and various Pontiac and Cadillac rear-drive models. If your vehicle is a rear-drive GM from 1993-2014 with a four-speed automatic, it is very likely a 4L60E family unit.
The 722.6 is a Mercedes-Benz design that spread across brands. You will find it in Mercedes C-, E-, S-, and SL-Class models, plus Chrysler-group vehicles such as the Jeep Grand Cherokee and Dodge Charger (as the NAG1), and in some Jaguar and Porsche applications. One identification tip: German-built units typically carry a pin stamp on the driver's side, while Chrysler-built NAG1 units carry a bar-code tag instead.
Which One Should You Choose?
In most cases the vehicle chooses for you, because these transmissions are not interchangeable between platforms. The decision comes into play when you are planning a swap or a build:
- Building a rear-drive GM truck, Corvette, or muscle car? The 4L60E is the natural fit. Parts are everywhere, it bolts to the GM small-block and LS families, and it upgrades cleanly. If you need more torque capacity than a 4L60E offers, step to a 4L80E rather than crossing brands.
- Working on a Mercedes, or a Jeep/Dodge with the NAG1? The 722.6 is the correct unit and is engineered for those chassis, wiring, and control systems. Its five-speed spread and heavier-duty variants are matched to those vehicles.
- Want an extra overdrive ratio and a band-less design? That is the 722.6's territory, but only within the platforms it was built for.
If you are working on the GM side, our 4L60E rebuild kits and overhaul parts cover everything from basic reseals to master-level clutch and steel sets. For a deeper GM-family comparison when you are weighing capacity, see 4L60E vs 4L80E: which GM transmission should you run.
Rebuild Effort and Cost Framing
Both units are full-teardown rebuilds when internal clutches or planetaries fail, which is a job for an experienced builder or a shop. The 4L60E is one of the most rebuild-friendly automatics ever made: parts availability is excellent, the core is common, and DIY-level teardown guides are plentiful, so labor time and parts cost tend to be lower. The 722.6 is more specialized, its conductor plate and valve-body electronics require careful handling, and it generally demands Mercedes/Chrysler-specific procedures and fluid (ATF MB 236.14 spec), so plan on more shop time and platform-specific knowledge.
Frequently Asked Questions
Can you swap a 722.6 in place of a 4L60E?
Not practically. They mount to different engine families, use different bellhousing patterns, wiring, and control systems, and were never designed to interchange. For a GM rear-drive vehicle, stay within the GM family (4L60E or 4L80E).
Which is stronger, the 4L60E or the 722.6?
It depends on the variant. A base 4L60E is rated around 350 lb-ft, and heavy-duty "large NAG" 722.6 units were built to handle substantially more torque behind large and AMG engines. Compare the specific variant, not just the family name.
Is the NAG1 the same as the 722.6?
Yes. NAG1 is the Chrysler-group name for the Mercedes 722.6 (5G-Tronic). The core design is shared; identification tags differ between German-built and Chrysler-built units.