How much torque can the AMG Transmission hold?
07-17-2009, 12:19 AM
#2
The 7-speed 7G-tronic transmission (722.9) has now replaced the most of the 5-speed (722.6) transmissions Mercedes Benz used since 2000. All new N/A V6 and V8 vehicles are now being built with the WA700 variant of the 7G-tronic. The WA700 variant is endurance load rated by Mercedes Benz at 760 Nm (560 lbs/ft) of torque. This means the transmission will handle this amount of power continuously with out failure. There will never be a time where one can develop this kind of power continuously on the road. Momentary load ratings are easily 35 % higher than continuous ratings, and the 7G-tronic transmission will easily handle the performance from a Kleemann conversion. The 7G-tronic has been available since 2004, and Kleemann has modified many of these vehicles. None of these modified vehicles has had any trouble to date, many of them having logged in excess of 64000 km (40000 miles).
07-17-2009, 03:34 AM
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07-17-2009, 03:59 PM
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2008 C63
Ya thats what I was thinkin. But to Yooker.... your knowledge of cars is great 
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07-17-2009, 08:54 PM
#8
560lbs/ft is the limit for continuous application. The quote also states that the limit could easily be 35% higher during full throttle applications, so 560lbs/ft x 1.35 = 756lbs/ft. Since it is impossible to be at full throttle continuously on the road, That 756lbs/ft is most likely the maximum torque limit of the transmission.
This means your peak torque figure of 561lbs/ft is very safe for the 7G-Tronic transmission.
On a side note, BMW's Dual Clutch Transmission (M-DCT) only has a torque limit of 600 Newton Meters (Nm) which is roughly 442foot pounds of torque.
This means your peak torque figure of 561lbs/ft is very safe for the 7G-Tronic transmission.
On a side note, BMW's Dual Clutch Transmission (M-DCT) only has a torque limit of 600 Newton Meters (Nm) which is roughly 442foot pounds of torque.
Last edited by yooker; 07-17-2009 at 09:00 PM.
