Duramax Torque Management
So I know there's a lot of talk about Tq management on these forums. For those who aren't familiar with the term, "torque management" is a term used to describe the situation when a manufacture...
Forum Discussion
Grit dog wrote:
Agree with the torque the new trucks have, they don't need it all off the line, but your statement about the drivetrain needed to handle it is not really accurate. I've been putting down more power than the new trucks for over 150kmi in my 07 without any torque mgmt or "drivetrain" upgrades save for a better clutch which was/is known as a weak point.
I am putting down more than the new ones as well, but not in lower gears just as I am certain you aren't putting all of your power to the ground in 1-3rd gears. Your drivetrain cannot handle all the power you make in 1st gear, at least not for long. The G56 is a good trans but it's not as stout as the NV5600 and NV5600 can't handle that power in 1st long term either. That's all assuming enough traction to hold as well.
I'm not sure G56 you have, but even the late version would be putting over 5,000 lb/ft to the x-case and u-joints with 900 lb/ft at the engine. Based on my last dyno I'm closer to 1000 at the crank than 900. The stock driveline is tough but not that tough. One also has to look at longevity and durability vs catastrophic failure.
The newer trucks use a 1550 series u-joint that is supposed to be quite a bit stronger than the 1480's that came on manual trans 3rd gen 5.9. The 1480's have a continuous torque rating of 2000 lb/ft. My one piece driveshaft also has 1550's.
The BD will reduce TQ management but it doesn't remove it completely, just like other tuners. Even with UDC Pro or EFI Live there isn't a table to remove it. We can do things to make more power at lower speeds and rpms but that's what we have access to right now. We can really do a lot with custom tuning but more on the automatics than manuals as the tables we can adjust effect them more and in some instances aren't even used on manuals.
EDIT: Well I thought I'd search again really quickly and finally found some more specs on 1550's.
1410's (auto HPCR 5.9's not sure of all years). Cont rating 820. Short Duration 1,500. Elastic Limit 2,700.
1480's Cont rating 1,100. Short Duration 2,000. Elastic Limit 3,300.
1550's Cont rating 1,400. Short Duration 2,400. Elastic Limit 4,400.
1410's and 1480's are considered medium duty and 1550's are heavy duty.
That's just u-joints and not even looking at what torque the ring and pinion can handle, or the trans. The G56 is known for getting hot and enlarging bearing openings with higher than stock power.
