Purpose of t.m.c.

tmaj1865 · December 17, 2004

Can any body shed some light on the function and the purpose of the torque managment control system???. Was wondering why some of the programmers are taking this out and why GM put it in. Thanks Mike

vhato · December 18, 2004

Can any body shed some light on the function and the purpose of the torque managment control system???. Was wondering why some of the programmers are taking this out and why GM put it in. Thanks Mike

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Torque Management, by design protects the transmission from the drivers right foot. While accelerating, torque management sees you want positive throttle, but determines how much HP you will use. If you stomp the gas torque management knows you want all your HP going to the rear wheels right now, but it decides to give you just enough to satisfy your need based on weaknesses in the transmission.

A brilliant way of strengthening a transmission that requires no $$$$ from GM. HD trucks with the 6.0 engine have a 15-20 lbft torque loss and 25-30 HP loss due to torque management.

tmaj1865 · December 18, 2004

Can any body shed some light on the function and the purpose of the torque managment control system???. Was wondering why some of the programmers are taking this out and why GM put it in. Thanks Mike

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Torque Management, by design protects the transmission from the drivers right foot. While accelerating, torque management sees you want positive throttle, but determines how much HP you will use. If you stomp the gas torque management knows you want all your HP going to the rear wheels right now, but it decides to give you just enough to satisfy your need based on weaknesses in the transmission.

A brilliant way of strengthening a transmission that requires no $$$$ from GM. HD trucks with the 6.0 engine have a 15-20 lbft torque loss and 25-30 HP loss due to torque management.

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So you are saying that if you reprogram your pcm, you run the possibility of frying your transmission?

vhato · December 18, 2004

Yes and No. Dodge and Ford do not incorporate Torque Management and GM didn't either until 1996. You can remove it and increase the "possibility" of transmission damage. Just because you have Torque Management doesn't mean you can't blow your tranny AND if you remove Torque Management it could last forever. Torque Management, by design, attempts to reduce the possibility of transmission damage.

Chris97K1500 · December 18, 2004

Just get your tranny upgraded with a good shift kit like Transgo then get a custom tune to remove TQM and utilize the shift kit. I removed TQM without getting my tranny upgraded with a shift kit, 2nd gear went out while towing, but I had the wrong gearing for the 35's I've got. Since regearing w/ 4.56's, getting a Transgo shift kit, and Wester's reprogramming for these, I have nice quick WOT upshifts with good power at all rpm's. One thing I notice, on wet pavement, this combo can become interesting if I get on it too much. Never had the ability like I do now. IMO, if you run your truck a WOT all day long with hard shifting, tranny will eventually fail. But to remove TQM for the occasional heavy right foot, I don't see it being a problem. It's amazing what you gain by just removing TQM. Chris

Mark_in_Tulsa · December 18, 2004

Yes and No. Dodge and Ford do not incorporate Torque Management and GM didn't either until 1996. You can remove it and increase the "possibility" of transmission damage. Just because you have Torque Management doesn't mean you can't blow your tranny AND if you remove Torque Management it could last forever. Torque Management, by design, attempts to reduce the possibility of transmission damage.

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I don't know about Ford, I belive they do now in the new F150

But Dodge has had it since the 4.7 came out in 98 or 99.

And the Hemi has a tone of it. They want to make sure the tranny last the 72000, miles of the warranty.

builderpaul · December 18, 2004

So you are saying that if you reprogram your pcm, you run the possibility of frying your transmission?

Yes there is a greater chance of frying your transmission but it is all up to you and how you drive.

It is like any machine if you continually abuse it it will break. GM has figured none of us know how to drive and will break our equipment. They have just added the TM to prevent us from our own lack of control.

Just an off topic question: How do I spell check these posts?

Butch 02 Denali · December 18, 2004

Any of the custom tuners will leave just enough shift torque management in to be completly safe. It can be 100% removed if you ask, but you better have the tranny built with better and more chutch Packs, or at least a shift kit.

tmaj1865 · December 18, 2004

Any of the custom tuners will leave just enough shift torque management in to be completly safe. It can be 100% removed if you ask, but you better have the tranny built with better and more chutch Packs, or at least a shift kit.

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Does any one know the week points of an 4L80. Most shift kits that I know of you just rerout fluid and increased line pressure to make the shift soliniods move faster. I would think the better way would be to increase the number of friction disc and use better material on the week links in the trans. Am I thinking wrong on this???

Just to let you all know I have a 2001 HD 4x4 with a 6.0, I don't dog it but I do pull a 24 foot tag enclosed car trailor, it weighs approx 8500lbs with car and tools etc. So I'm just wondering where I can get more torque for pulling, besides buying a diesel, thought I would put that in before some else did. Thanks for all of your inputs. Mike

vhato · December 18, 2004

Here is another fact, you still can pack more "thinner" clutches. The benefit is the ability to transfer MORE Torque, but the problem is the thinner discs wear faster reducing transmission life. Give or take. The MAIN weak point is the 4 gear planatery. It is larger than the 4L60-E's, but the larger 5-gear version is plain stronger.

The key to transmission life is fluid. The more the merrier and the cooler the better. That is why Tranny coolers combined with those aftermarket "shift" kits are so popular. More, cooler fluid can reach key areas faster. Bascially what you already know.

tmaj1865 · December 18, 2004

The MAIN weak point is the 4 gear planatery. It is larger than the 4L60-E's, but the larger 5-gear version is plain stronger.

Who makes 5-gear planatery????

vhato · December 18, 2004

The MAIN weak point is the 4 gear planatery. It is larger than the 4L60-E's, but the larger 5-gear version is plain stronger.

Who makes 5-gear planatery????

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A few companies that stock tranny poarts have them. A quick search on the internet for transmission parts will bring up MANY retailers.

I shouldn't have said the 5-gear is stronger because that isn't true. The advantage to it is torque is tranfered over 5 gears instead of 4 gears allowing each gear to transfer less power, thus making it not as weak.

However, the 4 gear Planatery isn't weak in the 4L80-E. It is huge and can handle tons of torque, but once you start dropping 500 lbft of torque into it, the 5 gear looks better. Just like the 4L60-E's 4 gear is plenty strong. Once you exceed 400 lbft torque the 5 gear unit will be better suited. You follow me?

tmaj1865 · December 18, 2004

Thanks for the input, I guess all trans have their weak points, I've rebuilt several turbo 400 and always replace the sprag, the were the weakest part and just a little bit of torque and they rolled. I think its kinda of weird that factory put a program into the computer to remove torque and power to save the trans when they should have put better parts in the trans. But the program is cheaper. Big business. Thanks Mike

Scyry · December 18, 2004

Quick question about the 5-speeds, do they have TM too? Just wondering, because I feel that my 2001 is more peepy than my Dad's 2003 with the automatic in it. We seem to have the same RPM's at the same speeds and everything; I have the 4:10 and am not sure what my Dad has.