What is Torque Management?

[evadllig]

Hi Everyone,

I just wanted to clarify what is torque management and how it works. My understanding is this:

1 - TM is controled in the ECM not the TCM

2 - What TM does is reduce spark? timing? in order to "soften" shifting to lessen strain on the transmission.

3 - Most of the strain to a transmission would be at high RPM shifts (4000 and up) vs. low RPM shifts (1500 to 4000).

4- Removing TM would creat a greater risk to people driving aggressively vs. just simple commuting (i.e. high vs. low RPM shifts.)

5 - Also what does the TCM do? Does it just control shift points and pressure?

Someone please let me know if I got this right or am I way off base...

Thanks for all of your help....
Dave

[GTPprix]

1- Well actually technically it's both BUT the ECM has final say as far as how much timing is pulled via a few lookup tables.

2- Well thats part of it, the term TM is thrown around so much these days that it gets confused with launch spark, differential scoring protection and other "abuse" mode calibrations that it all gets drawn together but for purpose of discussion thats a pretty good start ;)

3- True but even no TM on part throttle shifts can take a toll, it's all about how it's setup really.

4- Most likely yes, but I dont know many people who bought these not to have a little fun with em ;)

5- It completely controls the Transmission, shift points pressure shift speed/rpm ect. So yes you are correct.

[Blades]

Nice post Chris. Since this a great TqM info thread, I gotta add that you remove 40-50%.

I removed 75% and a little bit more down low. At around 1560RPMs it has 50% TqM.. I zeroed that out. I gotta say, if this amount of 'power' is prone to break the car, I'll never buy another GM again. What a *****-ass transmission. I find it troubling that TqM is essentially robbing the HP.. whats the point of doing mods if it means increasing the TqM to compensate? :mad:

[evadllig]

Chris

Thank you very much for the great info. Always good to know that I am not quite as stupid as I think.

Blades

Also thanks for the insight on percentages....


Dave

[mcss383]

What a *****-ass transmission. I find it troubling that TqM is essentially robbing the HP.. whats the point of doing mods if it means increasing the TqM to compensate? :mad:
My thoughts exactly. I would love to drop a modified 200-4R in the TB and be done with it. Why did GM not put the 4L80E in here? That is a good tranny!

[B4U]

Because it's huge, heavy as hell, and uses a ton of horsepower just to operate it.

My thoughts exactly. I would love to drop a modified 200-4R in the TB and be done with it. Why did GM not put the 4L80E in here? That is a good tranny!

[TuneTimePerformance]

Because it's huge, heavy as hell, and uses a ton of horsepower just to operate it.LOL...But they hold up quite well. We can work with what we have.
I realy have to think that some of the 4l70e's had some under par parts [No... not GM ] and thats what caused the failure's.

[ScarabEpic22]

My thoughts exactly. I would love to drop a modified 200-4R in the TB and be done with it. Why did GM not put the 4L80E in here? That is a good tranny!
I think the reason GM didnt use the 4L80E is because it is larger than the 4L60E/4L65E/4L70E footprint.

[mcss383]

So what, it is bigger for a reason, it is stronger!! But ok, they don't want the weight. How about tooling up some billet parts like what the aftermarket has for 4l60's, that would at least make it stronger without adding weight. It just annoys me that GM puts a tranny in a vehicle that is not capable of surviving without a boat load of electronic nannies that defeat the whole purpose of having a performance vehicle, especially since they have parts on the shelf that can address the problem!

[John Skiba]

I don't think there is a new vehicle on the market that doesn't have a boat load of nannies.

[Trailblazer1]

the deficiencies of the gm design is why we get our butts handed to us by the Jeep GC SRT-8. It would be interesting to know how much torque management is in their setup...there has to be some reason besides the 5% more horsepower that that vehicle is sooooo quick.

[GTPprix]

Well the 5% more power and the HUGE converter they have in there helps alot hehe I think thats the reason for no towing..

[B4U]

I've pondered this and I think the fact that it has a 5 speed auto instead of a 4 speed allows the SRT-8 Jeep to stay in it's power band better when accelerating. More optimum gearing basically.

[Hawaiian SS]

I don't think there is a new vehicle on the market that doesn't have a boat load of nannies.

I agree, if GM did it "right" as some people on here say, The TBSS would be a $50,000 SUV and out of reach for most people.

[Blades]

How so? I am sure that a beefed up tranny with less 'nannies' would not cost 10K to produce over our 'stock' tranny. It could be argued that with a beefed up tranny they would eventually save money by reduced repair costs.

[Hawaiian SS]

Not just the trannies, but the other things people don't like about the TBSS that want fixed (nicer interior/build quality/C6 intake/Dual exhaust/ETC). I like mine though and have no major gripes.

[mcss383]

I agree, if GM did it "right" as some people on here say, The TBSS would be a $50,000 SUV and out of reach for most people.
Unless you would have to change the floor pan, going to a 4l80 might add a couple hundred bucks to the price tag.