Torque Management

[o4yukonxl]

I hear a lot of reference to torque management, can someone explain how it works and why it's used on new vehicles? What are the advantages/disadvantages to eliminating it?

[02denali]

it is the pcm's ability to retard the spark or timing when the vehicle shifts or it isees that it is being abused. there are many tables and reasons that it can pull timing. deleting it requires tranny mods so it will last.the main reason for eliminating it is to get the most of the performance. you will have to install a shift kit and servos to remove it.

[99Silver6.0]

TM is the devil!!! I dont have a shift kit or servos. For a year or so my trannys been fine without TM! Knock on wood. You dont have to put in a TransGo or servos to kill TM. If you get a shift kit and servos its best to take TM out or the truck falls on its face during shifts. Just zero out the values in the Torque Reduction table under Trans Calibration, the Torque Reduciton table under Ignition, change max torque # to 1000 under the Ignition tab. Increase Abuse Mode RPM. And zero out the Upshift Torque Reduction table under Trans Calibration. You can take a % of it out if you like instead of a majority of it.. When its all said and done, you will want the TransGo and servos!!!!

[2ksleeper]

Here is a explanation that I found posted awhile back that someone got out of a gm manual.

 

Quote:

With the GEN III VS engine, Torque Management is a function of the PCM that reduces engine power under certain conditions, included in which, is the transmission upshifts and downshifts.

Torque Management is performed for the following reasons:

1. To prevent overstress of the powertrain components.

2. To prevent damage to the vehicle during certain abusive maneuvers.

3. To reduce engine speed when the IAC is out of the normal operating range.

The PCM monitors the following sensors and engine parameters to calculate engine output torque;

§Air/Fuel ratio

§ Mass Air Flow

§ Manifold Absolute Pressure

§ Intake Air Temperature

§ Spark Advance

§ Engine Speed

§ Engine Coolant Temperature

§ A/C Clutch Status

The PCM monitors the torque converter status, the transmission gear ratio, and the engine speed in order to determine if torque reduction is required. The PCM retards the spark as appropriate to reduce engine torque output if torque reduction is required. The PCM. also shuts off the fuel to certain injectors to reduce the engine power In the case of an abusive maneuvers.

Instances when engine power reduction is likely to be experienced, are:

a. During transmission upshifts and downshifts.

b. Heavy acceleration from a stand start

c. The IAC is out of the normal operating range.

d. When the driver is performing stress-inducing (abusive) maneuvers such as shifting into gear at high throttle angles or shifting the transmission from reverse to drive to create, a rocking motion. The driver is unlikely to notice the torque management actions in the first two instances. The engine power output will be moderate at full throttle in the other two cases. The PCM calculates the amount of spark retard necessary to reduce the engine power by the desired amount. For example the PCM disables the fuel injectors for cylinders 1, 4, 6, and 7 in the case of an abusive maneuvers.

[99Silver6.0]

With the GEN III VS engine, Torque Management is a function of the PCM that reduces engine power under certain conditions, included in which, is the transmission upshifts and downshifts.

Torque Management is performed for the following reasons:

1. To prevent overstress of the powertrain components.

2. To prevent damage to the vehicle during certain abusive maneuvers.

3. To reduce engine speed when the IAC is out of the normal operating range.

The PCM monitors the following sensors and engine parameters to calculate engine output torque;

§Air/Fuel ratio

§ Mass Air Flow

§ Manifold Absolute Pressure

§ Intake Air Temperature

§ Spark Advance

§ Engine Speed

§ Engine Coolant Temperature

§ A/C Clutch Status

The PCM monitors the torque converter status, the transmission gear ratio, and the engine speed in order to determine if torque reduction is required. The PCM retards the spark as appropriate to reduce engine torque output if torque reduction is required. The PCM. also shuts off the fuel to certain injectors to reduce the engine power In the case of an abusive maneuvers.

Instances when engine power reduction is likely to be experienced, are:

a. During transmission upshifts and downshifts.

b. Heavy acceleration from a stand start

c. The IAC is out of the normal operating range.

d. When the driver is performing stress-inducing (abusive) maneuvers such as shifting into gear at high throttle angles or shifting the transmission from reverse to drive to create, a rocking motion. The driver is unlikely to notice the torque management actions in the first two instances. The engine power output will be moderate at full throttle in the other two cases. The PCM calculates the amount of spark retard necessary to reduce the engine power by the desired amount. For example the PCM disables the fuel injectors for cylinders 1, 4, 6, and 7 in the case of an abusive maneuvers

 

All that equals a pain in the butt! The more you mod your truck the more noticable TM is. Thats why I dumped it. TM is a band-aid for that thing they call the 4L60E!

[o4yukonxl]

What's interesting is that the 8.1 comes with the 4L85E which is rated at 460ft lbs. Well under the maximum output of the 8.1. Why? Just to protect their simple 3 year warranty, they make life miserable for us. I need a PCM change.

[greentahoe]

Ijust put in my Wester's yesterday. Although Its programmed for the stall Im putting in next weekend It still drives incredibly different! Its worth every penny. It's hard to believe its the same truck! I had the hypertech before and I thought it helped quite a bit. The wester's is awesome. I have a tahoe and it spins the tires without the converter!! Its going to be sick with the converter!! I got all the torque management deleted and the 93 tune. I cant say enough about it. $500 was a deal!! You will not believe what a simple PCM swap can do!!!

[Mike's 01WS6]

Before you start claiming this is GM's band-aid and thats a pos, know what your talking about. ALL MANUFACTURERS ARE USING TORQUE MANAGEMENT!!! Benz uses it on the s600, a $130,000 car.

[99Silver6.0]

Before you start claiming this is GM's band-aid and thats a pos, know what your talking about.  ALL MANUFACTURERS ARE USING TORQUE MANAGEMENT!!!  Benz uses it on the s600, a $130,000 car.

And your point would be what?? Ive been without TM for 2 years! My tranny is fine! There are more people around wihtout TM than you could ever imagine. I know quite a few. Even people with TM present trash their tranny. Hows that for a band-aid? So watch who your calling a loser buddy!

[SportSide 5.3]

i know some hemi guys who have taken off tq man. on their trucks and gained about a half a second in the quarter.

[o4yukonxl]

I also own a 330i with a 5 speed and I can guarantee you it does not have torque management. It's apparently used to protect automatics under warranty. I had a built plymouth GTX 440 that put out over 550 HP and it had an automatic without any torque management. All it proves is that manufacturers are using electronics to protect themselves at the expense of performance.

[99Silver6.0]

All it proves is that manufacturers are using electronics to protect themselves at the expense of performance.

 

Trying to keep from having to put a tranny in your car/truck at GM or whoevers expense while its under warranty. They didnt have TM back in the days of the Powerglide or 350 Turbo.

[03Bowtie]

Before you start claiming this is GM's band-aid and thats a pos, know what your talking about.  ALL MANUFACTURERS ARE USING TORQUE MANAGEMENT!!!  Benz uses it on the s600, a $130,000 car.

And your point would be what?? Ive been without TM for 2 years! My tranny is fine! There are more people around wihtout TM than you could ever imagine. I know quite a few. Even people with TM present trash their tranny. Hows that for a band-aid? So watch who your calling a loser buddy!

99Silver5.3, you seem to be extremely defensive whenever someone has an opinion different than yours, and then you start insulting people. Is this the direct result of your lack of size downstairs? There's no need for insults and namecalling on this forum, and it's extremely childish. Although TM is a pain in the arse, it IS designed to extend the life of the tranny and drivetrain and with all the import companies sporting 10yr/100,000 mile warranties, it's no wonder Chevy is doing anything they can to try to make our trucks last longer. I'm sure there would be a hell of a lot more people griping on this board if their transmissions were falling out from repeated misuse and abuse. The bottom line is building a more reliable truck. They are succeeding. If you want an all-out tire-roasting drag truck, then you shouldn't have bought a new one in the first place. Quit yer whining you candy-ass.

[k1500chevy97]

Before you start claiming this is GM's band-aid and thats a pos, know what your talking about.  ALL MANUFACTURERS ARE USING TORQUE MANAGEMENT!!!  Benz uses it on the s600, a $130,000 car.

And your point would be what?? Ive been without TM for 2 years! My tranny is fine! There are more people around wihtout TM than you could ever imagine. I know quite a few. Even people with TM present trash their tranny. Hows that for a band-aid? So watch who your calling a loser buddy!

99Silver5.3, you seem to be extremely defensive whenever someone has an opinion different than yours, and then you start insulting people. Is this the direct result of your lack of size downstairs? There's no need for insults and namecalling on this forum, and it's extremely childish. Although TM is a pain in the arse, it IS designed to extend the life of the tranny and drivetrain and with all the import companies sporting 10yr/100,000 mile warranties, it's no wonder Chevy is doing anything they can to try to make our trucks last longer. I'm sure there would be a hell of a lot more people griping on this board if their transmissions were falling out from repeated misuse and abuse. The bottom line is building a more reliable truck. They are succeeding. If you want an all-out tire-roasting drag truck, then you shouldn't have bought a new one in the first place. Quit yer whining you candy-ass.

 

No more bitchin either of you. or ill have to start bustin caps in some asses

[99Silver6.0]

99Silver5.3, you seem to be extremely defensive whenever someone has an opinion different than yours, and then you start insulting people.  Is this the direct result of your lack of size downstairs?  There's no need for insults and namecalling on this forum, and it's extremely childish.  Although TM is a pain in the arse, it IS designed to extend the life of the tranny and drivetrain and with all the import companies sporting 10yr/100,000 mile warranties, it's no wonder Chevy is doing anything they can to try to make our trucks last longer.  I'm sure there would be a hell of a lot more people griping on this board if their transmissions were falling out from repeated misuse and abuse.  The bottom line is building a more reliable truck.  They are succeeding.  If you want an all-out tire-roasting drag truck, then you shouldn't have bought a new one in the first place.  Quit yer whining you candy-ass.

 

Defensive? No. He expressed his point and I expressed mine. Thats it. I did in no way shape or form call anyone names or insult anyone. I believe you are referring to yourself. You are doing the name calling and you are doing the insulting. I didnt buy a new truck. What I do with it is my business. What others do with theirs is their business. All I was implying is there is an over abundance of truck and car owners that run without TM with no problems. Alot! Gee, let me appologize if I ofended you! Im not gonna run and cry because you lashed out at me on a message board.

 

Arguing on the net is like being in the special olympics. Even if you win, your still a retard.