Torque Management Opinions

[2 E L O]

I recently reprogrammed my Tahoe with the Hypertech Max Energy. I did the regular fuel tune, increased shift points 200-300 rpm and the rev limiter by 500 rpm to make room for the higher shift points, and also increased the shift firmness.

This programmer just had a yes/no preference to increase the shift firmness--not different levels of torque management removal. I've been reading all I can about this Hypertech and I can't find anything that says exactly how dramatically it removes the torque management. I know the shifts are very snappy now, even at very low/part throttle...

I realize the snappier shifts are better for the tranny (less friction/heat generation) but how harmful are they on the rest of the drivetrain like the u-joints and the rear-end? How durable are these parts from the factory? Are they going to last 100k+ miles with the snappier shifts? Do you think I should reprogram it back to stock shift firmness?

 

[73shark]

I don't think TMgmt affects the firmness of the shifts. It dials back fuel and timing when you mash it. Shift firmness is affected by line pressure so I suspect your Hypertech is raising the line pressure. Could be wrong and will defer to someone who really knows what's going on.

 

[2 E L O]

I don't think TMgmt affects the firmness of the shifts. It dials back fuel and timing when you mash it. Shift firmness is affected by line pressure so I suspect your Hypertech is raising the line pressure. Could be wrong and will defer to someone who really knows what's going on.

From my understanding, there are several different scenarios that bring torque management into play including hard launches and WOT upshifts/downshifts. When TM is enabled, the PCM thinks you are being abusive, and either pulls timing or closes the throttle body to kill power.

 

[73shark]

Yep, I forgot about the throttle-by-wire function. That probably accounts for most of the lack of zip.

 

[JennaBear]

I don't think TMgmt affects the firmness of the shifts. It dials back fuel and timing when you mash it. Shift firmness is affected by line pressure so I suspect your Hypertech is raising the line pressure. Could be wrong and will defer to someone who really knows what's going on.

X2

The Hypertech does increase line pressure, but it does so by altering the force motor current table. It tricks the computer into thinking it needs less current to provide a specific pressure level than it actually does.

 

[2 E L O]

X2

The Hypertech does increase line pressure, but it does so by altering the force motor current table. It tricks the computer into thinking it needs less current to provide a specific pressure level than it actually does.

Thanks! Glad to clear this up...

So is it safe or is it going to damage my Tahoe in the long run?

 

[73shark]

From everything I've heard and read says that firmer shifts actually prolong clutch life due to less slippage. Of course that may transmit a little more shock to the rest of the drive train but probably negligible unless you really get crazy with it.

JennaBear can probably either verify this or just blow it completely out of the water.

 

[JennaBear]

All depends on how you drive it really. But yes as said, firmer shifts will prolong the life to an extent. If they are too firm you can run the risk of damaging transmission "hard parts", u joints, and differentials.

If you wanted to really beef up the parts a bit, you could install an HD2 Shift Kit and a Corvette Servo. Or a better tranny....