Originally Posted By: lexus114
Where are you guy`s getting this information from? Chrysler is big on doing this cut the engine torque to the transmission [censored] because their built so cheap. I dont know any other ones doing this right now. If their are,then I stand corrected.are you getting torque management confused with this? : When Traction is turned off the torque management feature should be disabled. It's just a software function of the traction control system.That`s for traction control though,not normal shifts. If you have other information re; this,I would be glad to read about it.
The function we're talking about has NOTHING to do with traction control at all. If you haven't even heard of it and don't understand what it is, then how can you say "Chrysler is big on" doing it?
EVERY automagic-equipped car in the computer era momentarily reduces engine torque during shifts to some degree or another. More recent cars (2000 and later in general, ones with throttle-by wire in particular) actually do deliberate RPM matching while modulating the engine torque during shifts so that the clutches barely slip at all. Anyone with half an ear for engine sounds can *HEAR* it happening- the exhaust note changes subtly during the shift as the engine output drops- it sounds almost like someone very rapidly and skillfully shiffting a manual transmission. I've noticed it on GM, Ford, Chrysler, Hyundai, Honda, and Toyota rental cars I've had for the past 8-9 years. The only ones I DON'T notice it on are the CVT-equipped ones (Nissan, primarily). I've read descriptions of the logic in trade magazines. I've read about it in factory service manuals. The very first vehicles with a computer-controlled automatic (Chrysler A-604 from 1989) limited the engine torque on the wide-open-throttle 1st-to-2nd upshift by cutting fuel injection pulses, but subsequently it was discovered that limiting torque on all upshifts not only increased transmission longevity, reduced fuel consumption, and reduced heat dissipated in the transmission, but drastically reduced NVH by making the shifts glassy-smooth without the downside of slipping the clutches excessively.