64drvr

JerryU

Don't need no stinking hydraulics! Just use some sensors like the do for Rev Match and shift to whatever gear you'll like! See some DCT are using that approach as an option.

More I read abut the "logic" they must use to see if the next gear the trans is in before switching clutches should be higher or lower, the more I am sure at times I can do a better job! Such as on the Interstate switching directly from 7th to direct drive 4th. Or when traveling at 60 mph on our rural roads and making a turn going directly from 5th to 3rd. Could use the old Ferrari gate for fun but all that is occurring is the stick defines the next gear not some logic algorithm built into the computer! They admit that if accelerating, say in 3rd they assume 4th is the next gear and have the DCT set for that. If it sees deceleration or a brake signal it changes to the next lower gear. I often don't use the brake on a 5th to 3rd moderate speed turn in town! I'll be happy to have the computer do the shifting where I tell it! Sure have a switch so when I want I can let it be automatic!

Could do something with a clutch peddle as well even it's not much more that a sensor or switch. They admit at idle before taking off they slip the clutch slightly so it's ready to engage as the accelerator is pressed. I can, via a switch or sensor, have it do that when I want. Sure the computer can control the rate etc I just tell it when to start! I can use the brake as I do now if on a slight incline!

Just Sayn'!

Apocolipse

So....its an automatic then with a random stick that moves around instead of paddles...i see...

JerryU

Apocolipse

Don't want to come off rude but have you driven a DCT vehicle in auto mode? It will skip gears for you.

As for my earlier comment about sending a hydraulic line back - it was so people could retain the clutch pedal feel vs electric on/off switch.

JerryU

Have not but how do you go from 7th to 4th? Pull the downshift lever 3 times? (The Tremic transaxle that is said to be going in the C8 is a 7 speed. Am assuming 4th is direct drive and 5th, 6th and 7th as in the C7 are all overdrives.)

The issue that all have is it pre-places the "next gear" based on what it "assumes" you are doing. For example is accelerating in 3th it assumes the next gear desired is 4th. But if coming into a turn it will charge the gear to 2nd if it sees aggressive braking.

Have seen a stick and gate in an DCT Audi but have not driven one. Not rude, and assume the algorithms for different DCT are not all the same.

I don't think you can control the concentric clutches hydraulically anyway. Not sure if the Tremic will be two dry clutches or like some DCT wet clutch arrangements as used in an auto gear change. Rate of application in any case is probably best left to the computer control system. I was just indicating perhaps a switch, more likely none mechanical Hall sensors as used for Rev Match would be easy to implement. The Vette engineers have probably considered possible options and with 75% of the folks buying automatics who would want this feather. Perhaps extra cost options.

As my old boss would say, "I'm solving a problem not know to exist using a method known not to work!