When stomping on the pedal WOT while cruising, shouldnt the tranny downshift immediately? Mine seems to wait for a second or two then downshifts. My brother's car doesnt do this, makes a big difference when you stomp on it and it responds when you want it too.
Downshift question
- Thread starter 6SENSE
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Mine downshifts the minute the pedal goes down, but it takes about second for the turbo to spool, then it takes off and shoves your ass back into the seat like your its b!tch. (I love it when my GN is rough with me 
)
Are you sure its the trans hesitating to shift? And not just turbo-lag?
When I mash it, the rpms go up a little for a SPLIT sec, then it downshifts. Thats the way these cars normally shift; at least all that I've been in or driven.
)Are you sure its the trans hesitating to shift? And not just turbo-lag?
When I mash it, the rpms go up a little for a SPLIT sec, then it downshifts. Thats the way these cars normally shift; at least all that I've been in or driven.
Mine pretty much does the same thing. If I'm rolling along in 3rd like from your example, and I nail the gas, it brings the rpms up a little for about a half second, then quickly drops a gear and takes off. There really isnt much time in between flooring it and the downshift for me, but you will always have a small delay with throttle responce. It's an automatic. A lot of the trans and shifting parameters are in the ECM. I think that also causes a part of the delay.
I think what happens is, when you mash the gas, the TPS sensor sends a signal back to the ECM saying "Hey, the throttle is wide open!" and then the computer tells the trans "Downshift already, you idiot!"
Unless you have a tricked out trans, underdrive pulleys, and a hardcore race chip, it will never be exactly instantaneous. I believe its just how our trans functions. Any automatics I've ever driven at all seem to do that. Floor the gas, waits a sec, downshifts and goes. Not like a stick car where you just drop a gear and pop the clutch. Although I admit, sticks can be fun on open roads.
If you get into a street race or something from a roll, and are worried about that delay costing you, use strategy. Know for sure they're ready to run, and just make sure hammer the gas just before they do.
I think what happens is, when you mash the gas, the TPS sensor sends a signal back to the ECM saying "Hey, the throttle is wide open!" and then the computer tells the trans "Downshift already, you idiot!"
Unless you have a tricked out trans, underdrive pulleys, and a hardcore race chip, it will never be exactly instantaneous. I believe its just how our trans functions. Any automatics I've ever driven at all seem to do that. Floor the gas, waits a sec, downshifts and goes. Not like a stick car where you just drop a gear and pop the clutch. Although I admit, sticks can be fun on open roads.
If you get into a street race or something from a roll, and are worried about that delay costing you, use strategy. Know for sure they're ready to run, and just make sure hammer the gas just before they do.
WHAT YOU ARE EXPERIENCING IS VERY COMMON WITH AUTOMATIC TRANSMISSIONS. FIRST I WILL TELL YOU WHATS HAPPENING THEN WE WILL DISCUSS WHY. THE DELAY YOU FEEL IS CAUSED BY THE AMOUNT OF TIME IT TAKES THE CLUTCH PACK (OR CLUTCH PACKS) TO RELEASE DURING A KICK DOWN. A 4-2 KICK DOWN TAKES LONGER THAN A 3-2 KICKDOWN BECAUSE 2 PACKS MUST EXHAUST IN ORDER FOR THE DRIVEN MEMBER OF THE GEAR SET TO ROTATE AROUND THE HELD MEMBER. IE: 2ND GEAR. THE FIRST CAUSE OF THIS COULD BE THAT THE PLUNGER IS NOT FULLY OPENING THE DETENT CIRCUIT WHEN THE ACCELORATOR IS PRESSED OR THE HOLE IN THE PLUNGER WAS NOT DRILLED AT THE PROPER DEPTH FROM THE FACTORY.( OR WAS IT DONE ON PURPOSE TO DELAY A PARTS BREAKING KICK DOWN) THE SECOND CAUSE MAY BE THAT THE EXHAUST HOLES FOR THE CLUTCH PACK(S) IS OBSTRUCTED WITH DEBRIS (OVERFILLING THE TRANSMISSION AGGRIVATES THIS) AS THESE HOLES ARE IN THE BOTTOM OF THE VALVE BODY. I PERSONALLY LIKE A DELAY IN THE KICK DOWN AS LONG AS IT IS NOT TOO LONG BECAUSE IT SOFTENS TORTIONAL LOAD AND TWISTING OF INTERNAL PARTS. BY OPENING(DRILLING) AND CLOSING(ORFICING) THESE HOLES WE CAN CONTROL THE RATE OF CLUTCH EXHAUST AND KICK DOWN SPEED. CHECK OUT OUR SITE AT CK PERFORMANCE. THANX CHRIS
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