md350

Wow, what a piece of ****...

Aggro_Al

Sounds like you may have damaged your tranny. I wouldn't tell the dealership about your brake torquing. Brake torquing done correctly is great for launching because you can pre-load the the tranny and it pre-stresses the whole drivetrain to absorb the shock of a hard launch. Brake torquing produces a lot of heat while the the TC is torque multiplying if you hold the brake torque long enough you might generate enough heat to burn the transmission fluid. Also, brake torquing works because you are using the power of your brakes and the torque multiplying effect of the TC to flash your engine straight to the stall limit. If you exceed the stall speed of the TC and still are holding it back with the brakes, eventually something on the drivetrain will be over stressed.

The reason you notice the change mostly when going from 3rd to 4th is because the 3rd gear is only a partial lock-up gear. It can still use torque multiplication from the TC while it's uncoupled or unlocked. 4th gear is a full lock up gear. It doesn't use fluid coupling. It uses a mechanical clutch similar to the MT.

That would be my guess of what is wrong with your tranny. Have it checked out ASAP to be sure.

Vader007

iTrader: (23)

Just one more closed minded ***** with an attitude!
You offer so much to the Z community with comments like this.
Its *****'S like this that should be banned!!!

jgregory124

iTrader: (13)

+10000000000

Zerk

iTrader: (2)

^^Is he really asking for an apology? What a homo.

iStan

iTrader: (29)

Take it in to the dealership. I drive mine stupid hard and no issues
BTW '06 Vortech SC

jgregory124

iTrader: (13)

Ok I took the car to the stealership today on the way the car did not act up at all and the trans specialist drove my car and said that there is nothing wrong with it, I know what I felt and its not normal.
Is there any way the car reset itself to the hard driving conditions the other night and has now reset? I only ask this because I have a passat and it has an intelligent trans that does this (not the slippage but the reset) It goes into sport mode? does the Zs do this under harsh driving?

Aggro_Al

The Z 5AT is driver adaptable and environmental adaptable. Overtime, it learns the driving habits of the driver and adapts that particular algorithm to other sensors that tell the tranny how the car is driving. ie you get slower throttle tip in when you are just cruising about town and faster throttle tip in when you are accelerating hard or another example would be the tranny shifting at lower RPMs when leisurely driving to optimize fuel economy versus shifting closer to peak torque when driving hard.

If you are shifting correctly and your tranny is working correctly you generally shouldn't feel things like double shifts unless the car actually shifted two gears sequentially quickly and your tranny shouldn't be making any unusual noises.

It could be possible that your tranny was just running extremely hot when you were experiencing the problems and now has cooled down to it's normal temps thus returning to normal operations. If you haven't experienced any other problems since I would just go with what the dealership said but keep checking for unusual behavior.

jgregory124

iTrader: (13)

Thanks man this thread has really helped

iceagetlc

iTrader: (10)

This is hardly here nor there, and I am in no way disrespecting your service in the U.S. Army, however if no one went over there, we wouldn't all be speaking another language if you know what I'm saying.

Your wording was just a little off.

ginobetterfly

iTrader: (30)

i have an 05 auto, and whenever i am in "manual" mode and driving it "hard", the shift from 2nd to 3rd is really rough and there is a big "thump" when it shifts between these two gears, BUT there is a "sweet spot" so to speak, that i can hit 50% of the time and no thump at all and a smooth shift. So i guess moral of my little story is that you just have to find the "sweet spots" and get used to your AT in manual mode. Then again,your case might be something completely different than mine.

As for manual vs. auto, when i am sitting in traffic on the 405 frwy, i cant even stand to use the "manual" mode of my auto, let alone a real manual with a clutch. soooooo glad i got the auto.

md350

I have this too. It happens when you give it too much gas when shifting. But yeah, its only 2>3 for some reason.

infamous350

yeh sure lol u know you wish u had the manual. For the guy that said there are auto's that are faster. Bring me a stock auto vs my stock manual and ill pull atleast 1 car on it easy. And forget about the highway downshifting in the manual mode on teh auto is gay ahha sry

ginobetterfly

iTrader: (30)

good story..

RedBird

I had a problem with mine shifting, and it was because it was low on transmission fluid.

jgregory124

iTrader: (13)

Look this guy disrespected a wounded service memeber. Just dont start. Talk refering to freedom of speech. If no one ever did our jobs we would be speaking a different language.

Aggro_Al

This is normal. Go ahead and let it thump. It most likely means that the TC multiplied right away and coupled or locked almost instantly. If you are driving aggressively I wouldn't worry about it as long as it isn't rough after it couples or locks. Drive it aggressive enough and it will kick you in every gear as the tranny couples or locks because it shifts so fast. Generally, you want to shift the 5AT with a constant or accelerating throttle. Unlike the 6MT, you do not want to lift your foot off the throttle while shifting. Lifting your foot off the throttle while shifting the 5AT will get you a slow and/or sloppy shift. It's much easier said than done. When I had my Z I had to consciously unlearn my habit of lifting off the throttle while shifting in manual-mode. In auto-mode don't try to help the tranny shift. You'll just mess everything up. Just use your throttle to control the velocity you need to be at and let the computer take care of the rest.

Jabdo233

Aggro_Al

Hey, If you're ever in CA I'll race you on the track. I'll just retune my ECU back to stock. I'm sure you can take me in my stock auto. It's even one of them slow soccer mom Volvos.

Let's see one of your timeslips so that I can know how much I'll lose by.

In the Z, both stock AT and MT are about equivalent. Driver skill pretty much determines who will win.

Accordaleer

iTrader: (5)

Haha i love that thump, everytime it happens my friend is always like yeaa nice shift lol, i also noticed when in manual mode if im driving casually it doesnt shift instantly, but if im driving it hard or gassing it, it will shift almost instantly, what you explained, explains that phenomenon