shotiable

dear s2k owners,
can anyone help me figure out whats wrong with my MY06 S? theres a distinct "lunk" sound right before i enter first gear... it doesnt happen with any other gears, just first, and its one of those moody defects that only happens sometimes but not all the time. the dealership cant quite catch it so they wont warranty it for me... and the dealership that i bought it from caught it but they said it was really like that... now i have my doubts because i just test drove an brand new S off the lot the other day and it didnt have the same lunk on 1st gear... so yea if anyone has the same problems or knows what this could possibly be... please post.... coz i'm stomped... i really cant figure it out...
TIA
shots

xviper

There is nothing wrong with your car. Next time you go into 1st after sitting in neutral idling with clutch up, don't ram it into 1st immediately after putting the clutch to the floor. Wait 2 to 3 seconds and see what happens. OR, instead of putting it into 1st, put it into 4th, then immediately into 1st and see what happens.
I'll bet it won't clunk anymore. When you idling in neutral, you are spinning the transmission around at about 1000 rpm, more if it's right after a cold start (as high as 2000 rpm). When you immediately put it into 1st, you are causing that spinning tranny to sudden come to a stop. That is transmitting all that energy through the rest of the tranny, back through the driveshafts, through the rear diff and out to the CVs in the 1/2 shafts. All the backlash get taken up suddenly and creates that thunk. Waiting a few seconds allows the fluid friction to slow and stop the tranny. Selecting 4th will also stop the tranny, but because 4th gear's ratio is lower (numerically) it can absorb the backlash without making a big fuss.
Stop obsessing and just drive the car.

RedChili

I hear it with mine too. Normal sound and nothing to worry about.

s2kv

Phew mine does that too! Thanks for the info X

shotiable

i'd be relieved to hear that but it happens during normal driving when i'm fully stopped... so that means i'm idling at 700 rpm and it still lunks. nonetheless i appreciate the reply, i'll try the 4th gear to 1st gear thing... maybe it'll work.
ty all

RgistRdShowoffIX

i told you. I'm with Xviper on this one.

xviper

Did you not understand anything that I posted? Do you not think that suddenly stopping something that is spinning at even 700 revolutions PER MINUTE is significant?
Try this: Take a bicylce, any bicycle and stand it upside down so its tires are up in the air. Now, spin that thing at about 700 rpm (even 500 rpm if you like). That's about 10 complete revolutions A SECOND. Now, take a hand, either hand, and quickly grab that spinning tire and stop it as suddenly as you can. Feel any energy? That is just a small fraction of the sort of energy you are dealing with when you slam a car transmission to a sudden stop. It is that energy that gets released to close up all the backlash in the drivetrain between the tranny and the rear wheels.
I'm sorry, but I can't explain it any better than this. If you wish to continue to think there is something wrong with your car, you are at liberty to continue taking it back to the dealer for a "fix".

shotiable

eh fair enough...