what is this...?

[135iDCT]

when i down shift to 2nd at 50mph the rpm at 5000,this is normal, but this week i notice the rpm at 50mph on 2nd about 5500 what could be the problem

also when i hit the throttle 1/4 or 1/2 then take off my feet, i feel vibration under the driver seat, what's the problem??

[Dackelone]

clutch slipping would be my best guess...

[135iDCT]

Originally Posted by Dackelone

clutch slipping would be my best guess...

what's the best solution, how much it will cost?

does this problem related to gearbox oil change, i didn't change it for long time

thanx...

[b1aze]

Rpm is independent of speed. The speed your car is moving at and what gear you are in will determine the rpm your engine will be running at.

Did you change to snow tires recently? Or change wheels at all? It wouldn't surprise me that a small difference in speed in 2nd gear would equate to 500rpm difference, say, 3-5mph may be 500rpm worth.

[135iDCT]

Originally Posted by b1aze

Rpm is independent of speed. The speed your car is moving at and what gear you are in will determine the rpm your engine will be running at.

Did you change to snow tires recently? Or change wheels at all? It wouldn't surprise me that a small difference in speed in 2nd gear would equate to 500rpm difference, say, 3-5mph may be 500rpm worth.

I know my car it's something in the gearbox, everything else is fine

[135iDCT]

Members need help...

[gdub]

Have you changed your seat settings recently?

If not your transmission is shot and you will probably need to buy a new one.

[135iDCT]

Originally Posted by gdub

Have you changed your seat settings recently?

If not your transmission is shot and you will probably need to buy a new one.

the big problem my car is FBO but still under warranty, i hate to takeoff all the parts and replace the stock parts to enter the dealer bool sheet

[b1aze]

Is it making any sound? Or are the RPMs just higher? Find a decent incline hill and do a few 2nd gear pulls up it. If your clutch is shot, your RPMs should shoot up.

[katsooba]

any other problems?
shifting up\down from\to second? kickdowns no hooking up?

[RimasRS]

What is this?

very good question

[Fed P]

Originally Posted by RimasRS

What is this?

very good question

Reminds me of the Borat scene, "What is this?" "Cheese" "and what is this?" "Cheese" "and how about this?" "Cheese" =)

[DBoyBimming]

I wouldn't be dropping into 2nd at 50mph as frequently as it seems you do. That's a huge strain on your trans. Do a pull In second and third and watch your rpms. If they populate faster than normal it's obv your clutch. A worn clutch usually slips under acceleration, not normal load. --- normally--- that's case by case.

[Wescuddles]

Originally Posted by DBoyBimming

I wouldn't be dropping into 2nd at 50mph as frequently as it seems you do. That's a huge strain on your trans. Do a pull In second and third and watch your rpms. If they populate faster than normal it's obv your clutch. A worn clutch usually slips under acceleration, not normal load. --- normally--- that's case by case.

If 2nd is 5000rpm how is this extra strain on his transmission? Please explain.

If its auto it is my understanding it would rev match on downshift, theoretically this wouldn't cause any extra strain on the transmission. And by your logic any gear at 5000rpm would be equally damaging.

Please explain.