Can anyone help diagnose this problem?

[robz]

Been running the car pretty hard. Definitely screwed something up. Upon light throttle esp. in third and fourth at low rpms I can hear a constant knocking that can also be felt in the shifter. If I press the gas slightly more the noise increases speed with the increased throttle. If I let off the gas the noise goes away and if I stomp it it seems to go away but maybe because the exhaust noise takes over. There is definitely something wrong and I will bring it in, just wondering if anyone has an idea? Thanks

[NYCHASM]

Are there any DTC's set?

Charlie

[robz]

Charlie, not sure what you mean.

[JDBgn]

Problem codes=DTC's
Get it to a dealer asap before you tear up something else or get stranded.
IMHO

[robz]

No codes were thrown. I was told that this type of problem would likely not throw a code

[Birddog-Singer]

could be a loose something like the exhaust. Did ya look under the car or around the hood to see where its coming from?? Remember, if you ignore it too long it might go away (not necessarily a good thing)

[robz]

nothings loose. Must be in the tranny.

[smook]

Robz,

When you say you were driving hard...

What do you mean by that? Over bad roads, driving fast...??

Bill.

btw You're car is new... 03!! Should be humming'''

What's the mileage?

[robz]

7000miles. Hard drag racing. 10.9x's,11.0x's

[NETfiend]

Sounds like you definately broke something. You probably broke some teeth off in the diff or broke something in the tranny. It wouldn't be suprising if your running those kinds of numbers on the drag strip. Your best chance of finding exactily where the noise is coming from is to put the thing on a lift and use a stethescope on the various driveline parts while the wheels are spining in the air.

[robz]

Thanks. A stethoscope is something I have.