Can anyone tell me where to start? I have a 2003 z06 and mgw short shifter , once I step on clutch and move from neutral to first I hear a rattle or slingshot type noise coming from like under shifter or cur and it goes away , sounds line something is loose under the car , what should I check? Also does it in downshift from 2nd to 1st

 

Video???

 

Is this something that just started or is the car new to you? But as Helga203 stated a video or recording of the sound will be a big help.

 

Get the car up off the ground and look through everything; brakes, exhaust, suspension, mounts, links, etc. If you don't find anything and it can be one thing or multiple little things that seem very insignificant, that light ringing / buzzing rattle is usually your linkage (the one that connects the shaft in the shifter box to the gearbox) or your torque tube couplers (usually couplers make more noise / vibration). Both of these last two options require dropping the tube /gearbox. How many miles are on the car / tube / clutch?

 

car has 29k miles

 

Here is a video coming from right under the shifter
you can hear like rattle when going from neutral to first or downshifting from 2nd to first

 

Sorry to tell you but that's not good. That has something to do with the clutch or TT.

 

what is Tt?

 

i think your right , I just saw a video on YouTube and it’s very similar to my sound

 

Pilot bearing

 

Pilot bearing.?... Been there. 😏

 

is it a major repair?

 

Yes, your not familiar with how it comes apart, probly 10hrs min and probly longer. You have to have tools and a place to work on.
Google theres step by step instructions.

 

The problem is that the car also has over 20 years on it. Years are just as important for thee cars, particularly in regard to bushings, seals, couplers, etc.; anything made out of rubber. Everything is made out of rubber and it all degrades over time. I have rebuilt shifter boxes from cars with 5K on them, it doesn't matter, they may look OK but the difference is significant. People always like to tell me how cherry their car is, how it lives in an air conditioned garage, only gets driven once a month, whatever, it doesn't matter; soft parts don't last even if the car has low miles on it.

My guess is torque tube couplers based on that sound. Unfortunately if your couplers are shot you probably might as well do the clutch, etc while your in there. If you do you can send me your linkage if you want me to get the slop out of it, the shifter box as well.

I wish it was better news but it will feel much better once you solve it and the linkage / box.

The Cliff Notes version of the repair for anything from the clutch to torque tube, couplers, shifter, shifter box, gearbox or differential. These cars have a goofy transmission setup, it's a big reason they are what they are. Instead of having the gearbox connected to the motor that goes back the length of the driveshaft positioning the gearbox in the middle of the car, you have the motor and clutch that connects to the driveshaft then the gearbox and diff are located all the way in the car. These part are all connected and usually removed from the car for service together as an assembly. Gearbox, torque tube and dif. This means that in order to service clutch, tube, couplers, pilot bearing, etc the whole assembly needs to come out. The driveshaft in these cars lives inside of the tube and the couplers are part of the driveshaft. They are rubber and they fall apart, the pieces are trapped inside the tube and you get a lot of vibration and rattling form the pieces running around in there.

The shifters in these cars consists of two main parts; the shifter which is the upper part that has the stick / **** and a box below that has a shaft inside it. That shaft connects the shifter to a linkage that connects to the gearbox. All these connection / pivot points from the shifter to the box to the linkage to the gearbox all have a little bit of sloppiness and they all get worse with age and miles. This is why addressing the box and that linkage will help out the feel of the shifter significantly. This doesn't really matter in your case but they typically wear / get sloppy to a point that you'll have problems getting into gears and eventually not be able to get into some gears.

 

Moved to C5 Tech for continued discussion.