33 second video of my buddy putting the car in and out of drive/reverse.
https://www.youtube.com/watch?v=HD_TvcBKZmI
Okay so I've had this issue for a while now and It's been getting progressively worse in terms of how loud and how much it can be felt in the car.
Going into reverse is significantly louder. (Distinction can be heard in the video.)
I also started hearing an occasional metal on metal sound that I would describe as a "slap". It only seems to occur in second and third gear after acceleration followed by letting off the pedal completely.
Despite the noise, the transmission seems to be unaffected. Still shifts on time every time, no shudder, and very firm.
Just did the U-Joints to rule out that possibility and it made no difference. Spider gears also done recently but the noise began long before that.
I have a J-mod with the 1-2 springs removed and the most aggressive form of the Z-tune.
I have a number of ideas on what it could be but what do you guys think is the most probable cause?