Axle Play at Transmission...Seeking Opinions

[tmontague]

If it is worse when load is transferred to the rear and you have a worn/crumbling bushing then that is the likely culprit.

Those bushings are the only thing holding all of the rear of the suspension to the car (with the exception of the rear shocks which are not supportive). If a bushing is worn this can cause vibration/noise to resonate into the cabin such as the simple noise and vibration that comes from a tire/wheel turning on the road.

I'd inspect that bushing further.

My car makes all sorts of noises and pops ever since it started to become a track car. I always inspect underneath it and make sure everything is sound. As long as it all checks out then I let it go. Seems to work well this way.