Hello there,
Looking to see what this problem could be. Not sure if it is the center diff or I stretched first gear.

The car is a 95 Impreza L with an EJ205 swap and a 95 JDM WRX transmission. Took the car to the drags on Friday night. 2nd run I broke a few teeth off the spider gear in the rear differential. Replaced the differential with a known good one (also a 4.11).

Been driving the car and having this whining noise now on deceleration. Also when accelerating in first gear sometimes I hear what almost sounds like a rock tumbler for a second or so at low RPM's. Goes away at higher RPMs.

The noises are not apparent in any gear other then first.