I have a husqvarna R316Ts AWD with a tuff torq KTM10lb front transaxle that has started to make a gear or spline grinding slippage noise if you accelerate quickly from stationary position in forward or reverse.if you take off slowly it seems ok. I have just replaced a deck belt pulley that had a faulty bearing and had disengaged the forward and aft drive units so I could push the mower around in the shed. The noise seems to have appeared since I re engaged the drive units and took the mower on a test run. I have confirmed noise is coming from front drive unit, is there any way the manual disengage mechanism may cause this issue. The arm on the disengage rod is moving all the way back to engage position, and I have jacked up the front to confirm the wheels are being driven, noting no noise is present accelerating when wheels are free to turn with no load, on jacks. Maybe just coincidence, any help on this one would be great before I have to pull the drive unit apart……thanks.