BC7 SUBARU Legacy LSi

Malfunction on the rear transfer clutch in BC7 SUBARU Legacy LSi US model has recovered completely, no strange tight corner braking effect is observed since a month ago just after availing all the replacement parts for the maintenance, how come? 6 years interval used lead battery 75D23L has ended it's life because of lack of capacity, head light becomes darker when starter motor is activated, and the voltage comes to higher in relatively charging period of time. In addition, special shaped clip to keep frontal grill in position must be ordered, 6 pieces in total. Wheel alignment and constructive axle geometry must be checked again, I feel some left side tendency while straight running. Set-back, swung rear end, uneven wheel bases, frontal camber error or it's value on rear axle leading to causing thrust angle?