Shop 1990 Buick Century Differential. 4WD, 3.73 ratio, code: AACH, AAAR. Differential - Repair or Ratio, AAAR, AACH, Code - OEM Buick Part # 20980291

Device connecting Drive Shaft to Axle Shafts that allows for varied speeds of wheel rotation. Drive Ratio 3.73. Axle. Cable. Carrier housing. Center Differential.

Differential

Fits Sierra 1500, Silverado

4WD, 3.73 ratio, code: AACH, AAAR.
Differential - Repair or Replace
If you’re hearing gear whine, clunking, or bearing noise from your rear differential, it may be necessary to remove it and have it rebuilt. Have our technicians examine your to determine the best course of action.