You have a Chevrolet rear per your axle code YD194...revisit your axle and confirm the "9" in the code...I believe it's either a 0, 1 or 2.
YD = 1955 1st Series made at the Detroit Axle Plant... 5-6000 Series, RPO 210 2-speed (8.86/6.70 ratio)
1 = January (month)
x4 = day
Mike B
