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I didn't find a code on the axle housing.
The casting number is 3917124N GM2DN Date looks like E 21 8. The axle has big brakes (Truck) and the factory coil spring upper control arm ears. Edge of flange to edge of flange is 49 1/2 inches. The tires on it now are N5015s with a full 12 inches of tread under the ZL1 Flairs. |
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