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IIRC the only factory front LS was in a D44. Look at the door sticker under
AXLE. If you see three numbers (the last number must be a 2), your truck
came with a LS front axle. The first two numbers are the rear axle identifier.
In the example below the gear ratios is 4:10, the front axle is LS.
If the rear axle code begins with a letter then it came with LS
Thanks guys. My tag says C5 which is 4.10 LS for the rear, which I already new. I was just curious about the front, now I know. I wonder why Ford didnt use a LS in the Dana 50, only the 44?