Browse Detroit RT40-NFDFR308 Front Differentials for sale on MyLittleSalesman.com. Compare prices, photos, and seller details across 6 listings. Detroit RT40-NFDFR308 Front Differential pricing ranges from $3,295 to $3,995 based on recent marketplace data. Filter by condition, price, or year to find the right Detroit RT40-NFDFR308 Front Differential.