373 gear ratio ring and pinion for both front and rear diff. The gears are for a 12 bolt light duty 3/4 ton years 1988-1998. Gears are in excellent shape and are out of a 1997 Silverado. Only approx. 2000 miles on gears. I am only asking $250.00 for the set. From what I have priced they are worth between $400 and $500 dollars. Please feel free to email me at crichmond@bendbroadband.com or call me at 541-771-2886! Thanks