Check the listing for details. Traxxas 4981X Spool T-Maxx. Condition: New. Listed at 12.00 USD. New in package Traxxas 4981X Spool T-MaxxSpool eliminates differential; use off-road only. (Requires #4981 ring gear) Differential Spool: This differential spool replaces the rear differential gear. The spool locks the axle, providing equal power to both wheels no matter what the truck drives over. If you’re building a Maxx truck for straight-line sand drags, hill climbing, or pulling, you can replace the rear differential with a spool for increased 2WD traction. Includes: (1) Differential Spool We will combine shipping, just 50 cents more for each item.Vehicle models vary. We DO NOT guarantee this will fit the vehicle specified in this listing!Verify that this item is appropriate for your vehicle. Consult your manual or vehicle manufacturer.Verify vehicle fit-ment before purchase.Returns will only be accepted on items that are returned in new, factory-sealed packaging. Used, damaged (unless damaged when it arrived to you), and opened items will not receive a full refund. Any and all warranty claims will be handled through the manufacturer directly.