The PN: G/22-2041-529 is incorrect, it is for the 8” 4 cylinder gear with a 27 spline pinion shaft.
Here is what I can tell you about the 2003 Tacoma with factory electric locker. It uses an 8” V6 diff if it has the electric locker. In late 2003 they started to use a 29 spline pinion shaft and pinion yoke. It still could possibly have a 27 spline pinion and pinion yoke. Yukon and Trail Gear both have 29 spline multi-drilled pinion yoke. Kits part number YKGYYT35040-29-KIT or TGI304110-1-KIT. PN: G/22-2058-529 is correct but out of stock. The master install kit for the factory electric locker 8” V6 rear diff is PN: G/235-2058L. Give us a call we have other brands available Sales Associate: 808-676-2266 or Toll Free: 800-421-1050