The Yukon 8620 steel full spool for Dana 60 with 30-spline axles converts a differential to full lockup, sending power to both wheels at all times. Heat-treated and machined to replace the carrier assembly, this spool is intended for heavy-duty off-road or drag applications and is specified for Dana 60 housings with 4.10 and down gear ratios; not recommended for street use.
Yukon Gear Steel Spool For Dana 60 w/ 30 Spline Axles / 4.10 & Down