Restore accurate speedometer readings with this 31 Tooth Short Shaft Speedometer Gear with O-Ring from PORC Off Road Products. Designed for Jeep Wrangler YJ, Wrangler TJ, and Cherokee XJ models equipped with NP231 transfer cases, this assembly helps correct speedometer calibration after tire size or axle gear ratio changes. This bundle includes both the speedometer gear and matching O-ring for a more complete installation, helping eliminate the need to reuse worn factory seals during service. Built as a direct replacement with factory-style fitment for dependable installation into the transfer case speedometer housing. Compatible with 93-95 Jeep Wrangler YJ, 97-06 Jeep Wrangler TJ, and 91-01 Jeep Cherokee XJ applications using NP231 transfer cases. Replaces OE and interchange part numbers 52067631, 18760.11, 6035709, and 18760.37.