Searching for a speedo correction for my 04 Sequoia and came across the Yellow Box speedo recalibrator on Tundra.com. The earlier models tundra used a plug and play harness. The 05 and up A750 used a spliced harness into the the ABS ecu. This mod is popular in the 80 series forums. I just cant find anything for the 120 series. Since our 120 share the same A750 transmission I'm assuming this is doable with a little help.