Jaguar 6HP26 Gen1

## Description First generation ZF 6HP26 6-speed transmission in Jaguar models X350 XJ/XJR, 2002.5 to 2009MY, 4.2L, 3.5L, 3.0L & 2.7L engines X202 S-Type, 2002.5 to 2007MY, 4.2L, 3.0L, 2.7L & 2.5L engines X103 XK8/XKR, 2003 to 2006MY, 4.2L engines Transmission tuning is not just for performance; the overall driving experience is improved. – faster, smoother shifts – the transmission picks the gear you want – complete torque converter lockup improves highway economy – raised torque limiters so you can get all the power to the wheels. Honestly, these first-generation 6HP26 have a pretty woeful factory calibration; slow lazy shifts, a dull kickdown strategy, some bizarre torque limiters, and worst of all, a lot of programmed slip (as in programmed wear). There were some major changes to the software for the 2006MY in the XJ and S-Type, which solved some of these issues, but the earlier cars, XJ/XJR, S-Type and the XK8/XKR, were left with no updates. Have you ever wondered why a 2005 XJR is so much slower than a 2006 XJR? It’s not just the updated engine management, a LOT of it has to do with the transmission calibration. If you are getting one of these 6HP26 rebuilt, then a transmission tune is a must. we can also properly reset adaptations so the rebuilt box shifts smoothly immediately. NOTE: As of April 2022, we are only able to flash/tune these transmissions with the TCM on the bench (module removed from transmission case). Currently not possible via OBD. Transmission tunes can be applied in several ways; – bring your vehicle to one of our locations to be flashed with our equipment – list of locations [HERE](/contact/) – purchase your own PCMflash dongle & license, and use your own J2534 interface – information regarding PCMflash [HERE](/product/pcmflash-scanmatik/) – ship us your TCM and we will flash it on the bench – contact us for shipping information [HERE](/contact/)