Bmw 6 Speed Transmission Gearbox Sump Pan Filter Kit + Oil Genuine ZF Auto 6HP19 6HP21 Here you are purchasing a complete kit to service your transmission sump on your ZF 6 Speed Gearbox. The automatic gearbox sumps are manufactured from plastic which can warp over time. This causes the fluid to leak hence renewal of the transmission filter is recommended even though the main dealers class the transmission sumps as a lifetime part. Jerky gear changes and miss shifts are usually a sign that a transmission service could be due. We also recommend a transmission service before tuning your car so you can get the most out of it! 6 SPEED GEARBOX - 6HP19 6HP21 ONLY Technical Details; ZF Parts kit, automatic transmission oil change Alternative Repair Kit : 1071.298.038 Content .