OE rings - part number O-SPR-AL4-E1: for a transmission with NDTH hydraulic distributor OR part number O-SPR-DPO-E1-NDTH for a transmission with a non-NDTH hydraulic distributor causes the destruction of the automatic gearbox. For more info please ask for our flyer IDS-AL4(DPO)-E1-Rings - PLEASE COMPARE THE E1 SEALS WHICH ARE IN THE TRANSMISSION PROPERLY WITH THOSE YOU WISH TO INSTALL - these rings are not part of our overhaul kit, please order separately.