Is the ZF 6HP21 transmission a good transmission?
Is the ZF 6HP21 transmission a good transmission? In fact ZF 6HP21 is a very good transmission, powerful, bullet proof pretty much if serviced in time and proper fluid pressure maintained! This transmission is still considered one of the best and has carbon clutches vs cheap paper ones you can find on Japanese cars. When to replace a ZF transmission adapter number 2? So if engine temps are good and transmission still runs hot 100-110, it means heat exchanger is clogged with transmission clutches, Torque Convertor wear and tear dirt. Replace it and check if it got better. This transmission...