What Jeremy said regarding the trans, if it is an 8HP. ZF has a very specific procedure. If memory serves, it holds 8 qts. You'll get about half of that out with a standard trans service. The transmission service kits they sell usually come with 7 quarts. You need to be able to monitor the trans temp to properly fill the trans. You'll need an app or a scan tool to monitor the temp, though some guys just use one of those laser temperature guns. Some say you need to reset transmission adaptations when done, in which case you'll need a scan tool like the Schwaben scan tool made by Foxwell. ECS tuning sells these. That said, nowhere in the instructions from ZF does it say that adaptations need to be reset, so I wouldn't worry about that part.
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