Transmissions and clutches have a lot of parts. All these parts need to be clean and in good condition to work together properly. The step-by-step process of rebuilding a transmission must be done in an exact order so all the parts are placed or aligned correctly.
Lane who is S & A Transmissions master builder has been rebuilding transmissions for over 30 years. His experience is awesome on all facets of drive lines in all make and models of vehicle. If he can't do it no one can.
Many of the parts have to be stream cleaned.
Other parts are hand cleaned. All are inspected for nicks or damage.
Parts are sorted laid out so they are all accounted for.
The cases are inspected after cleaning.
All moving parts are tested by hand before the transmission is installed back into the vehicle.
And you end up with a finished rebuilt transmission.