Shifter coupler nuts tight?  (Quick visual check should be OK)

Speedo cable connected?

Trans -to-engine bolts/nuts tight?

bullet19mm nut and bolt at the bottom front
bullet15mm bolt at bottom rear
bullet15mm bolt below the starter
bullet19mm nuts at the top front and center
bulletStarter nuts

Tripode joint boot clamped tight?

bulletYou did put grease in it, right?

Subframe pivot bolts tight?

Sway bar bracket and link connections tight?

Ball joint pinch bolt tight?

Trans mount bolt tight?

Reverse light switch connected?

Turbo delivery pipe connections

bulletAt throttle body
bulletAt intercooler (from beneath the car) - check carefully
bulletAt turbo bypass valve
bulletTemperature probe electrical connection

AMM connected electrically?

No air leaks; alignment OK; clamps secured

bulletYou did reinstall the air cleaner element, didn't you?

All cables reconnected to terminal block on battery holder?

Check top of the engine for loose components

bulletPCV stuff and vacuum grommets and hoses

Um, that transmission does have oil in it, doesn't it?