Re: T5 wont engage into any gear
Check the pilot bearing or bushing while you're in there, whichever you used, make sure it didn't get damaged when you replaced it or anything.
Numquam ponenda est pluralitas sine necessitate.
— William of Ockham, c. 1330 AD, from Quaestiones et decisiones in quattuor libros Sententiarum Petri Lombardi
Roughly paraphrased into modern English, and applied to figuring out what's wrong with your car:
The simplest explanation that fits all the facts is probably the right one.