Bavauto is a great source.

Never liked Lexol- always seemed greasy. Have had good luck with Griots products.. Spendy but work well.

At 77k, some of the maintenance items are a ways away. Trans is early but changing now won't hurt you any.

I can't specifically speak to the 4.8, but the 4.4 would begin to show some leaks about now. Take a hard look at valve cover gaskets and such.

Are you the same bustedknuckles that used to be on TDS 6.0 forum?

Good luck with the new machine!

__________________
Dave

'05 325xi
'10 E70 35d
'85 911 Carrera
'66 911 Work in progress
'91 Chevy C1500
'95 Jeep Cherokee
‘18 Jeep JLU