Chassis and body by JGR, engines by TRD (same as Gibbs) pit crew and tech team provided by JGR.....but yes.....very independent.
Sorry I saw this coming after Toyota did little in the first part of the season. Then made noise like they would leave NASCAR Cup.....got a Toyota only aero change at Talledega.....started winning. Mark my word....2019 we get a new make in Cup (MB)) and Toyota does like Dodge did years ago.....then leave.
After working in NASCAR for over 20 years it is ENTERTAINMENT not a sport.....know that and enjoy what it is. Just sayin....