I notice a slightly rattling noise which is addressed to the Getrag221 box. It appears only when turning off the ignition at good working temperature- never when cold. Google Lens (!) (AI) recommends to change gear oil to Red Line MTL 75W80 instead of Mobil ATF LT 71141 automatic transmission fluid which I am currently using. Opinions?? However, the Getrag box gear change is silky smooth so no problem as such.
Thank you for your replies
