Automotic Transmission Life

ZeeYouLater

If you always drive in M there is more wear on the 2 magnetic torque converter sport clutches "less slip mode" .
Changinging the Oil is never bad, depending on drive style. The Gearbox is designed also for the 5 Liter Infiniti V8 with higher torque, so maybe this is the reason for the infinite transmission oil change interveal. I dont belive in that. You can always see the wear of the 7 planetary gears and the break bands in the automatic oil pan. So you can see what driver was on the car if you have there a lot of metall wear in the pan. The service manual says exchange the gearbox if you can find some one millimeter metalic peaces in the oil cooler of the gearbox. :-) This is the right idom " Where wood is chopped, splinters must fall"
On older automatic gear boxes you can adjust the gear break bands. You cant find anything in the service manual..so its a exchange gearbox if it is not self adjusting.
Also there are rumours that the turbo mods do not hold the torque with the smaler 6th and 7th gear diametor planetary gear brake bands.
Thats only my opinion

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7AT. NAVI. 19". (Sport and Touring Package)