I've got a '95 F355 that is on its 3rd alternator......and yes, I had the grounding strap put on with the second one. Well, the battery light has come on again, two years after the last alternator was put in. I have the core of the last bad unit and am thinking of getting it rebuilt. My questions are: Can any auto electric place rebuild it? It's a Nippondenso 140 amp unit. Also, can I replace the alternator myself? I am guessing that some of the undertray panels need to be removed (as in an oil change, which I do myself). Can I then get to the alternator, and get to the lock nut and tensioner adjuster on the tension adjustment pulley? Do I need to have a belt tension gauge or is the belt tension that critical?