Welcome to the post and congra on your "new" car!! I would recommend you to check with the manufacturer recommended trans fluid first. As far as first gear start, I don't think I can help you. Try to do a search on the forum to see if you can find anything. I believe to make the car to first gear start requires quite a bit of work. Good luck.

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95 R129
04 Infiniti G35.5 BS
10 X204