i have a 1996 nissan maxima and the check engine light is on the code is PO734 . on 1996 Nissan Maxima

I used a code reader and the code was PO734 which was,gear 4 ratio incorrect.What does it mean and what do i need to do to fix it?And how much will it cost?

Asked by for the 1996 Nissan Maxima
trans is slipping internally. it indicates you will be needing an overhaul shortly.