That code is the actual gearbox code.. This is the info you require when sourcing a new box from suppliers.
Ideally you want to match the exact code. But if not possible, you must try and find a gearbox with identical gear ratios, otherwise you will have to replace the rear differentials too..
Try this for more info>>>
The SPDA - Transmission Chart
Or even Call david at
Welcome to the API website for more info