Originally Posted by APIDavid

You have been sent a TY 754 which is a 99 onwards gearbox and would have been [ see below ] a good upgrade.

BUT I expect that you have been sent a UK box with the wrong final drive ratio and the clunk was the centre diff breaking. Because it doesn't fit your car.

Now you have a problem 'cos the breaker [ or whoever ] sold you the box is unlikely to take it back broken - you'll need to make a lot of noise to do so.

OR you send it to someone like us and we'll create a box that does fit and is compatible with your car.

The simple test to see if I am right, is to take off the rear gearbox case exposing the drop gears that transfer drive proportionately front and rear.

Count the teeth on the gears:

30 : 30 is JDM type I.E. a VB box which is what you need.

30 : 33 is UK VN type box

Good Luck - call if I can help

David APi