Forum:
Is it possible to transplant LSD from Daihatsu Rocky year 1996 into Rocky year 1985? I got contradictious information googling about spline (29- and 30-teeth exist). Daihatsu F78 - year 1996 should have 1.21" axle shaft diameter with 30 spline. What about F70 1985?
Contact a friendly Daihatsu
Contact a friendly Daihatsu dealer, they will give you all the relevant information for a small fee usually. You will need your trucks VIN to allow them to identify which specification it was built to, then tell you what will interchange.
Failing this it is a case of stripping it to count the splines and measure the appropriate components.