Is the main casting black or aluminium?
If black you have an LT77, please go to point (a) to identify which type. If aluminium, you have a LT85, Santana box. Please go to point (b) to identify which type. (a) The gearbox number should be printed on the identification plate (smooth flat metal) just below the filler level plug, on the right hand side of the gearbox. The relevant numbers we require are the first two and the last letter, i.e. 54A1234567D. But in some cases this may be very dirty and greasy. If you are not able to identify this number we will need precise details about the type of vehicle you have. (b) The sides of the aluminium housing will either be smooth, which will be a 20C, Solid Case, or cross hatched, which will be a 22C, Split Case Auto box There are two types of auto boxes, 3 speed and 4 speed. If you are unsure what type you have this can be easily identified by sitting in the cab and looking at the shifter. The following diagram of the shifter will identify your model. 3 Speed 4 Speed P P R R N N D D