"Is it possible ot replace Land Rover TD5 gearbox with another model landrover gearbox?"
5t7j gear box
change starter on landrover freelander
scenic II gearbox oil
No
tdi200 gearbox[ie LT77] is better than tdi300
The synchro cones in the gearbox are worn. Either a strip and replace or a whole gearbox swap is the cure.
If it is the gearbox, then you have to dismantle it and replace faulty parts, such as a gear fork. This could also be a clutch problem.
The mountings on the top will differ. It should fit the engine ok, but you will need to fabricate a new cradle to match the car's gearbox mounting position.
You have to remove the engine and gearbox. you will need a engine crane. Once you have the engine and box out, remove gearbox from engine and replace clutch, Refit gearbox to engine, put engine and gearbox back in car. Easy job if you have access to a engine crane.
Take the gearbox out and flip it round twice
the speed sensor is located ar the rear of the gearbox pointing upward. there are 3 wire coming out which plug into the loom on top of the gearbox. after unplugging the wire the sensor unscrews from the gearbox.
You need to replace an oil seal on the gearbox.