Gearbox has been assembled, my friend assembled it. I think its fine now with working lsd unit. Water has been falling directly in the gearbox via broken speedocable rotor o-ring & engine bay washing. Next week we will install box in its place and i have to buy some parts for the car and try to assemble as much i can because i have holiday.
I bought 3 quarts of REDLINE MT-90 gearbox oil. Info & pic borrowed from Redline.
* 75W90 GL-4 gear oil (similar to SAE 5W40/10W40 engine oil viscosity)
* Popular in Nissan, Mazda, Mitsubishi, VW/Audi, Lotus Elise/Exige, Toyota
* Offers quicker shifts, perfect synchronizer coefficient of friction
* Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
* High performance gear protection and longer synchro life
* Eliminates notchy shifting, even when cold
* Satisifies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 40, 10W40, and 15W40
* Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified
Brake calibers assembled too.