My Lancer 1992 second gear shifting is very hard when car is cold. This problem vanishes as the car warms up and engine temperature needle reaches to its nominal temperature. Car manual describes to use "Hypoid Gear Oil SAE 75W-90 or 75W-85W conforming to API Classification GL-4". Please advise
1....which brand gear oil with these specifications should i use and after how long it should be rechanged/drained?
2....Will it solve second gear problem i mentioned above?