Well here I'm here again, needing knowledge I am having problems getting a suitable ratio diff for a 2WD hilux. I have converted it from auto to manual but the ratio is far too low and the speedo is out by about 10kph ie; at 80kph the speedo is reading 90kph and the engine revs reflect this as the poor girl is revving its heart out. It had a 3.5 to 1 g series diff so it was suggested to go to 4.9 but that has only made it worse as I can wind the speedo off the dial at around 100kph real road speed.
so therefor I must need something around 3.1 , does this sound right or am I barking up the wrong tree?