St183 Gtr With Mr2 Gearbox Speedometer Problems

[scotty4-20]

Hi , everybody , i'm a noob here .. - i recently bought 90 st183 GTR Activesport (JDM IMPORT) with 3s-ge . The speedo is not working . it has a 0-180 kms clock on it . i was also told that a mr2 gearbox had bein fitted . i had someone look and he said something about a speedometer drive? and asked if i had the old gear box .to take the old one out from it which i do not have . will it fit? or what else will fit or work ? help needed thanx in advance