in accurate speedo reading

[monroc]

Hello everybody, I just had a replacement 4 speed auto gearbox fitted in my au falcon ute . now the speedo is around 1o k's fast also the acceleration does not seem as it was... The gearbox that was in my ute came from a series 3 au ghia (i bought a wreck which from memory was a tickford just wondering were there different ratios between models i am really unhappy about it but i am not sure what box was fitted thanks everone