4 ms·

I thought this was pretty technically advanced in 1980. http://www.technicopedia.com/8860.html http://www.technicopedia.com/8860.html

• implements 5y ago
  I had the previous one: http://www.technicopedia.com/853.html http://www.technicopedia.com/853.html - which didn't have a rear differential. My father (an engineer) made one from regular bits which was spun by a large pulley with (trigger warning!) the centre drilled out so an axle could freely pass through it.
  • blunte 5y ago
    I had this one as well, I think around age 7. It was my first "expert" set. Legos were my life until computers! It was also great when the electric motors and battery box came out. With a bit of gear work, you could actually take that 853 and motorize it... working engine and all.
    • implements 5y ago
      Yes, if memory serves I you mounted the motor on the front bumper in a way that looked a little bit like a supercharger. It made the rear axle shudder around corners - hence the MacGyver’ed differential!