I love these cute mini test cars from ideas book 8889 : r/legotechnic
This prototype truck chassis (Idea book 8889) from more than 30 years ago already had a lift axle like the one on the new Tow Truck, that's quite impressive! : r/legotechnic
LEGO Set 8889-1-c4 Repair truck (1984 Technic) | Rebrickable - Build with LEGO
LEGO Set 8889-1-c3 Car With Gull-wing Doors (1984 Technic) | Rebrickable - Build with LEGO
8890 TECHNIC Idea Book - Brickipedia, the LEGO Wiki
8889 Idea Book - LEGO instructions and catalogs library