- (slang, automotive) An automatic transmission (in reference to the fluid-coupling of the torque converter).
- The slushbox did nothing to improve an already sluggish response.
- Slushboxes are taking over the scrub. Once scorned in the bush, the automatic gearbox today is more widely accepted in traditional four-wheel drive wagons. "Bush bashers go auto." The Sunday Telegraph. 2002 July 21. Pg. A05.