The Sparklight Gearbox Johannesburg branch is our head office. Operating for over 25 years, Our Johannesburg branch has slowly grown to become one of the largest gearbox repair workshops in the country with facilities for passenger and commercial vehicles. The Sparklight Gearbox Johannesburg branch is our head office. Operating for over 25 years, Our Johannesburg branch has slowly grown to become one of the largest gearbox repair workshops in the country with facilities for passenger and commercial vehicles. Some of our facilities include a workshop of approximately 40 lifts, 8 work benches for stripping and re-assembling gearboxes, a torque converter and prop shaft rebuilding plant, our administration centre, quality control area, wash bays and car wash.