Hewland Engineering Ratio Chart Help INDEX CHOOSING THE CORRECT GEAR RATIOS - how to use the Ratio Chart. LD 5 SPEED GEARBOX. NMT AND TE INTEGRAL GEAR LAYSHAFTS METHODS OF CHANGING GEAR PRINTING YOUR RATIO CHART   To go to the main Hewland web site to see the full gearbox range, gallery, agent network, illustrated parts lists, ratio lists, and much more........... Click