Although these transmissions are extremely economically priced, they feature an extreme high quality. Gears and shafts are made of High Stress gear steel and have a smooth tooth surface that guarantees a noiseless and trouble free transmission. When you are used to cruise at high speed an Eco Line 6 Speed overdrive transmission is the choice for you. This offers the same 1 to 1 gear ratio in 5th gear as a stock 5-speed transmission, but a 1 to 0,86 ratio in 6th gear. This reduces engine speed with as much as 14%, providing considerably extension of engine life with fewer vibrations and reduced fuel consumption. Zodiac's Eco Line transmissions feature a 2 year limited warranty and are available for 1990 thru 1999 Softails. Note: The use of an electronic speedo on a 6 speed transmission on 1994 to present models may require the use of a recalibration unit such as ZPN236690 or 236082.