Models in the 18-speed series have eighteen forward speeds and four reverse, consisting of a five-speed front section and a 4-speed auxiliary section. The auxiliary section contains LO and HI range ratios, plus a splitter gear. The LO position in the front section is used only as a starting gear, it is never used when the transmission is in HI range. The other four ratios are used once in LO range and once again in HI range. However, each of the five ratios (LO-1-2-3-4) in LO range and each of the four ratios (5-6-7-8) in HI range can be split with the splitter gear.
After shifting out of the LO position, you use the easy Roadranger repeat “H” shift pattern. LO range and HI range are selected with the range lever. It is used once during the upshift sequence and once during the downshift sequence. Always preselect the range shift. After preselection, the transmission automatically makes the synchronizer range shift as the shift lever passes through neutral.
General Transmission Notes:
1. Length Listed lengths are installation dimensions from the face of clutch housing to front bottoming surface of companion flange or yoke, except AT-1202 and 2-A-92, which are from bottoming surface of input yoke to bottoming surface of output yoke.
2. Weight Listed weights are without clutch housing, controls and lubricant unless otherwise specified. All weights are approximate. Add 7 lbs. [3.15 kg] to models with an internal oil pump.