From the clutch, engine torque is transferred to the mainshaft through the input cluster gear. Each gear on the input cluster is in constant mesh with a matching gear on the mainshaft. It is these matching gear sets which will provide the 4 forward gear ratios. The transaxle gear ratio is determined by the number of teeth on the input cluster gear and the number of teeth on the mainshaft gear.
Reverse is accomplished by sliding a spur gear into mesh with the input cluster shaft gear and the reverse idler gear. The reverse idler gear acts as an idler and reverses the direction of mainshaft rotation. In neutral, none of the gears on the mainshaft are locked to their shafts. Then, no torque from the engine to the input cluster gear shaft is transferred to the differential assembly and to the wheels through the halfshafts.
Engine torque is transferred from the clutch to the input cluster gear shaft. The 4 forward gears on the input cluster gear shaft are in constant mesh with a matching gear on the mainshaft. The 4th gear on the input cluster gear shaft is simultaneously meshed with the 5th speed gear on the 5th gear shaft. These meshed gearsets provide the 5 available forward gear ratios.
Both the mainshaft and the 5th gear shaft have a pinion gear, which is constantly engaged with the final drive ring gear of the differential assembly. If a single gear (1st through 4th) on the mainshaft is selected and that gear is locked to the shaft by its shift synchronizer, then the input cluster shaft gear will drive the mainshaft pinion gear; driving the differential final drive ring gear. If the 5th gear is selected, the input cluster shaft 4th gear will drive the 5th gear shaft pinion gear, driving the differential final drive ring gear. At this time, the mainshaft gears will rotate freely.
Reverse is accomplished by sliding a spur gear into mesh with the input cluster shaft gear and the reverse idler gear. The reverse idler gear acts as an idler and reverses the direction of mainshaft rotation.METRIC FASTENERS
The metric fastener dimensions are very close to the dimensions of the inch fasteners, and for this reason, replacement fasteners must have the same measurement and strength as those removed.
Do not attempt to interchange metric fasteners for inch system fasteners. Mismatched or incorrect fasteners can result in damage to the transaxle unit through malfunctions or breakage and possible personal injury.