Description And Operation: Geartrain: Notes

Power is transmitted from the torque converter to the Ravigneaux geartrain components through the input shaft and forward clutch cylinder.

• The geartrain contains a Ravigneaux planetary set connected by dual pinion gears.
• By holding or driving certain components of the gearset, four forward ratios and one reverse ratio are obtained and transmitted to the output shaft. The ratios are as follows:
  GEAR RATIO
  
  

  Gear Ratio
  1st	2.84 to 1
  2nd	1.55 to 1
  3rd	1.00 to 1
  4th	0.70 to 1
  Reverse	2.32 to 1

• Components of the geartrain can be held by bands or clutches and driven by clutches only.

This transmission uses:

• two bands.
• two one-way clutches (one roller, one mechanical diode).
• four friction clutches.