System Description and Operation

The 41TE Ultra drive electronic four speed transaxle is a fully adaptive transaxle. The 41TE transaxle uses feedback sensors to adjust functions on a real time basis, similar to electronic anti-lock brake controls.

The 41TE transaxle provides four forward speeds with ratios of 2.84:1, 1.57:1, 1.00:1 and 0.069:1, and with torque converter lock-up available in second, direct, or overdrive gear. Reverse ratio is 2.21:1. The 41TE, Fig.1, consists of three multiple disc input clutches, two multiple disc grounded clutches, four hydraulic accumulators and two planetary gear sets to provide four forward speeds and reverse ratio. Electrical solenoids provide the transaxles shifting control. Sensors on the transaxle send control inputs to the electronic control unit located under the hood in a potted, diecast aluminum housing. The system can be diagnosed by accessing information from the electronic control unit memory. The transaxle and differential sump have a common oil sump with a communicating opening between the two.