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4-Speed Overdrive Gearset, Version 2. Overdrive Gearset. Overdrive gearsets combine two simple planetary gearsets so that the ring gear of each gearset is connected to the carrier of the second set.

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Presentation Transcript
overdrive gearset
Overdrive Gearset

Overdrive gearsets combine two simple planetary gearsets so that the ring gear of each gearset is connected to the carrier of the second set.

The transmission described as Version 2 is the DaimlerChrysler 41TE; its first designation was A-604. Similar models are the 42LE and 42RLE.

Tom Birch, 8/06

41te geartrain
41TE Geartrain

Underdrive ClutchRear Ring Gear Rear Carrier

Transfer Gears

Input Hub Overdrive/Reverse Clutch

Underdrive Hub Overdrive Hub Front Carrier Rear Sun Gear Differential

Transfer Shaft Final Drive Gears

Tom Birch, 8/06

schematic geartrain
Schematic, Geartrain

Front Ring Rear Ring Gear Gear

Rear Carrier

Front Carrier

Front Rear Sun Gear Sun Gear

Tom Birch, 8/06

overdrive geartrain
Overdrive Geartrain

Front RingRear RingGearGear

Note that the front ring gear and rear carrier are combined. The rear ring gear and front carrier are also combined.

Front Carrier

Rear Carrier

Tom Birch, 8/06

schematic control devices
Schematic, Control Devices

Underdrive Overdrive Reverse Clutch Clutch Clutch

2-4 Low-Reverse Clutch Clutch

Note that there are no bands or one-way clutches.

Tom Birch, 8/06

synchronous overlap shifts
Synchronous/Overlap Shifts

This is a transaxle with synchronous, overlap shifts. One clutch is released as another clutch is applied during upshifts and downshifts, and these events must be carefully timed or synchronized. Electronic controls help this happen seamlessly.

Tom Birch, 8/06

schematic neutral
Schematic, Neutral

Low-Reverse Clutch Applied

The Low/Reverse clutch is applied to to hold the front carrier/rear ring gear. This prepares for the N-D or N-R shift.

Tom Birch, 8/06

gearset neutral
Gearset, Neutral

Low-Reverse Clutch Applied

Tom Birch, 8/06

gearset 1 st gear
Gearset, 1st Gear

Underdrive Clutch Applied, Low-Reverse Clutch Applied

Gear Ratio, 2.8:1

Input Reaction Output

Tom Birch, 8/06

schematic 1 st gear
Schematic, 1st Gear

Low-Reverse Clutch Holding

Underdrive Clutch Applied

Gear Ratio, 2.8:1

Input Reaction Output

Tom Birch, 8/06

gearset 2 nd gear
Gearset, 2nd Gear

Underdrive Clutch Applied 2-4 Clutch Applied

Input Reaction Output

Gear Ratio, 1.6:1

Tom Birch, 8/06

schematic 2 nd gear
Schematic, 2nd Gear

2-4 Clutch Holding

Underdrive Clutch Applied

Gear Ratio, 1.6:1

The rear ring gear (yellow) transfers torque to the front carrier.

Input Reaction Output

Tom Birch, 8/06

gearset 3 rd gear
Gearset, 3rd Gear

Underdrive Clutch Applied Overdrive Clutch Applied

Input Reaction Output

Gear Ratio, 1:1

Tom Birch, 8/06

schematic 3 rd gear
Schematic, 3rd Gear

Underdrive Clutch Applied Overdrive Clutch Applied

Gear Ratio, 1:1

Input Reaction Output

Tom Birch, 8/06

gearset 4 th gear
Gearset, 4th Gear

Overdrive Clutch Applied

2-4 Clutch Applied

Input Reaction Output

Gear Ratio, 0.69:1

Tom Birch, 8/06

schematic 4 th gear
Schematic, 4th Gear

2-4 Clutch Holding

Overdrive Clutch Applied

Gear Ratio, 0.69:1

Input Reaction Output

Tom Birch, 8/06

gearset reverse
Gearset, Reverse

Low-Reverse Clutch Applied

Reverse Clutch Applied

Gear Ratio, 2.2:1

Input Reaction Output

Tom Birch, 8/06

schematic reverse
Schematic, Reverse

Low-Reverse Clutch Holding

Reverse Clutch Applied

Gear Ratio, 2.2:1

Input Reaction Output

Tom Birch, 8/06

variations 42le
Variations, 42LE

The 42LE transaxle is used with a longitudinal mounted engine. It uses the same gearset with a transfer chain and sprockets and a hypoid final drive gears.

Transfer Chain & Sprockets Hypoid Gearset

Tom Birch, 8/06

variations 42rle
Variations, 42RLE

This transmission has a different case with an extension housing and output shaft extension (11). It is used in RWD and 4WD vehicles.

Tom Birch, 8/06

variations 62te six speed
Variations, 62TE Six-Speed

Four Speed Gearset

Compounder Gearset

Tom Birch, 8/06

comparison of shift points
Comparison of Shift Points

Six speeds allow the engine to stay closer to optimum efficiency than four speeds.

Tom Birch, 8/06

compounder assembly
Compounder Assembly

1. Transfer Shaft 2. Planetary Gear Set 3. Direct Clutch 4. Low Clutch 5. One-Way Clutch

Tom Birch, 8/06

planetary assembly
Planetary Assembly

Carrier (output)

Sun Gear

Clutch Housing

Ring Gear (Input)

Tom Birch, 8/06

what s on when
“What’s On When”

Tom Birch, 8/06

62te powerflow 1st gear
62TE Powerflow 1st Gear

Underdrive Clutch (1) Applied Low-Reverse Clutch (2) Applied Low Clutch (3) Applied One-Way Clutch (4) Effective

Tom Birch, 8/06

62te powerflow 2nd gear
62TE Powerflow 2nd Gear

Underdrive Clutch (1) Applied Low-Reverse Clutch (2) Applied Direct Clutch (3) Applied

Tom Birch, 8/06