Power transmissionNotes on ?Automatic gearbox 001?
| Notes on “Automatic gearbox 001” |
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| The 001 automatic 4-speed gearbox is fitted with four hydraulically controlled gears. 3rd and 4th gear are controlled mechanically when the clutch cancellation of the torque converter is closed, thus avoiding torque converter slipping. |
| The control device has two programmes for two different driving styles; sports (“SPORT” programme) and economic (“ECO” programme). |
| These two programmes are automatically connected by the control device. |
| The automatic gearbox control unit -J217- receives information from the components which influence the gear change. This is transmitted to the slide box with the solenoid valves which in turn activate the final control elements via hydraulic connections. |
| So that the cause of an electrical/electronic component failure or a short circuit can be quickly discovered, the control unit is fitted with a fault memory. Faults are recognised via electrical signals and are memorised in the fault memory. |
| The torque converter is fitted with a cancelling clutch. The cancelling clutch closes according to load and speed, engaging 3rd and 4th gears mechanically and with no slipping. |
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| The ATF in the gearbox does not need to be changed. It does not need to be changed during routine maintenance. |
| If it is necessary to top up, only use ATF fluid ref. no.: |
| The ATF level in the planet gears and drive shaft is checked and filled together → Chapter, ATF level: checking and filling. |
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01 Transmission
