2

How do early transmissions know when to shift? How do they go to the right gears for the right conditions (heavy acceleration, going up a hill etc.)? I cannot imagine how it is done without electrical components, but it seems like they were purely using hydraulics.

  • As an interesting source check out Lanchester... – Solar Mike Sep 20 '19 at 16:43
  • Yes, with hydraulics. Here is a description of how it used to be done. – Weather Vane Sep 20 '19 at 17:17
  • @WeatherVane Thank you! The link is really helpful! – Eric x Sep 20 '19 at 17:37
  • The governor controls shift points. – Moab Sep 21 '19 at 19:02
0

Hydraulics or vacuum. Engine spins torque converter and pump, fluid flow directed by valve body for shifting.

| improve this answer | |
  • The first automatic transmission was GM's Hydramatic and I don't think that hydraulics are strictly categorized as 'mechanical' but they are 'non-electric'. – user16128 Feb 18 at 2:20

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.