What is Overdrive in A/Ts?

**Kelso Hatch** · November 25th, 2002 11:29 AM

Para saan ba yung "Overdrive" button sa shift lever ng Frontier 3.2L A/T? Thanks!

**Ungas** · November 25th, 2002 11:53 AM

Generally speaking, overdrive (O/D) is the highest gear in the transmission. On most cars the automatic transmission has 3 speeds and Overdrive (forth speed). Overdrive allows the engine to have less rpm with higher speed in order to have better fuel efficiency. When you switch it on, you allow the transmission to shift into overdrive mode after the certain speed is reached (usually 50 - 70 kph depending on the load). When it's off, you limit transmission shifting by third speed. In normal driving condition the overdrive should be always on. You may need to switch it off if you drive in mountains area.

The automatic transmission automatically shifts from OD to the 3rd gear when it feel more load. When it feels less load it shifts back to the O/D, but under certain conditions, e.g: driving uphill or towing a trailer, the transmission can not decide to stay in OD or to shift into 3rd speed and it starts to shift back and forth. That's the time you may switch it off and help the transmission to decide.

You also may need to switch it off when you want to slowdown using the engine braking, for example, driving downhill. :D Hope this info helps you sir.

**Kelso Hatch** · November 25th, 2002 12:01 PM

Ungas, maraming salamat.

**Ungas** · November 25th, 2002 12:04 PM

Kelso Hatch::: Your are welcome po. :mrgreen:

**OTEP** · November 25th, 2002 12:06 PM

Ungas,

Nasa bahay ka ba? Hehehe. Kagagaling ko lang sa opis ni Afrasay.

**GlennSter** · November 25th, 2002 12:10 PM

hoy walang ot mr admin.herhehrherh

tama po si ungas...well explained...ung mga matic cars namin naka OD lahat....

pwera nalang pag hataw arangkada!!!

**Ungas** · November 25th, 2002 12:12 PM

Originally Posted by OTEP

Ungas,

Nasa bahay ka ba? Hehehe. Kagagaling ko lang sa opis ni Afrasay.

Opo andito pa, tinatamad mag work, hehehe :mrgreen: Lapit lang dito opis ni sir Alfred.

**OTEP** · November 25th, 2002 12:15 PM

Sayang! Tagal din namin nagkwentuhan sa bangketa. Hehehe. Nandito ko sa UST now.

Glenn10,

Keep quiet lover boy. Hehehe.

**Ungas** · November 25th, 2002 12:16 PM

Glenn10::: Ganyan din ginagawa ko sa Altis A/T pag hatawan na sa highways, kelangan ko yung extra effort ng engine para di mabitin sa overtaking. :mrgreen: