Use Parking Brake with PDK?
#1
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Use Parking Brake with PDK?
In the old days, an automatic transmission could be put into "P" (Park) and it made the parking brake redundant. Even in hilly San Francisco, I can't remember the last runaway car. That includes some of the 15 million tourists who have never seen a hill, let alone parked on one, and had to curb the wheels. They just shove that rental car into "P" and the car is still there when they return.
Of course a car with manual transmission required using the Parking Brake except for those who chose to put the car in gear opposite to the direction of roll. But that always reminded me of clenching your teeth at night.
Now with the dual clutch PDK, is it essential to use the Parking Brake. Or just use it when parked on hills for belt and suspender double protection?
What do you do?
Of course a car with manual transmission required using the Parking Brake except for those who chose to put the car in gear opposite to the direction of roll. But that always reminded me of clenching your teeth at night.
Now with the dual clutch PDK, is it essential to use the Parking Brake. Or just use it when parked on hills for belt and suspender double protection?
What do you do?
#2
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In the old days, an automatic transmission could be put into "P" (Park) and it made the parking brake redundant. Even in hilly San Francisco, I can't remember the last runaway car. That includes some of the 15 million tourists who have never seen a hill, let alone parked on one, and had to curb the wheels. They just shove that rental car into "P" and the car is still there when they return.
Of course a car with manual transmission required using the Parking Brake except for those who chose to put the car in gear opposite to the direction of roll. But that always reminded me of clenching your teeth at night.
Now with the dual clutch PDK, is it essential to use the Parking Brake. Or just use it when parked on hills for belt and suspender double protection?
What do you do?
Of course a car with manual transmission required using the Parking Brake except for those who chose to put the car in gear opposite to the direction of roll. But that always reminded me of clenching your teeth at night.
Now with the dual clutch PDK, is it essential to use the Parking Brake. Or just use it when parked on hills for belt and suspender double protection?
What do you do?
I remember the days when the 'park' setting in an automatic transmission was mostly a throwback to manual transmission days. A pawl engaged a gear on the driveshaft...[?] well, one of the shafts anyway. That pawl could be rounded off with wear and tear, and could pop out of engagement. Darned if I know how they do it with a PDK, but I'll bet two things. No, three:
- It isn't one percent as likely to "pop out" as the original automatics;
- Manufacturers will be telling us to use the parking brake also long after automatic Danforth deployment systems are standard;
- I never will feel comfortable in Berkeley without a parking brake engaged.
#3
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I remember the days when the 'park' setting in an automatic transmission was mostly a throwback to manual transmission days. A pawl engaged a gear on the driveshaft...[?] well, one of the shafts anyway. That pawl could be rounded off with wear and tear, and could pop out of engagement. Darned if I know how they do it with a PDK......
Parking lock
Even if the vehicle is in gear, it cannot be prevented from rolling back in the same way as on a manual transmission because the clutches are opened in a depressurized state and therefore do not stop the vehicle from moving. The parking lock prevents the vehicle from rolling away, as with an automatic transmission.
When the vehicle is stationary, the parking lock is engaged (purely mechanically) using the selector lever and blocks the pinion shaft via a catch, which engages in the toothing of the parking-lock gear. The final drive is blocked in this way.
Image left: 1. Selector shaft 2. Parking lock gear 3. Catch
Image right: 1. Detent spring 2. Selector shaft 3. Detent disk 4. Connecting rod 5. Catch 6. Leg spring 7. Parking lock gear
Even if the vehicle is in gear, it cannot be prevented from rolling back in the same way as on a manual transmission because the clutches are opened in a depressurized state and therefore do not stop the vehicle from moving. The parking lock prevents the vehicle from rolling away, as with an automatic transmission.
When the vehicle is stationary, the parking lock is engaged (purely mechanically) using the selector lever and blocks the pinion shaft via a catch, which engages in the toothing of the parking-lock gear. The final drive is blocked in this way.
Image left: 1. Selector shaft 2. Parking lock gear 3. Catch
Image right: 1. Detent spring 2. Selector shaft 3. Detent disk 4. Connecting rod 5. Catch 6. Leg spring 7. Parking lock gear
Last edited by Mike in CA; 12-30-2012 at 02:26 AM.
#5
I always use the Park Brake. I'm probably a little old fashioned, but I prefer the "load" to be on the brakes than the gears, or park paw, in the tranny. I do this on all my vehicles and even on flat ground.
#7
I just wish it automatically engaged the parking break when turning off the car. I've got a manual, and that would be a nice feature. Especially if the setting could be toggled via the PCM.
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