Quote:
Originally Posted by Isow
My 328 auto also rolls.
Whenever I stop, say at traffic lights I put the auto gearbox in P.
I only apply the handbrake when I finish my journey.
Am I causing wear and tear on the auto transmission ?
The salesman told me that he always uses the P when he stops and not the handbrake.I assumed the P was just like an electronic handbrake.
Am I wrong ?
I would like to emphasise that the car rolls identically, whetherI put the handbrake on or whether I press the P button on the auto gearshift.
That's why I assumed P was an electronic handbrake.
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The gearbox has a kind of pawl mechanisn that engages to prevent driveshaft rotation, so you are loading the drivetrain if parking on it on a slope.
When I park I always (due to habit with auto gearboxes, not just BMW) engage the parking brake, let the parking 'weight' sit on that, then engage 'park' to prevent loading the gearbox. Previous generations of auto gearboxes have had have issues with premature wear in the pawl, if used to park the car with load on it. You can sense it is loaded.... when you engage 'drive' to move off and it "clunks", sometimes quite violently, as the load is released.
How strong the mechanism is in the ZF 8-speed boxes, we are yet to find out.
HighlandPete