• 0 Posts
  • 13 Comments
Joined 1 year ago
cake
Cake day: June 14th, 2023

help-circle

  • I mean, my gripe is more about the lack of power on the wheels. It’s less about the time it takes to re-engage the clutch, more the overall time the clutch is disengaged. I want to accelerate briskly (not flooring it) and then cruise at a steady speed, to achieve maximum fuel efficiency. A good automatic handles this very well, and generally makes driving easier and more relaxed. Sure, changing gear manually and getting the clutch right can be fun, but it’s objectively a worse way of doing things.


  • Sure, a 0-60 hits all gears and requires 5 shifts to be done smoothly, but that’s rare.

    That depends entirely on where you are driving. Come to a T-junction in the middle of the countryside, national speed limit, and you can easily find yourself doing that. Even on a motorway, in heavy crawling traffic, there will come a point where everyone accelerates back up to full speed. Even if you don’t find yourself in these situations, changing from 3rd to 5th (or 6th) has you working through the gearbox.

    Many automatics will use engine breaking also. They will downshift through the gears as you brake. And, if you want to select a gear for a specific reason, you can either put it into manual and select the gear (or if you have padals leave it in auto and downshift with those) for either a corner or to prepare for an overtake, then you can complete the maneuver and either mash all the way up or straight back into auto, then it will handle all the acceleration optimally itself. Best of both worlds.

    I had one that had a sport button, this also changed the automatic shifting profile. In particular, it wouldn’t shift up a gear until the next gear was above 2000RPM, where the first stage turbo comes in with diesel. So power was always on tap, rather than having to wait for a gear change from a low rev cruise.

    It’s not about drag racing or any other type of racing, it’s about efficiency and minimising wear and tear on the equipment. Even the best drivers aren’t perfect every time. An auto isn’t either, but in general it’s closer.

    A manual is better than a bad auto, but a good auto is better than any manual.


  • Manual drivers get very good at this, and add engine speed / accelerate on downshifts (ex: going from 4000 RPM to 5000 RPM as you go from 4th gear to 3rd gear), you can just apply the accelerator thereby adding engine speed to assist the clutch in matching RPMs for a smooth transition.

    I’ve seen manual Fords with a little trick where it holds the revs at the speed for the next gear up, just for a second or so, to make it easier to get a perfect gear change. However, even then an automatic is far better for maintaining acceleration, and therefore more accelerating more efficiently.

    In all three cases, modern automatics are heavier, require more parts, more assembly. Reliability is getting better however, and as computers minimize engine slippage the transmissions are having less stress applied to them in general.

    Yes that’s the thing, cars already have ECU’s in them as a standard feature now (along with fly-by-wire in general), so the gearbox control is essentially an additional software function rather than any significant part cost. Electronic control is much less likely to burn out a clutch.

    But yeah, the additional weight is what has always made autos perform worse. However in terms of cost, I do feel like automatics might come down and beat manuals eventually, particularly as traditional manual gearboxes become more rare and automatics scale up. In any case, the price a car sells for is almost completely detached from the actual cost - the price is set as high as they can get away with, not as a percentage of parts and labour. In this way, an automatic can easily be more profitable than a traditional manual.