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Hello again everybody,

I put out a lengthy post a few months ago about my poor automatic transmission performance. I've more-or-less learned to accept it, for the car is otherwise quite good. The consensus among fellow owners was that Mazda's most recent transmission software compromises performance and drivability far too much, in the interest of fuel economy. "So be it," I said, and tried to look past the rough shifts, grinding sensation, lugging, jerking and near-stalling from cold. Figured I was overly sensitive to these issues since my last car (a Volt) was completely linear with its stepless electric drive system (which I highly recommend).

And yet the Mazda finds new ways to worry me -- in heavy stop-and-go traffic today, it felt as if the transmission were about to fail -- and my passenger took notice. Every time I apply or release the accelerator, the car shunts backwards and forth. It jerks and clunks in and out of first and second gear every time, and it sometimes grinds or lugs, as if caught between two cogs. Worst of all, if I have to apply more accelerator pressure to FORCE a much-needed downshift, then let off (as not to shoot forward and rear-end somebody), there's not only a jerk, but a shift flare. (The revs will rise normally, spike, then drop to the next gear.) If anybody is interested, I can try to replicate this behavior on film.

The car is brand-new, Japan-built, mechanically sound and with just hit 8,000 miles. Not trying to sound whiny -- I'm more curious about these issues than anything. Should it bother me as much as it does?
You are NOT imagining things... That is totally unacceptable. Figure out under what conditions this occurs, and replicate for the service mgr or better, the shop foreman or lead tech. Also, having it on video would be useful. This must be rectified...

If it were me, I would not care how comparatively good value the car is; unsmooth is unsmooth and it would not be acceptable to me under any condition.
 

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Have you tried to zero-base it, then start driving it as you wish to, and let it re-learn that?
 

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@BenDoyle , take extra care to NOT get any dirt in the ATF dipstick hole. If it were my car, I'd first remove airbox to clean IT, and to allow good visual- and cleaning access to the ledge where the dipstick is... YMMV, but just 'sayin.

Sometimes it's "stack-up of build- tolerances" that conspires to make the car not perform smoothly. For me, that'd be unacceptable, and despite $$ loss I'd sell and move-on...
 

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Go to the dealer and tell them you are having a "delayed engagement". This is usually indicative of a pressure issue or a combination of solenoids not allowing the Low/Reverse Brake and the one way clutch to actually operate like it is supposed to. It could also be causing the slip felt on take off.
@sinistriel , I was waiting for you to chime-in again; you seem to have good ideas re A/T's. One of the prbs the OP faces (I believe) is the apparent intermittency of this behaviour. Will it misbehave on command?
 

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@sinistriel , can you provide some guidance to Ben re how his SkyActiv-AT can be instrumented? You recently rebuilt one, correct? Are there external on the transaxle case pressure tap ports, or is a special trans pan with through-passing tubing sections necessary to "tap" into the valve body? I think the first thing he ought to do, is of course, a level check...but without any obvious fluid leakage (?), the probability of a factory fill muff-up is low...?
 
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