- State of Jefferson
- 2017 CX-5 GT AWD+
Yrwei, what are the changes they made to the tranny? How does CD play into it?
From available document on cylinder deactivation, Mazda says:Yrwei, what are the changes they made to the tranny? How does CD play into it?
MAZDAS NEW CYLINDER-DEACTIVATION OFFERS IMPROVED FUEL-EFFICIENCY WITHOUT SACRIFICING DRIVING PERFORMANCEThe challenge with four-cylinder deactivation is that an engine running on two cylinders is more likely to cause vibration. Mazdas breakthrough solution to compensate for this is to use a fulcrum inside the six-speed SKYACTIV-DRIVE automatic transmission, helping ensure seamless transition between two- and four-cylinder operation.
This is why I asked:They both use the same gearbox hardware but whether the settings are the same, you*d have to ask Mazda. They probably do but that is my opinion, not my knowledge..
I'm just trying to correlate the anecdotes people are reporting with different yrs/models having this problem to find the common factors.From available document on cylinder deactivation, Mazda says:
MAZDAS NEW CYLINDER-DEACTIVATION OFFERS IMPROVED FUEL-EFFICIENCY WITHOUT SACRIFICING DRIVING PERFORMANCE
To control vibration caused by cylinder deactivation, the added components with additional software controlling them may cause some side effects making transmission jerking during the low speed.
Is this what folks are describing in this thread or is it the rough/jerky downshift into 1st when slowly rolling to a stop? My 19 has the jerky downshift into first. I dont notice it on the 16.5.Something that Im noticing on the 19, that I dont really find on the 16.5 that is more annoying(and concerning) is that it seems confused when going into second under some scenarios.
light acceleration from a stop, lift off the throttle slightly as it goes into 2nd, then get back on the throttle- the RPMs jump for a second then drop down as it engages into 2nd.
Slowing down to make a right turn with no stop sign, lift off the throttle, make the turn, get back on the throttle, the RPMs jump for a second then drop down as it engages into 2nd.
When the RPMs jump, its around 500 over where it engages.
If I dont lift of the throttle, the RPMs dont jump. However, it seems like its a softer shift into second than the rear of the gears.
Yes, cylinder deactivation is only featured on naturally aspirated SkyActiv-G 2.5L since 2018 MY. 2.5T does not have CD. So far every such complaint including OP is from 2018 / 2019 CX-5 2.5L NA with CD.If we're thinking the cylinder deactivation is to blame, then the next question is are turbo others experiencing this? Cuz I don't believe the turbos have cylinder deactivation.
But all complaints weve seen here are from 2018+ MY CX-5 non-turbo 2.5L Touring and GT. So your assumption is irrelevant.For what its worth, my BMW does this too. I think its just an annoying habit of these turbo-fours tuned with a sporty throttle response. They can probably soften it with a tune, but Im guessing itd come at the expense of some acceleration performance.
I dont think there are enough dots connecting this to CD, especially considering that feature doesnt even come into play until cruising speeds.
Is the following correct?
2019 normally aspirated models have CD, the turbos do not.
Therefore, the NA and T have different engines AND different transmissions.
Or do the turbos use the same tranny?
Based on official Mazda document I posted earlier, Mazda added a fulcrum inside the 6-speed SkyActiv-Drive transmission to fight against the vibration from cylinder deactivation.This is why I asked:
I'm just trying to correlate the anecdotes people are reporting with different yrs/models having this problem to find the common factors.
nope, 2014 Touring here. I can feel jerkiness/lurching after backing out of the driveway after a cold start, putting it in Drive and even just pressing the accelerator slightly.Yes, cylinder deactivation is only featured on naturally aspirated SkyActiv-G 2.5L since 2018 MY. 2.5T does not have CD. So far every such complaint including OP is from 2018 / 2019 CX-5 2.5L NA with CD.
I also have a 2.5t wih what appears to be a similar issue. However, I dont have any of the clicking/popping noises.Youre the first out of many active 2.5T owners here is having such complaint. You could be experiencing something different like jmhumr described above.