Quote:
Originally Posted by zain
The A10 trans. has a known issue with rough down-shifiting from 4th to 3rd only. it does shifts smoothly if you apply gas while downshifting (discovered that lately). I started noticing the rough downshifting after 15k, local dealer checked the car and said the trans. is working perfectly. I really dont know if its the same what your going through,, but if applying little gas fixes the issue then I am guessing that a software update could fix it.
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I doubt a software update will fix a mechanically issue.
The OP feels this when they are driving normally and when the car is shifting up in gear, not down. My car does something similar but it kinda hangs up for a split second before shifting.
If it's anything like the 8 speed issue in the Silverado/Sierra, then it will either need updated fluid or it'll need to be slightly overfilled. Yes, that's the fix GM has been using. They mainly blame it on the type of fluid that was being used and it causing condensation to build up.