2007 Versa, 190,330 + miles. In the past couple of days, and significantly today, I've noticed a slipping or chugging feeling when accelerating at lower rpm (<1800) and between 15-40 mph. First thought was transmission fluid, which we checked. It is not low, only slightly discolored, and doesn't seem to have any particulates in it. Next thought is a vacuum issue, but I can't find info on that in my Chilton's manual. Any thoughts or suggestions? I'm female, so going to a mechanic without some knowledge (and my husband) will certainly lead to misinformation and overcharging by the dealership and/or mechanic (sad, but true!)

Sounds like the issue we had with my wifes 2012, thankfully still under warrenty. they ended up replacing the transmission.

Having a CVT fluid change and servicing might be in order. How many miles since the last one?

A LOT of people misconstrue engine performance issues as trans ones. I say that here based on the 'chugging' word which is not usually a word used in conjunction with trans.

If you have a tach on the car (as it appears by the under 1800rpm thing) then watch it as the so-called 'slipping' happens, the tach will move up in rpm suddenly. If not then the trans is not slipping. The problem of course being to separate normal tach rpm increase at acceleration from abnormal at trans slip. You WILL see a change though if paying attention. Tach will increase more suddenly at a slip, the rate of increase changes.

Any vacuum issue if you are talking about a vacuum leak generally shows up more at lower rpm like at idle, the idle quality goes to crap.

K8LNLISE...did you every figure out what was wrong

The CVT on my SL started slipping and soon after it failed. Sorry about that.. but at least you got a lot more miles out of it than many people do!