I noticed the past few times on my 2k Sentra around 2200-2400 if I am in 1st or 2nd gear accelerating really slow, the car coughs in that area, it jerks you a bit basically, then its fine, but if I have more than 1/4 throttle its fine...weird!

 

why its set that way and what you can do about it are still a mystery.

 

lately I noticed that the car jumps in 2nd gear when I take off normal. I don't think i'm taking the clutch off too quick.. but dammnn the car jumps, I'll give it a few days and then I'll change tranny fluid again. I try to get that tranny fluid out of there every 6-7K miles but this just started within the last 3 weeks or so.. I don't know its getting cooler outside so that might have something to do with it.. does it when the car is a little cold.