When going 20-30 mph, with my foot slightly on the accelerator my car will hiccup. Its almost like its shifting into 3rd gear really hard. I have a g35x 07. 5AT any thoughts? I was considering cleaning out the throttle body as other owners said it has improved throttle "smoothness".

 

how many miles? could it be a malfunction in the tranny? my mercedes used to hesitate at around the same speeds... hence why i drive a g35 now

 

Yeah I would think it was the tranny not the throttle body. But couldn't hurt to clean it out, well unless you do it wrong... Gl

 

OP you have 2 throttle bodies. Make sure you clean them both if you go that route. I would also suspect the transmission.

 

my pathfinder does this going around 30-35 the tranny doesn't know whether to shift to 3rd or keep at 2nd.