2008 Infiniti g35 automation transmission

I am facing issue with my transmission when on Drive or DS.
First, When moving from stop after a few seconds the rpm goes down and then back to normal.
Second, when car gets on 3rd gear and I leave the gas car goes on auto gas.
Third, while reducing or coming to a stop rpm drops more than normal and gets back to normal.

I have 216,000 kilometers in car but I usually use nissan full synthetic engine oil and I have flushed transmission fluid cleaned the oil pan and put genuine nissan transmission fluid but still facing this issue.

Please help me or advice and if anyone needs for information please do reply.

Thank you

 

Rpm drops like that are usually a vacuum leak.

 

I have faced vdc and slip light coming on while driving all of sudden but then when I pull over switch off and on the engine it’s gone.

 

Check your brake fluid level, if it's fine then schedule a diagnostic at Nissan.

 

I will do that and update you. Thank you for your help