Help, New Owner of 221k milage 2009Z

[Arman080]

Thanks for the warm welcome guys. Its good to know the engine can last to such high mileage. My car's engine is extremely solid and delivers when you want it to, Which I'm very very happy about as a 19 year old. The car has never been winter driven and it's never been in an accident. The gentleman who I purchased it from had many toys and admitted to driving it hard from time to time (never tracked), But the Z has mostly highway miles, it was his daily. I did some more test driving, The car shifts up very smoothly. The problem happens when the car downshifts. There is no noise but from the inside it feels as if the car moved. It can't be just the car downshifting since its not consistent. Also when stopped the car does the same jerking motion when you go from Park to drive and vise versa. The car doesn't actually move forward or backwards, it's kind of like the car going up and down. It's probably suspension or the mounts holding the trans/engine. Quicksilver when you say service your transmission what do you mean exactly?

[Quicksilvers]

Originally Posted by Arman080

Thanks for the warm welcome guys. Its good to know the engine can last to such high mileage. My car's engine is extremely solid and delivers when you want it to, Which I'm very very happy about as a 19 year old. The car has never been winter driven and it's never been in an accident. The gentleman who I purchased it from had many toys and admitted to driving it hard from time to time (never tracked), But the Z has mostly highway miles, it was his daily. I did some more test driving, The car shifts up very smoothly. The problem happens when the car downshifts. There is no noise but from the inside it feels as if the car moved. It can't be just the car downshifting since its not consistent. Also when stopped the car does the same jerking motion when you go from Park to drive and vise versa. The car doesn't actually move forward or backwards, it's kind of like the car going up and down. It's probably suspension or the mounts holding the trans/engine. Quicksilver when you say service your transmission what do you mean exactly?

Yes,it is possible that failed and/or leaking differential bushings could be the culprit but you will never know until you have your Z diagnosed. What I mean by servicing your transmission is you must always flush and refill your transmission fluid on time it is detrimental to your 7AT transmission don’t shorten the life of your 7AT transmission by not changing your transmission fluid on time. Also our 7AT transmissions are expensive to rebuild or replace. If you can’t change your transmission fluid yourself take your Z to a reputable shop you trust or a Nissan dealership service department and have your transmission fluid flushed and refilled.