A transmission is also cheaper than a life or car. Coasting downhill can create a variety of issues. Speed control, steering response (because of increased speed, reaction time, etc), and the necessity to select the proper gear when you need to. If you are pinching pennies to this point, maybe you should move on to something else. It's a dang V6 guys. At most it's a 40k-ish car. Coasting isn't worth the risk in my eyes. If you are good with accepting the risk, that is your prerogative. Fuel consumption will be minimal because you are NOT accelerating. Take it for what it is worth!
__________________
 2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL
|