I had my engine replaced under warranty around 88,000 miles. I have heard different things from different service advisors in different dealerships weather I still need to do the 90K service or some components of it. It ranged from none to only doing transmission fluid change.
One problem is that, for example, the transmission fluid quote I got was for $340! The whole 90K service costs around $750. So If it is really necessary to do something,maybe it's better to go ahead and do the whole package?!

 

Whats the mileage on your current engine?

 

6K miles!

 

i would still do everything that doesn't relate to engine like transmission, cabin filter, air filter, rear diff, possibly brake fluid. just to get fresh fluids/filters everywhere. and look for a reputable local shop, 340 seems very high for just trans fluid or do it yourself its not that difficult

 

From the cost, you're having the Infiniti stealership do the work....why? You live in SoCal call CarZone in Van Nuys 818-373-1330 they're Nissan trained mechanics and will do the job for way less than what you were quoted. Trans drain/fill, differential and possibly the radiator if it wasn't changed when you had the new engine installed. A filter or two and you're back on the road without draining your wallet too....Gary