What is the mileage for the transmission getting changed? My car has almost 100k and as far as I know it's the stuff from 2008 and the maint. book I was looking at just kept saying "inspect fluid".

Not sure if I should just drop the pan and filter and add new stuff or if I should have it flushed instead.

It's due for the diffs and transfer case as well so I may get errrthang done at once or try to DIY as much as I can. Getting all four wheels off the ground while keeping it level has always been problematic for me so generally I have taken it in.

That said, anyone have a best practices for that I am all ears! I just always fear jacking the car up while one half is already on jacks.

 

If you're at 100k you might as well do a drain and fill anyways.

 

Last week, I got done a full transmission flush with the Nissan matic-S ATF. My car was at 67k miles, 2011 G37S sedan.

Let me say, the car shifts so much better. Idk if you use manual mode, but when you downshift, there is rarely any more bog. I also installed my cats than reset the ECU and the shifting is faster / better than ever.

Highly recommend it. Next is to do my brake fluid and coolant.

 

Yep, I'd do it, here's the site DIY if you haven't seen it, and if you have ramps to lift the front that will simplify things Dealers are all over the map on pricing and what they actually do, some are just a 1x drain & fill, some do the whole 3x drain & fill, and not sure, but I think some pressure flush the whole system, so if you have a dealer perform the service be sure to ask what the service consists of. One real advantage of the DIY here is you remove the pan to clean the buildup on the pan and the pan magnets. https://www.myg37.com/forums/d-i-y-i...rop-clean.html

 

I have my full flush on the schedule for Friday, I hope I get the same positive results most others seem to get... Might make me hate the 7AT just a little less.

 

I have changed my trans / transfer case fluid approx every 35k. No issues and the trans still shifts well.

I have heard lots of mixed things about flushes... some people say it can cause issues, others dont.

 

For the ones getting full flush service what were you charged? And yeah, there are mixed reviews about getting a pressure flush performed, but I would assume if the dealer is doing this they follow strict procedures. FWIW there's no flush info on any of the Factory Service Manuals, so this may be something new to the dealerships or a service that has been approved but not documented perhaps??? Here's the FSM for the 09 Sedan, but all the 7AT FSMs are the same just scroll to page 267 Factory Service Manuals - NICO Club

 

I paid about $260 for a full flush in 2014. Last time the dealer would only do a drain/refill because of a TSB issued by Infiniti. If you do find someone to do a full flush I would suggest that NO additional chemicals be used; only Infiniti ATF.

 

Power flush is not a good idea for an Automatic transmission. I used to work at a transmission shop as R&R tech and we had tons of people coming in with broken transmissions after they had Jiffy lube or some other shop power flush their tranny. The power flush systems run pressurized fluid backwards through your transmission. This also takes anything the filter has caught and puts it back through the transmission. This can cause anything that's not perfect to break. The transmission shop I worked at only recommended dropping the pan and changing the filter. Power flush will do more harm than good. Just a recommendation though it’s your car and your choice.

 

Why you no like??? I hate the 5 speed in my 2008 lol



And yes, I have heard the same thing about flushes. I would be happy with the pan drop and filter change if I can fit under there. I was going to check online today and see if Niss or Inf dealers had any service specials before I crawl my goofy looking self under the car. I have always been intimidated by transmissions though.

 

Is the only risk of the power flush that it essentially agitates any buildup in the pan, filter magnets, etc.? What if the power flush is performed after dropping the pan and cleaning out all the gunk?

 

I think it would be in the FSMs if it was something the dealers would be doing, and since it's not in the FSMs I'd just stick to the drain & fill methods detailed in the FSM I posted above. And if it's you that will be dropping & cleaning the pan it's not much more work to DIY the drain & fill 3x.

 

FWIW -

Due to time constraints I unfortunately had to forego the DIY on this and have the work performed at a dealership. But, before doing so I made some calls to see what the pricing and service offering was like at my surrounding Infiniti Vs. Nissan Dealerships...

Results were kind of all over the map...

Infiniti - quoted $340 for the 3X drain and fill - would not drop the pan.

Nissan 1 - quoted $275 - for 3X drain and fill - Tech had no clue what I even meant by dropping the pan... no go.

Nissan 2 - quoted $210 - Spoke with a tech who specifically stated they do pressure flushes, not drain and fill - again, very unsure about dropping the pan because "we really only work on CVT's these days" - no go.

Nissan 3 (winner) - quoted $190 - 3X drain and fill - Got lucky and spoke with a tech who actually knew a bit about Infiniti's . When I called (the 2nd time) to make my appointment, I again made sure to specifically request that the pan be dropped and cleaned, and made sure this was confirmed by the head service tech and not just the ditzy service receptionist. Their only concern with dropping the pan was possibly having to replace the gasket. From what I have read it sounds like most have been fine just reusing the original gasket so I told them I'd roll the dice on that and to proceed. They also were kind enough to let me walk into the service bay and look at the old fluid, pan, gasket, etc. none of which actually looked too bad, I'm at 61K. I also found a $10 off service coupon online while I was waiting . So I ended up paying $182 out the door.

First impressions:
So far I've only driven from the dealership to my office - about 15 miles mostly freeway. Shifting is noticeably smoother, down shifts are much less "clunky" ESPECIALLY when rev matching in DS mode, right off the bat a major improvement. I am curious to see if the car feels any better in stop and go conditions where it previously just seemed confused about what gear it should be in...

Bottom line - if your having a dealership perform this service, do your homework gents..

 

This is one of those services that should be done on a somewhat regular schedule. This way, you're not mixing 100K mile fluid with new when dropping the pan. Similar to periodically changing the coolant by way of a drain/fill.

 

Thanks for the insight T! I am in the middle of doing the same thing with Inf and Nissan dealers as well.

Yeah def knocks on the importance of that 3x procedure to make sure you're getting all the old stuff out of the way. Based on what I am hearing from dealers they don't get into that much effort so this may end up being a DIY.