Ok I'm kinda confused. some people say you are supposed to service your tranny every 40k miles but when I called a shop they said that servicing the tranny could cause big issues.

which is it?

I'm not having any issues when driving normally BUT when I drive down hills my RPM run up like a run away train which is kinda weird.

I did have my conductor plate changed some time ago...it was done at a indy shop so I don't know if there was something that maybe he didn't do right.

 

Every 40k the 7g gets a service.
It will be very important to stay on top of these services at the prescribed interval particularly if you’ve had a conductor plate replacement already.

You’re probably hearing the laments of a Indy mech who has serviced one too many neglected trannies, only to have them fail shortly after getting new fluid and filters.

 

When the 7-speed was first introduced, the specification was a one time only fluid/filter change at 40k miles.

sometime later this appears to have changed to changing these items every 40k miles.

I’m unaware whether this is a universal change or just a USA thing … the latter wouldn’t surprise me.

I’m now at 87k miles on my ‘07 and will likely do that 2nd change soon. I’ve had zero transmission problems.

 

have any of you 07 owners noticed any change when going down hill? when I drive downhill my RPMs go up to 2700-3000 and I'm going slower than 20mph.
It just seems weird to me.

 

Rpm change means either automatic gear change to lower gear or lockup clutch opening or lower gear commanded by the user via paddles.

 

I never touch the paddles and this is something that happens all the time.

is there something that would make any of that happen when going downhill?

 

Engine braking

 

what is engine braking? are you saying my engine is breaking down?

 

Engine braking is using the engine to help you slow down. To save brakes.

normally the transmission is pretty good with this. If you look at tacho as you come slowly to stop you will see it rise at it engages lower gear

Maxblast is right saying don’t use the paddle/shift switches. Just let it do it’s own thing.

assume you don’t have brake issues

 

Change the fluid every 40k miles
it's normal for all modern transmissions to increase RPM while going downhill if you are not pressing on gas.
when you are going downhill, and ease off the gas paddle, the computer recognizes that you are not asking for higher gear or fast speed, so it doesn't upshift. Now gravity makes it go faster and tires/transmission is now rotating faster than engine's power. So it rotates the engine faster along with it. Thus high rpm.
same thing will happen of someone would select D2 while going downhill on older transmissions.
if you were to accelerate while going downhill, it wont happen.

 

nope no brake issues

 

if it’s normal that’s ok I just want to know
my last car was a 2001 s500 which didn’t do that and I also have a 2017 maxima which doesn’t do that

What you described is spot on though…if I press the petal and accelerate it doesn’t do that

 

When it's engine braking, if you press on the accelerator it'll kick up to the next gear and stop the engine braking. Might be worth a shot to see if it's behaving normally.

 

@Mikchek When the rpm changes, does the gear also change? Are you experiencing downhill speed control (descent control)?

 

i don't fully understand "downhill speed control" but no the gear does not change...unless I press on the gas more...

 

did the tranny service...the fluid was BLACK!!!

the guy said he also noticed some shavings in it which is never good but after the service the tranny works A LOT better

it still does the downhill thing a lil bit but nowhere near as bad