Yes I have searched and yes I read a few threads on the matter. and from what I got so far there is no straight answer in any of the threads I read. Infact someone just let it leak slowly for over a year and never experienced any problems with their car.

I have a VERY slow slow leak. A couple of drops maybe every couple of days.. Just wondering what this is effecting.

Do I NEED to get this repaired? If I did would this be an expensive fix? What happends if I let it leak? Anything bad?

 

Uh the fluid in the Diff is there for a reason, leaking = very bad. you need to get it filled back up to spec.

Were is it leaking from? The Drain plug?

 

I cant see exactly.. looks like coming from the top. From the other threads I read some kinda seal must be broken?

 

I have read about differential bushings going bad and leaking grease so it looks like oil. I cannot find the thread, but you might make sure that is not the problem before you do anything to the differential. Especially since it is coming from the top. Whiteleine and SPL sell replacement parts. There are also Nismo parts for the 350z, but I do not know if they will fit the G sedan.

Read the fourth post and see if it is similar to what you have:
http://www.350zmotoring.com/forums/3...wheel-hop.html

From the SPL web site:
http://splparts.com/store/product-info.php?pid37.html

 

There's 3 seals on the diff. 1 where the drive shaft goes into the diff, and 2 where the half shafts come out from the diff toward the hubs.

Check for wetness around these areas. It's actually not that hard to fix. You might be able to do it in-car but it would be a PITA.

She can leak a little bit, but you'll need to make sure to keep it topped off fairly often ( just like having a car with an oil leak ).

 

Would this be an expensive fix at a shop

 

replace your pumpkin... if that can fix it i think it would be the best bet.

 

Expensive?

 

well i think 3.5 and 3.7 only run a few hundred bucks. as long as you are out of powertrain warranty i would do this

 

Nah not really unless they do have to drop the diff, and even then it shouldn't be THAT bad.

You don't have to replace the diff unless it's physically damaged, and it sounds like you're either just leaking from somewhere else, or just one of those shaft seals as mentioned above. Unless there's a hole in the diff ( you'd pretty much notice this obviously ), you're leaking from some seal which costs $20 or less to do yourself.

Differentials are REALLY hard to hurt.

 

Yea i am almost positive its leaking from a seal. There is no way I broke the very top of the differential it would be most likely broken from the bottom. I know the part is cheap do you think labor on a differential will be pricey tho?

 

If they don't have to drop it, all they would do is disconnect the propellor shaft from the diff flange, pop the flange out, pull the seal out, hammer a new one back in, smack the flange back in, then reconnect the driveshaft. Top off fluids.

Probably an hour conservatively if the diff doesn't have to come down.

If it does have to drop ( probably only a little bit ), expect around 2 hours I'd say.

EDIT: Actually, if it's a front seal, the differential will need to come out most likely because taking the flange out of the front and replacing the seal involves shimming the pinion to meet the ring gear. That might take a few minutes...

 

My guess is its the upper pumpkin mount that's fluid filled. This seems to be a somewhat common failure. It's my understanding that there is no factory fix either. The pumpkin does have to dropped and the only real options are supermarket mounts or filling in the mount with liquid rubber.