I just bought an 03 g35 sedan 5AT. I've learned that it has the 3.3 open diff. Do they sell a lower gear ratio for the open differentials? Preferrably a 4.08 ratio? Or would I have to change my whole diff case out for the LSD case to do a ring and pinion upgrade. Please someone help because this 3.3 ratio is a turtle from a hole shot

 

You can find lower gears online but it would cost you a lot for them along with the price of installation. I found a used pumpkin with the 3.69 gear VLSD for $450 and installed it myself. I have an earlier post in this thread with the website....good luck!

 

well I know how to do all of that myself I work for a shop and I have a mustang as a racecar which I built myself from ground up, so the labor is the easy part, I was just curious as to where I can find ring and pinion for my open diff without swapping the entire pumpkin. I really appreciate all the help.

 

Ok guys I don't work for this place...I'm just another guy with a G35 (03 auto w/08 3.7vlsd swap) so I'm posting this again to help everyone else out. My diff which is technically called the "carrier assembly" was only $450 shipped...Yours might be a little more or less...just check the site!

And if you do get a newer diff you might have to switch out your oil seal....this is the metal disc at the bottom of the flange.... depending on what year you got. Also, somebody asked about this....I personally lifted the car and placed it on jack stands.....the diff assembly weighs about 90lbs though so it's a B***H to install under that car height but possible. Try to borrow an impact wrench if possible. That was the only way I was able to remove the pinion nut. There are other tips in this thread. I know cuz I asked a LOT of questions....So thanks to everyone who helped me out!!!!

 

In that case you can checkout http://mynismo.com

 

ok I'll check it out, thanks a lot

 

No problem...Hope you can find what you need

 

Thanks for sharing your method for supporting the car while underneath it. I plan to use a floor jack to lower/lift the carrier assemblies while the car is supported by jack stands. I've already got a 1/2" air impact wrench, so should be good to go there.

Now if I could just find the time to tackle this.

 

yeah that's what I had to do....I also learned in the process that the floor jacks with the lifting plate that's about 2" wide is useless in the carrier lifting process...i ended up having to roll in on my creeper head first and then use every muscle I had to push the rear end of the diff up first to get that long rear bolt in...from there I managed to push it back and up so I could get the 2 long bolts back in (one each side through the bushing area). From there the rest was easy enough.....My tip on switching the oil seals beneath the flange....stick a very thin screw driver between the plate and the diff flange....then just tap and work your way around until it comes off...have to do this for both diffs to complete the switch....I also had to slightly grind the old flange in-order for the new oil seal to fit....you will see what I mean....it just kinda has a few slightly raised areas which kept on the old oil seal

 

I just picked up my 08 3.7/VLSD diff for $350 shipped. The site lists a couple are available on east and west coast.

The site is car-parts.com search: 08 G35 Sedan
Part: Carrier (see differential)
Location: Northeast, pacific or where ever you like in the drop down.
Your zipcode

Next page pick either AT or MT locking. There are more AT than MT diffs.

Question does the G37 vert come with 3.9 gears stock? I searched for a G37 diff and it had the vert with 3.9 gears.

I'll post a review after I install mine with a aluminum driveshaft.

Good luck with your search.

 

Nissan\Infiniti usually puts a higher ratio in the heavier version of cars. X (AWD), Convertibles, and wagons usually have a slightly higher ratio than the base sedan or coupe.

 

I have an 04 G35 coupe AT. It has the 3.3 FD. I'm going to buy a 3.69 (Entire Pumpkin) My question is does it matter if I buy the 3.69 MT or AT? Will one be a direct swap, or less work than the other? I want to order this so bad, but just need to clear up this question. Does it matter if one has VLSD and the Other doesn't? Thanks

 

Make sure the flange on the one you buy has 4 bolt holes in the front, usually its associated with the manual transmissions. That way it will bolt up directly and no modification required. A VLSD would be better then an open diff.

 

Does anyone know what FD does an automatic 2007 g35 type S have? And would the automatic differential fit my 2005 g35 coupe 6MT?

And does anyone know a listing of which model carries 3.69FD from g35 to g37 or 370z. Please help!

 

Please read the OP boss. he used a 5AT 07 g35s differential...the exact yr and model you're asking about. It has the 3.7 FD. and both automatic as well as manual differentials will fit, in the case of that particular model, it had to be modified as shown in the OP to fit. In summary, yes it will fit but it may take a LITTLE bit of work to do it.