To start off, i have a non vlsd g37 7AT (3.3)

I ALREADY CHECKED THE FORUMS and most were talking of 7AT converting differential to the 6MT. Ratios seem similar but still a different pumpkin. Why everyone is converting to 6MT instead of 5AT as it seems to be a simpler swap i have no clue.

I purchased the same year VLSD to get it to fit directly for 200$ shipped on ebay. Happy camper same ratio just LSD. however they told me the gears were bad so they were going to refund me. Out of no where it said shipped and I asked what happened they said we sent you a different differential, from a 2008 G37S coupe 5AT. So would this be a 3.692 differential? Is it a direct fit and will I still have cruise control? Would I need a speedo calibration?

Also does anyone know if this is against ebay rules? They didn't send the product i paid for.

I told them I don't want it but they already shipped it without asking me so i'm not sure what to do. I didnt want to mess with my gears but I guess i sorta have to. Donor car says RC36 on axle.

Help please! Thanks in advance to everyone but the person that's gonna say use the search bar

 

 

 

 

Yes the 08 LSD pumpkin is going to have 3.69 gears.

The AT's 6mt pumpkin doesn't matter unless you want to fit bigger gears in (Above 3.69 up to about 4.1ish). in which case the 6MT can accommodate the bigger gears.

The issues with going from different years and 6MT vs. AT is the pinion flange (Yoke). Its different on different iterations and for simplicity people try to stay the same. That being said the modifications required are covered on other threads with great pictures (They require swapping the flange and possibly cutting the centering pin as well as the associate resetting of the tension on the crush collar).

Sticking with an AT pumpkin won't necessarily solve this issue as the AT pumpkins without the LSD may have a different flange from AT pumpkins with LSD's even from the same year. The only way to tell is to visually inspect both yours and the doner. If you don't have AWD theres only 2 types so its not that hard to find a match.

If you have AWD you also can't change the gear ratio unless you change the front diff to match (i.e you cant use the 08 pumpkin). I'm assuming that you have a RWD so this is not an issue.

For RWD cars changing to a more aggressive ratio shouldn't cause issue with the speedo or the cruise control, but it will make the car more aggressive and change the RPMs you are at in a given gear/speed. usually people consider this and upgrade.

the bigger issue with a used LSD that you didn't ask for is that past about 60k miles the LSD stops functioning as an LSD anyways so its kind of a waste of time if you get a used high mileage LSD...

Anyways, good luck and let us know how you end up resolving the issue.

 

 

Glad to hear it got sorted out on the Ebay end and with a bonus to you!

I'm assuming they probably didn't want to bother paying for return shipping as its a large heavy item, either way the 3.69 gears will be a nice upgrade on top of the LSD.

Post up once you have it in so we can see your impressions. It might be a good time to replace the rear diff bushing when you do too.

 

 

I installed 5at 3.692 rear diff from a 08 g37s coupe into my 2011 g37s 7at sedan last Christmas. Went with white line bushings. Had a hell of a time cutting out the factory subframe bushing.

The 08 g37s differential required me to remove my axle stubs from my factory 3.3 rear end and installing them into the 3.69 rear end.

the reason is because the axle stubs on my 2011 g37s has threaded holes. The axles mount to the axle stubs by using multiple bolts that thread into the hole on the axle stub.

the 08 g37s coupe axle stubs did not have threads. I suspect the axles on that model were bolted to the axle stub using a bolt going through the hole and a nut on the other end to hold it in place.

swapping out the axle stub is easy. Pry bar and a hammer will easily remove the axle stubs. Just swap them.

My speedo works fine and is still accurate. Your car uses speed sensors mounted on the differential.

my car has intelligent cruise control and it no longer works when traveling speeds 67mph and higher.

I can set it to 65 and the cruise control will work fine. The moment I increase it to 67 mph it beeps at me and cruise control disengages. I hear a tune can fix this.

 

Good thing you were going from a LSD to a LSD, the stub axles are not the same size on the Open diff (on the LSD one is shorter) you can buy the shorter one separate but its expensive, if the Op's axle/stub axle bolts don't match you can also get the axle bolts from the 370z there is a post on another thread on here with the part numbers) which has the proper threaded bolts needed...and worst case scenario, you can get used rear axles for pretty cheap and just swap them too.

Interesting note about the ICC, must be due to the gear ratio change..I went from 3.69 open to 3.69 LSD and didn't have any problems with the ICC

 

 

here you go man: https://www.myg37.com/forums/d-i-y-i...-3-69-1-a.html its in the first post..probably want to browse the thread too

 

Wish I saw this thread sooner. Should have kept the 3.69 diff. The Vlsd isn't really worth anything. I've had both. The 3.69 diff bolts up fine however the easier way to install is order the axle bolts and nuts that came with the 08 diff. You can use them to install it direct without changing axle stubs.