Im looking to upgrade my auto FD from a 3.3 ratio to 3.9. However i need a manual transmission differential, preferably one that came from a low mileage car, with VLSD still working nicely.

can anyone help me source a clean one from ebay or anywhere? When i go on ebay they are around 350 to 500. And some of them look like sketchy vendors.

will a manual 370 diff work?

 

Reading the Z forums, I saw that it was confirmed that the 6MT housing (3.69) will bolt right up to the 7AT (3.35) without any modification but you need the whole pumpkin (Maybe some Flanges need to be swapped). I saw mention in the Z forum that the cross between Z and G doesn't work but I can't confirm as it doesn't go into much detail but I can't see why they wouldn't since it's the same FM platform...

The price you're seeing seems to be the going rate so not sure if you're going to get anything better. Just make sure it's the WHOLE unit and buy from a 99%+ seller.

 

if you are gutting it to go for bigger gears you are better off getting an aftermarket LSD and forget about a low mileage VLSD as the majority of the labour involved is in changing the gearing... and the aftermarket ones are much better ...finding a higher mileage one for cheaper will also offset the cost of the aftermarket unit...

if you are intent on getting a factory VLSD make sure to check for the "KG" stamp on the body of the Diff as a lot of ebay/salvage yard wreckers have inaccuarate listings...

 

Okay, did some reading up on this....

https://www.myg37.com/forums/engine-...-in-7at-6.html

Gears will not fit/work with the 7AT housing. You need to get the whole pumpkin. You can get any 09+ VLSD and just swap the 3-bolt flange. Or you can get a direct bolt on unit, like from the 08 5AT G. As Hashim mentioned, look for the KG stamp...

https://www.ebay.com/itm/2008-infini...4383.l4275.c10

^Should be a direct plug and play bolt on.

 

the ebay link you posted is for an auto diff. the 3.9 gears will not fit in there right? same with an 08 5AT G

is this a better buy? i cant see any KG stamp though.

https://www.ebay.com/itm/NISSAN-370Z...torefresh=true
(there is a giant hole in the cover)? idk about this one

https://www.ebay.com/itm/09-14-manua...1avZie&vxp=mtr
this one looks clean but expensive. and free shipping. all the other ones charge for shipping


yea i was looking to put in a quaife lsd in the future, but it is about $1250 more. im looking for better low end torque and acceleration right now so i just want 3.9 gears.

 

I get it, the cost on these things escalates so fast, just mentioned it cause the gear change is the bulk of the labour, which is the bulk of the cost on this

Chances are that you're gonna end up in that $500 range so maybe its not worth the trouble but in case you do find a high mileage unit for a lot less, you can get a used VLSD from Z1 for about 150 https://www.z1motorsports.com/rear-d...sd-p-8744.html

I would definitly keep an eye on ebay but I had much better luck with car-part.com and HollanderParts

 

would this be a good idea..
could i use this?
https://www.ebay.com/itm/Nissan-350Z...lZvFNZ&vxp=mtr

and then put in the used vlsd form z1?
https://www.z1motorsports.com/rear-d...sd-p-8744.html

 

Yeah that looks like it would work, you may have to change the front flange to match your drive shaft if its not the same for yours, but since your taking it all apart anyways you can always take it off your old one it can be set up properly

 

Yes, but that year was the only year the auto had 3.69 gears and the 3 bolt flange. Literally, plug and play. 3.90 gears will fit. Take a look through that thread I linked to....tells you everything you want to know.

 

I think thats true if you arent going for gears larger than 3.69 but if i recall correctly (and I very well may not be), for the 3.9/4.08 gears the ring gears are too big to fit in the auto's pumpkin...if you look closely the manual pumpkin "Bulges" out a little more at one point where the autos don't...

EDIT: I may not be right about this bulge thing (I'm feeling less confident about my recollection this as I think about it) but also if you use a pumpkin without a VLSD, (say an auto, because the yoke matches), the stub shafts wont be the same...on the VLSD one is shorter