I am about to pick up a used diff tomorrow for pretty cheap however I wanted to know how are you able to tell the difference between it being an open or VLSD without pulling the cover? Do I just turn one of output shaft and if the other turns the same direction then it has VLSD, or do I turn the main shaft and see if both output shafts turn the same direction? Also is there any visual differences between the output flanges?

Last question, for the 6sp differentials, the input shaft is 4 bolt flange vs an automatic is 3 bolts flange correct?

 

both have a 4 bolt flange, pull a stud shaft to see if it is an open or Vopen diff, both are crap.

 

Thanks, so once I pull out the shaft, what exactly am I looking for to tell the difference?

 

dont take the time to pull the stud shaft.
-try to find the car it came from
-sping on side and see what the other side does
-look for the stamp code on the differential (G/C/B etc...)

 

The guy is telling me it came off a 04 6sp G35 but doesn't have the car anymore so theres no real way to verify. So if both axle stubs spin the same way then it should be VLSD and does it matter if I spin the stud shaft instead or should I spin it from the axle? What should the stamp coding be for the VLSD?

 

all 6spd G35s come with VLSD. spin both, the front and one side. both sides should spin in the same direction. The codes I cant remember off hand, but go to g35driver and do a search.