the first one here is a 3.91 from an 5spd ix. It has 137K on it. It is a viscous type differential, which is what is found on all ix e30's. It locks up the same but there is a very minimal delay in lockup, I believe this is to protect the awd system. Most people would not feel a difference. The 3.91 ratio is nice to have. This has no leaks and spins very well.
3.73 LSD is SOLD
Pickup: 225
ship: West +50
East +80
middle +70
this image is of the 3.91 ix diff
3.73 LSD is SOLD
Pickup: 225
ship: West +50
East +80
middle +70
this image is of the 3.91 ix diff

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