IX rear diff

[Zreberlcoe]

Will a 1991 IX rear diff fit in a 1991 325i? Im looking to get an LSD and there's one out of a 1991 325ix but I'm not sure it's the same.

[nomansland92]

The ix diffs have a vc in them, I believe they lock at 90% unlike the rwd ones. iirc it will still bolt up and work fine.

[Zreberlcoe]

The ix diffs have a vc in them, I believe they lock at 90% unlike the rwd ones. iirc it will still bolt up and work fine.

So what does that mean, 90% locking?

[nomansland92]

Pretty much just means that one wheel will spin 10% of a rotation before it looks in. Most LSD diffs are around 40-50% So it will go better in the snow but it can make you car a little more tail happy.

[Zreberlcoe]

Pretty much just means that one wheel will spin 10% of a rotation before it looks in. Most LSD diffs are around 40-50% So it will go better in the snow but it can make you car a little more tail happy.

Better for drifting😏

[Zreberlcoe]

So I bought the diff and subframe since it only has 53k on it.

Now from what I can tell the sucker can bolt right up so that's good. I'm going to put poly bushings in it from Ireland engineering as well:) But here's my question, in the future, when I can afford it, I'm going to put in Ground Control Coilovers so should I put in camber adjustments now or then?

[Ether-D]

Do the camber corrects now if it's feasible, just to save some work.

I have a ix 4.10 rear diff in my cabby and its not really that tail happy (I believe it has some wear on it though).

[Zreberlcoe]

Do the camber corrects now if it's feasible, just to save some work.

I have a ix 4.10 rear diff in my cabby and its not really that tail happy (I believe it has some wear on it though).

Will I be cambered too much on stock ride height and risk killing tires?

[nando]

the VC won't survive long for drifting.. you'd be better off with a clutch type LSD built for that purpose.

if it's just a DD or used for autox/HPDEs it'll be fine though.

[Zreberlcoe]

the VC won't survive long for drifting.. you'd be better off with a clutch type LSD built for that purpose.

It was a joke. I'm going to track and auto-x this car, no drift. The body is too clean.

[nando]

heh, ninja quote.. see my updated post :p

when it works it works well. at 51k miles it should be like new. Mine isn't totally dead but I can tell it's not 100% anymore (~260k).. it just doesn't rotate like it should anymore, and I can feel the loss of traction in the rear especially on the inside corner. but that's after years of hard use!

[Zreberlcoe]

heh, ninja quote.. see my updated post :p

Ninja is right. I also bought it because snow is coming here in colorado and it is my DD so I want to prepare the car for snow usage as well as I can.

[Wanganstyle]

Ninja is right. I also bought it because snow is coming here in colorado and it is my DD so I want to prepare the car for snow usage as well as I can.

if your car already has an original LSD unit it will be a clutch type unit and honestly better for all purposes than the Viscous unit.

the viscous unit is really weak compared to the bmw clutch type unit; the Xi model e30's don't need as aggressive a rear LSD as they have..... all wheel drive!

viscous LSD units are common in lower Subaru AWD models as well; STi models have Gear type rear LSD or Clutch type for ultimate performance.

[Zreberlcoe]

if your car already has an original LSD unit it will be a clutch type unit and honestly better for all purposes than the Viscous unit.

the viscous unit is really weak compared to the bmw clutch type unit; the Xi model e30's don't need as aggressive a rear LSD as they have..... all wheel drive!

viscous LSD units are common in lower Subaru AWD models as well; STi models have Gear type rear LSD or Clutch type for ultimate performance.

I have a 325i so anything is better than the one tire fire.

[Wanganstyle]

I have a 325i so anything is better than the one tire fire.

plenty of 325i's and 325e's have LSD units equipped OEM.
plenty of 325is's have OPEN diffs from BMW - the one I race did.

before you take the car apart check for LSD?