Differential

[beaver50]

How can you tell if you have a 2 series or 3 series differentils?

[Injuneer]

If it's an ABS-only rear, the 2 series has a narrow reluctor gear, and the 3 series has a wide reluctor gear.

http://www.tacreationsusa.com/images/Gauges/dsc02810.jpg

[DirtyBird1139]

I believe 3.0x gears and up are 3 series, anything below is 2 series. Also 3 series ring gear is not as thick as 2 series.

[Injuneer]

That's (almost) all true if the car has remained unmolested since it left the factory. But after 22 years someone could have installed 3 series gears in a 2 series carrier by either using a spacer for the ring gear, or available thicker 3 series ratio ring gear that is made to fit in a 2 series carrier. The 2 series goes up to 3.08:1.

[Catmaigne]

That is true for the 7.5 10 bolt. The 8.5 10 bolt is 2.93 and up for series 3 if I remember correctly.

[Injuneer]

Pretty sure he's asking about a 7.5/7.625 10-bolt.

[DirtyBird1139]

Go on google and type in 7.5 2 vs 3 series and go to images, first few pics are comparision pics

[DirtyBird1139]

Injuneer, where in nj are you, live in nj also

[Injuneer]

Injuneer, where in nj are you, live in nj also

East Brunswick

[DirtyBird1139]

Millstone for me