325ix diff swap???

[4x4_e30]

I'm rocking 4.10s and a 5 speed, too. I think the biggest driving difference with gear ratios is how short 1st gear gets, in our case it makes for some awesome 6k rpm clutch dumps

[E30rider]

Not much difference (4.8%). People love to exaggerate the revs at freeway speeds - 75 is about 3500. Not bad at all, and no need to downshift since you're already in the meat of the torque curve.

Thanks Nando, I appreciate it! I'm going to do the swap soon and hopefully all goes well :) I was just worried because the guy I bought the swap set up from was being an asshole and didn't want to give me the manual diffs .. So let's see how this goes !

[nando]

Not much difference (4.8%). People love to exaggerate the revs at freeway speeds - 75 is about 3500. Not bad at all, and no need to downshift since you're already in the meat of the torque curve.

[stonea]

Nah, my car is an 88' so it came factory with a 5 speed and the 3.91 diffs. I know Mr. ix himself (Nando) has 4.10 diffs in his 5 speed swapped car.

[E30rider]

You'll be fine using the 4.10 diffs. I've always wondered how big of a difference there was when driving a 5 speed car with a 3.91 ratio vs a 4.10.

Thanks! Have you driven it with the automatic diff before ?

[stonea]

You'll be fine using the 4.10 diffs. I've always wondered how big of a difference there was when driving a 5 speed car with a 3.91 ratio vs a 4.10.

[E30rider]

Doing a swap on my Bmw e30 325ix. I have everything but the diffs. Does anyone know if I can use the automatic ones (4.10 ratio) with manual trans, I think the manual ones for 325ix are (3.91). I keep hearing different things from different people. Let me know please :) much appreciated