3.73 stock to 4.1 LSD

[PuebloPete]

Hello all, was wondering if anyone new if there was anything I had to change to swap out my 3.73 diff (325iC E30) with a 4.1 LSD since the original is not a limited slip. Also wondering if the E30 M3 diff is compatible? Thanks

[asubimmer]

me wants the 4.10lsd

[PeaveyBassist]

e30 m3 4.10lsd diff fits. Also, 325is with auto transmissions had 4.10 diffs. If its from an auto, make sure its an LSD and not an open.

Will

[PuebloPete]

Thank you... Me not tell you where to get 4.1 LSD... :rofl: I'm not a selfish person. Ebay has one right now. I'm pondering on the M3 one, if I don't go through with that one I'll let you know. They want $400.

[dableds]

For LSD`s you need to look in places where people are selling used car`s details... or details from crashed cars

You need to search 325iX rear diff...

Here in Latvia, diff costs ~80Eur

[PuebloPete]

Would anyone know how much a used 4.10 LSD is worth? Saw one for $400 and $450.. If I do buy one used would you recommend changing anything before install? Thanks.

[Jon '92 325ic]

For a used 4.10 LSD, I wouldn't pay more than $450. That's how much Joel at EuroDepot sells them for and his come sandblasted, painted and a 30-day warranty. He's a reputable seller (I just bought a 3.91 from him) and there having a "make your best offer sale" currently, but it's not clear from their website if that includes 4.10LSDs. There's a guy on this forum (WSTC1) that sells them when he's got them. He's a reputable seller as well. But you can find some occassionally on eBay for less. One recently went for $350. Shipping will run at least $70 usually, so if you can find one local, you'll save at least $70.

[PuebloPete]

Thanks for tip, you've been a great help guys..