Open Diffs
- Thread starter HB Chris
- Start date
What kind of goldmine have you stumbled upon there. What a cache of interesting and probably rare, differentials! 
I think the only answer is that someone needs to take them all.
The Collector in San Juan Capistrano, he has at least 50 BMWs
Drew, You know he will be keeping the rare stuff!
Lenoxx, I can put you in contact with him or Ryan who is coordinating the sale. Looking for a 3.64?
Lenoxx, I can put you in contact with him or Ryan who is coordinating the sale. Looking for a 3.64?
Thanks. I'm not sure yet what I'm looking for. To be honest, I don't know much about performance mods. But the price seems right and meeting new nearby contacts isn't a bad idea. I still need to scrape the mud from mine to see what I have.
Your 72 came with an open 3.64. You wouldn’t want a 3.07 with an overdrive trans. Euro coupes had a 3.45 as they had more HP, the US 2800CS also had a 3.45 but they are hard to find. If yours has a stamped or painted S it is limited slip. Ratio and stamp is on passenger side of diff on the flat boss beneath and just rearward of the half shaft. 40:11 is 3.64
Cool. I'll look for the stamp. I'm pretty sure it's an open diff. The wheels rotate opposite each other. But the driveshaft rotates if I rotate one wheel either clockwise or counter clockwise, I can't remember which. I think my diff needs oil and/or its shot. I suppose I should have checked/changed the oil before driving it, but I just couldn't help myself.
Reminds me of 02 salvage, that photo with all those diffs in a dumpster, still brings tears to my eyes.
Guys I do have a 3:45 lsd recently setup by the Gear Shop in Phoenix
Here is my 3.64. Look for this on the casing :Cool. I'll look for the stamp. I'm pretty sure it's an open diff. The wheels rotate opposite each other. But the driveshaft rotates if I rotate one wheel either clockwise or counter clockwise, I can't remember which. I think my diff needs oil and/or its shot. I suppose I should have checked/changed the oil before driving it, but I just couldn't help myself.
pm sent
What does the no. 3 mean?
No clue, some random casting number?
Mine has a "2" in that location (above the 11 / 40).
Thanks for the stamping location. Now I know where to look to see what LSD is in my car. About 3000 RPM was 80 MPH ,and 4000 RPM was 100MPH in 5th gear.
If it is an LSD it should also have an “S” near that “3”