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Old 03-03-2010, 06:49 PM   #61
Dr. Flyview
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Quote:
Originally Posted by Mystikal View Post
Sorry, the tire on the other side will spin the opposite direction.
Jay, I don't get it. Do you spin one wheel by hand and then see the direction the other spins in? I know on the bimmer when you spin one wheel by hand the other doesn't even move (open). Never seen it go backwards.
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Old 03-03-2010, 07:47 PM   #62
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thats what this website says too..
http://www.car-videos.net/whatis/differential.asp
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Old 03-04-2010, 09:07 AM   #63
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It should definitely go backwards. Never seen one not do it, maybe there is damage.
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Old 03-04-2010, 10:00 AM   #64
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Yeah, typically, open diff, wheels go in opposite direction. LSD, same direction, depending on lockup and condition of the diff. You can also check it by lifting only 1 rear, and trying to turn it. Open diff, it will turn pretty easily ... LSD, you'll need about 30 ft-lbs or more to turn it.
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Old 04-22-2010, 04:03 AM   #65
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so my 93 has an open 3.15.. how about my 92 325IS.. thats automatic..
when i jacked up the car from the rear.. i put it on drive and both wheels spinned in the air..
i tried goin under the car to see if theres an S but it was too greasy so couldnt actulaly see.
anyone wants to guess whats thhe ratio on it..
keep in mind its an AUTO car!
one of the tires was poped.. and u can clearly tell its from burnouts.. so its most likely one
thank you
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Old 04-22-2010, 12:42 PM   #66
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Quote:
Originally Posted by mhamouda View Post
so my 93 has an open 3.15.. how about my 92 325IS.. thats automatic..
when i jacked up the car from the rear.. i put it on drive and both wheels spinned in the air..
i tried goin under the car to see if theres an S but it was too greasy so couldnt actulaly see.
anyone wants to guess whats thhe ratio on it..
keep in mind its an AUTO car!
one of the tires was poped.. and u can clearly tell its from burnouts.. so its most likely one
thank you
If you put the car in the air and put it in drive generally both tires will spin in the same direction. As stated before if you want to check put the car in park and try to spin one wheel, if the other wheel spins in the opposite direction then you have an open diff, if you can't spin the wheel without a lot of effort it's probably LSD (or your brakes drag a lot haha)
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Old 04-22-2010, 12:50 PM   #67
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where do you see the ratio usually?
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Old 04-22-2010, 05:07 PM   #68
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It's on a tag, but with the rust on most E36s now the tag is useless. It's really easy to tell once you work backwards from the tach RPM.
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Old 04-22-2010, 05:24 PM   #69
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Originally Posted by mhamouda View Post
where do you see the ratio usually?
On a stamp on the upper right of the back of your diff.

You can also determin it by counting the driveshaft turns in comparison the % of drive wheel turned.

I happen to know your car came with a 3:91 ratio diff (all 323-328auto's did)
Therfore if you were to mark a line on your driveshaft and another on your drive tire, then turn the drive shaft 3 X's you'll see that the drive tire has moved 91% of the distence to make one full revolution.

As for jack up one wheel BS none of it is consistent on my car.
Some times they both turn the same way, sometimes oposite directions, and sometimes just one wheel turns, never did try with one tire on the ground so maybe that one is good and I know I do have a LSD.
From what I understand the clutchpack is supposed to behave like a open diff untill TQ from the imput shaft engages the clutchpack to turn on the LSD sort of speak, explains why you can get away with street driving a 100% lockup diff if the driver knows what's back their. Unlike the old days when they would just weld the axles together and (hopefuly) not drive it in the rain.

I generaly only trust the same test e36.M52B25 did in his last post.
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Old 04-22-2010, 05:45 PM   #70
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I generaly only trust the same test e36.M52B25 did in his last post.
haha
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Old 04-30-2010, 01:01 AM   #71
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hey, im just wondering, what do i got stock? on my 96 328is.
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Old 04-30-2010, 07:06 AM   #72
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The wheel will go backwards if the car is in gear.
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Old 04-30-2010, 05:37 PM   #73
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hey, im just wondering, what do i got stock? on my 96 328is.
Most likely a 2.93 open. Some very early cars had LSDs, but it's rare.
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