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Car Forum / BMW Cars / May 2005

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E30 LSD 325is

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tado - 24 May 2005 21:34 GMT
Does a 1990 325is auto have a LSD or open? non convertable.
It is a 4.10 but not sure if LSD or not.

Somebody once posted a list of all years of E30 and the gearing and if LSD
or not.
Anybody still have that?
Somebody - 24 May 2005 23:37 GMT
> Does a 1990 325is auto have a LSD or open? non convertable.
> It is a 4.10 but not sure if LSD or not.
>
> Somebody once posted a list of all years of E30 and the gearing and if LSD
> or not.
> Anybody still have that?

Try e30@yahoogroups.com, they'll know.

Pretty sure your 325 isn't a 4.10 too, but I'm not an expert.  But most iS's
had LSD I believe.

Anyway ask in that group, that's where the experts hang out among other
places.

-Russ.
Matt O'Toole - 25 May 2005 03:54 GMT
>> Does a 1990 325is auto have a LSD or open? non convertable.
>> It is a 4.10 but not sure if LSD or not.
[quoted text clipped - 10 lines]
> Anyway ask in that group, that's where the experts hang out among
> other places.

Either version can have them, or not.  They were standard in some "is" cars, but
not all years.  Many non- "is" cars had them too.  The way to tell is to look
for an "S" on the diff case.  To get under there you probably have to jack up
the car anyway, in which case you can just turn one of the rear wheels.  If the
other one turns the same way instead of opposite, you have a LSD.

Matt O.
Rob Munach - 25 May 2005 11:50 GMT
>>>Does a 1990 325is auto have a LSD or open? non convertable.
>>>It is a 4.10 but not sure if LSD or not.
[quoted text clipped - 18 lines]
>
> Matt O.

Put the car in neutral, jack up one wheel. If you can turn it you do not
have LSD.

Signature

Rob Munach, PE
Excel Engineering
PO Box 1264
Carrboro, NC 27510

Somebody - 25 May 2005 12:58 GMT
> >>>Does a 1990 325is auto have a LSD or open? non convertable.
> >>>It is a 4.10 but not sure if LSD or not.
[quoted text clipped - 21 lines]
> Put the car in neutral, jack up one wheel. If you can turn it you do not
> have LSD.

Same question, out of interest, would that work if the LSD was viscous
instead of plates?

-Russ.
Rob Munach - 26 May 2005 19:06 GMT
>>>>>Does a 1990 325is auto have a LSD or open? non convertable.
>>>>>It is a 4.10 but not sure if LSD or not.
[quoted text clipped - 38 lines]
>
> -Russ.

If it was viscous (I don't know if BMW made a viscous unit), then you
would be able to rotate the wheel a few turns or so until the fluid
heated and locked up.

Signature

Rob Munach, PE
Excel Engineering
PO Box 1264
Carrboro, NC 27510

Somebody - 25 May 2005 12:54 GMT
> >> Does a 1990 325is auto have a LSD or open? non convertable.
> >> It is a 4.10 but not sure if LSD or not.
[quoted text clipped - 18 lines]
>
> Matt O.

Does the same vs opposite test doesn't work for viscous LSD's?  Not than a
iS would have one unless it had been swapped in of course.  For example to
get a 4.10 ratio from an iXA.

-Russ.
Randy W - 26 May 2005 05:43 GMT
>Does a 1990 325is auto have a LSD or open? non convertable.
>It is a 4.10 but not sure if LSD or not.
>
>Somebody once posted a list of all years of E30 and the gearing and if LSD
>or not.
>Anybody still have that?

The 89 and 90 automatic 325is came with a 4.10 LSD.  The 87 and 88
325is automatic had the 3.73 as did all the 5-speeds.

Randy
89 325is
http://home.earthlink.net/~randylwalters/
 
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