E60 Discussion Anything and everything to do with the E60 5 Series. All are welcome!

POSI-REAR OR NOT

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Old 09-25-2005 | 10:37 AM
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I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ??? I really don't know.
Old 09-25-2005 | 11:32 AM
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Originally Posted by Mr 5er' date='Sep 25 2005, 11:37 AM
I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ???? ? I really don't know.
[snapback]174769[/snapback]
From what I understand, the only the M Cars come with Posi from the Factory. I would think the new M5 would have posi. Yours most likely does not.

Of course, there are two ways to check. Turn off all traction controlling devices and dump the clutch or power brake an auto or lift the rear of the car, both sides, put in neutral and spin one rear tire. If they both spin in the same direction, you have posi. If they spin in opposite directions, you don't.

I prefer the burnout method, more fun. Though I haven't done this with the 545 yet.

On another note, does anyone know if aftermarket Posi is available and would it mess up the traction control system?
Old 09-25-2005 | 12:06 PM
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Originally Posted by Mr 5er' date='Sep 25 2005, 06:37 PM
I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ???? ? I really don't know.
[snapback]174769[/snapback]
What the flip is a posi-rear?
Is it something like this.....

HoochieM.mpe

...for posing.
Old 09-25-2005 | 12:58 PM
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Originally Posted by IrishEyes' date='Sep 25 2005, 03:06 PM
[quote name='Mr 5er' date='Sep 25 2005, 06:37 PM']I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ???? ? I really don't know.
[snapback]174769[/snapback]
What the flip is a posi-rear?
Is it something like this.....

Attachment 10761

...for posing.
[snapback]174786[/snapback]
[/quote]


Best guess is posi-rear = Limited slip diff.

Only the M5 has a LSD in the E60 model range.
Old 09-25-2005 | 01:33 PM
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Originally Posted by IrishEyes' date='Sep 25 2005, 12:06 PM
Is it something like this.....
[snapback]174786[/snapback]

If its somthing like that I dont wnat it.
Old 09-25-2005 | 02:00 PM
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Originally Posted by Mr 5er' date='Sep 25 2005, 12:37 PM
I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ???? ? I really don't know.
[snapback]174769[/snapback]
You have DSC (dynamic stability control) and DTC (dynamic traction control). Check out these topics in your manual; it is good to know something about them.
Old 09-25-2005 | 04:44 PM
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Thanks guys for all your answers, I guess I'm showing my age when I said Posi-rear. I remember the days when I had a 1968 Plymouth Roadrunner with a 426 Hemi engine and a 411 Posi rear, by the way To Mr. Irish Eyes, Laddie ....THAT WAS ONE BIG OLD POSI REAR HIP HOPING DOWN THE STREET....................LOL Thanks for making me laugh!!!

I love this board.....
Old 09-25-2005 | 05:36 PM
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Originally Posted by IrishEyes' date='Sep 25 2005, 02:06 PM
[quote name='Mr 5er' date='Sep 25 2005, 06:37 PM']I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ???? ? I really don't know.
[snapback]174769[/snapback]
What the flip is a posi-rear?
Is it something like this.....

Attachment 10761

...for posing.
[snapback]174786[/snapback]
[/quote]
Old 09-25-2005 | 06:15 PM
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Originally Posted by alpineweiss' date='Sep 25 2005, 02:58 PM
[quote name='IrishEyes' date='Sep 25 2005, 03:06 PM'][quote name='Mr 5er' date='Sep 25 2005, 06:37 PM']I have a simple question for the group. Does my 05 525i have a posi rear or is it a single wheel drive ???? ? I really don't know.
[snapback]174769[/snapback]
What the flip is a posi-rear?
Is it something like this.....

Attachment 10761

...for posing.
[snapback]174786[/snapback]
[/quote]


Best guess is posi-rear = Limited slip diff.

Only the M5 has a LSD in the E60 model range.
[snapback]174796[/snapback]
[/quote]
Positraction and LSD were about the same in the good old days, but no more. Check the excellent, as far as I know, explanation of LSD on this thread:

What 5 Series changes would you like to see?

And, note that LSD is not what it used to be. ~0{:^)
Old 09-25-2005 | 06:26 PM
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Arrrrrgh!
Here I go again
Even the 545i doesn't have LSD! This is a definite

It is the ONLY thing that may prevent me from getting another E60
unless I pony up the $$ for the almighty M5.



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