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  #141  
Old 11-08-2012, 07:45 AM
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Bentley manual says our 5 speed transmissions through 9/2003 are (S5D 280Z) made by manufacturer ID (ZF type C), page 230-1.
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  #142  
Old 11-08-2012, 11:05 AM
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Quote:
Originally Posted by JCL View Post
Have you removed the Clutch Delay Valve (CDV)? I found it made a big difference in several of my manual transmission BMWs (except the 535i). I didn't have a manual X5, so not sure there.
my CDV was replaced with a Zeckhausen unit before I bought the car, so I can't attest to how it drove without it. However, my clutch engagement is smooth as can be, which is not always what I hear about people who have still has the CDV.

For 40 bucks if the clutch engages smoother its worth it in my opinion. Located on the hard clutch line going into the slave cylinder if i'm not mistaken.
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  #143  
Old 11-08-2012, 05:04 PM
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The rear drivetrain is designed to deal wtih approximately 60% of the vehicle's power, on a continuous basis. The rest goes to the front drivetrain. So if you were RWD only, you would be beyond the design intent, and if you modify for more power, even further off. Expect to break things.
Does anyone know how much of the Special Lemans Edition X5 was modified, in particular the the drive train from the output shaft of the transmission to the rear diff? How much was stock?
My guess is that it was rear wheel drive, but I did see a vid that looked like all 4 were breaking loose! Maybe a front end push?

What are the hypothetical/engineering limit on the e53's for power/torque handling capacity, before it fails? Was it just the suspension capabilities paired with an engineering feat of stuffing an intoxicating V-12, they were showing off. If so, why did they neuter the AWD? Too complicated even for the German's with all kinds of parts laying around?
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  #144  
Old 11-08-2012, 06:31 PM
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Nobody knows, unless they have seen the car. BMW didn't talk about it much. It was a publicity exercise, not a race car. This is all water cooler talk.

Four wheel drifts existed for years before awd came along. Doesn't depend on whether the vehicle is rwd or awd.

Obvious plan would be to upgrade the rear diff to one used in a higher hp model. Same with the transmission.

I believe the awd would have been left off because the V12 has an oil sump where the E53 has a front diff. It would have been difficult to put two components in the same space, unless they had a V12 sitting around that had been modified for awd use. And even then, you would need to find room for a transfer case. I don't believe the transfer case is rated for anywhere near the power they were developing, whereas they do have transmissions and differentials that are designed for higher power levels than the E53 had stock.
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  #145  
Old 11-09-2012, 02:25 AM
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Bentley manual says our 5 speed transmissions through 9/2003 are (S5D 280Z) made by manufacturer ID (ZF type C), page 230-1.
Thanks Mate.
Trying to find out if its a single rail, so I can fix the neutral locator. I t likes to go over to 5th when its cold, instead of sitting between 3rd and 4th.
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  #146  
Old 11-09-2012, 01:57 PM
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I guess I can be added to that list.

E30Jason (GA, 2004)

This is the 2004 6-speed I bought for the wife. She rarely lets me drive it now. So I am stuck with my wagon. Poor me.



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  #147  
Old 11-09-2012, 02:28 PM
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Originally Posted by Benvette View Post
Thanks Mate.
Trying to find out if its a single rail, so I can fix the neutral locator. I t likes to go over to 5th when its cold, instead of sitting between 3rd and 4th.
Hmmm... I suppose that's the problem with mine; it almost always likes to bump over to 5th, hot or cold. I was hoping it might just be something with the linkage, but didn't seem likely. Once in a while it'll come to rest between 3rd & 4th, but once you push it over to 5th, that's it until the next time it decides to play nice. I suppose that's an internal problem with the transmission?
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  #148  
Old 11-09-2012, 07:54 PM
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I suppose that's an internal problem with the transmission?
Its not that hard to fix. The worst part is pulling the centre console apart to get to the top of the box.

Nice ride E30Jason!
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  #149  
Old 11-09-2012, 08:13 PM
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E30Jason,
Ah, I am envious on your 6 speed! Nice car, color and those 87s are titz.
GL, mD
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  #150  
Old 11-10-2012, 03:41 AM
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Originally Posted by Benvette View Post
Its not that hard to fix. The worst part is pulling the centre console apart to get to the top of the box.
Seriously? The trans doesn't even have to come out to fix that? Seems like most other BMWs, there's zero access to the trans from the top. I had to rebuild the linkage on my e28 when I first got it, and had to pull the exhaust and driveshaft for that.

If you could provide a link for more info on that fix, I'd be forever grateful!
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