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 6.3
 My 1971 300SEL 6.3
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Art Love

Australia
6226 Posts

Posted - 03/04/2012 :  03:07:39  Show Profile  Reply with Quote
Eugene,
Have you got the VIN of the parts car? If it is a later car, then the backing plates should suit your new rotors. The main advantage of changing over the axle, particularly if the one on the car is not original, is that you can recondition the replacement axle components off the car and then swap the whole thing. Depends a bit on what you know about the condition of the two diffs etc.
Art
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Ron B

Australia
11612 Posts

Posted - 03/04/2012 :  04:13:17  Show Profile  Visit Ron B's Homepage  Reply with Quote
The diff has a machined pad on the side opposite the centre pivot . there will be a 4 digit number,this is the serial number of the diff and is roughly close to the car it came from originally . The next is three digit number which should be 2,87 or 2/87-1 .This is the ratio . Anything else such as 3,27 or 3.28 or 4,11 etc means it is for a 3.0 liter or 3.5 and 4.5 V8 car.

quote:
12-14-2004, 11:49 PM #8
Tom Hanson
MBCA Member

What the heck, try to stuff a MB 6.9 liter V8 in it. What a machine that would be..
__________________
Tom Hanson
Orange County Section
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Ron B

Australia
11612 Posts

Posted - 03/04/2012 :  04:18:28  Show Profile  Visit Ron B's Homepage  Reply with Quote
I notice your other axle is LSD too.


quote:
12-14-2004, 11:49 PM #8
Tom Hanson
MBCA Member

What the heck, try to stuff a MB 6.9 liter V8 in it. What a machine that would be..
__________________
Tom Hanson
Orange County Section
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EugeneGroysman

USA
120 Posts

Posted - 03/04/2012 :  10:01:35  Show Profile  Reply with Quote
Parts car vin: 10901812002061.
The axles are absolutely the same.

1971 6.3
2011 S550 4matic
2011 ML350
1997 Porsche 993 C4S 'Kills bugs fast'.
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Art Love

Australia
6226 Posts

Posted - 03/04/2012 :  18:48:01  Show Profile  Reply with Quote
Then both "axles" are from before the rear disc (rotor) change at #3548/9 which is why the correct later rotors don't fit. Do what Ron suggested and check the serial number on the diff. Maybe just the brake backing plates etc were changed and you have the original diff on the car. If you have, there is virtue in keeping it.
Art
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mpmorris

USA
1359 Posts

Posted - 03/06/2012 :  11:23:44  Show Profile  Visit mpmorris's Homepage  Reply with Quote
I'm not sure if this is relevant as I haven't read this thread thoroughly -just the tail -but I did convert 005081 to the early vented discs which only required the brake pipes, calipers, backing plates and rotors from an early car --don't recall but the pipes may have been the same. It was a nut and bolt exchange with no modification to the axles or housing tubes.

M.
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EugeneGroysman

USA
120 Posts

Posted - 03/20/2012 :  14:53:09  Show Profile  Reply with Quote
I am preparing a bunch of parts to send to a shop for zinc plating.
Can I still use the following parts or replace them?







1971 6.3
2011 S550 4matic
2011 ML350
1997 Porsche 993 C4S 'Kills bugs fast'.

Edited by - EugeneGroysman on 03/20/2012 14:54:06
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Ron B

Australia
11612 Posts

Posted - 03/20/2012 :  17:46:24  Show Profile  Visit Ron B's Homepage  Reply with Quote
Nien ,Ist kaput..
Thats a common problem on our cars as they get older and the cones rust out. The rubber bags rub the coating off and it gets corroded when the cars dont get driven much.

quote:
12-14-2004, 11:49 PM #8
Tom Hanson
MBCA Member

What the heck, try to stuff a MB 6.9 liter V8 in it. What a machine that would be..
__________________
Tom Hanson
Orange County Section
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EugeneGroysman

USA
120 Posts

Posted - 05/25/2012 :  01:00:34  Show Profile  Reply with Quote
The weather just doesn't cooperate. We get rain every other day. Here is some update:
I tried to use sandblaster to clean underneeth the car, very poor result. Its gets cloged a lot, weak performance. I guest, I got what I paid for.






Tryout on muffler.






It took me two days to clean this.






Ready to paint with anti-rust solution.



I am planning to do two coats this week.

1971 6.3
2011 S550 4matic
2011 ML350
1997 Porsche 993 C4S 'Kills bugs fast'.
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olliw109

Germany
385 Posts

Posted - 05/28/2012 :  16:07:04  Show Profile  Reply with Quote
Dear audience,
I had no problems interchanging overhauled back axle of 3478 into 5327 (besides changing brakes, plates etc.). I didnt care because I didnt know that the axles are different(early and later).....the early one fitted (and serves co far) quite well but car is not yet on the street. Anything I did (or understood) totally wrong?
Enclosed 5327 freshly styled...





300 SEL 6.3 3478+5327
Oliver
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Art Love

Australia
6226 Posts

Posted - 05/28/2012 :  18:00:01  Show Profile  Reply with Quote
I can't get Eugene's pictures to show - just little red x's.

Oliver, no one except the mechanic is going to know if you don't tell them.
Art
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EugeneGroysman

USA
120 Posts

Posted - 05/28/2012 :  23:17:00  Show Profile  Reply with Quote



















1971 6.3
2011 S550 4matic
2011 ML350
1997 Porsche 993 C4S 'Kills bugs fast'.
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Art Love

Australia
6226 Posts

Posted - 05/29/2012 :  03:27:47  Show Profile  Reply with Quote
I don't envy you. That is a dreadful job. Lying on your back with everything you scrape off falling in your face. It sounds as if you are past the worst of it. My sympathies.
Art
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olliw109

Germany
385 Posts

Posted - 05/30/2012 :  07:19:36  Show Profile  Reply with Quote
Hello Art;
I am afraid I do not understand what you mean.
Would you be so kind and give me a link/source where I can find out more about the differences of the axles? When and how changed? Matter has probably been mentioned often but I cannot find it using the search option....
Your advice is highly appreciated.

300 SEL 6.3 3478+5327
Oliver
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Art Love

Australia
6226 Posts

Posted - 05/31/2012 :  04:24:45  Show Profile  Reply with Quote
Oliver,
I meant that unless you crawl under the car or work on it, you would not know that the rear end is the early or late version. They changed from ventillated to solid rear brake discs from Chassis #3549. The axles themselves are the same. The discs and the backing plates are different. The calipers are the same. They also changed the diff ratio at the same time from 1:2.85 to 1:2.28. (Before #1202, the ratio was 1:2.82 with the exception of #1194 which had 1:2.85 as well.) They dropped the rear brake pressure regulator at the same time (#3549). Someone else may know if anything else was changed. Lots of rear axles have been swapped over the years rather than rebuild the differential. I'm not aware of any adverse effects other than to originality.
Art
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