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PointedThree :  Sedan Forums : W126 S,SE,SEC,SEL,SD,SDL Class : Transmission lifespan - 300SD?

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Transmission lifespan - 300SD?
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Posted 1/28/2009 6:31 PM
Woody
Extreme Veteran




Date registered: Feb 2007
Location: Bend, Ore.
Vehicle(s): '84 280GE -> 300GD turbo, '84 300SD veg, 06 Navion
Posts: 570
500
Transmission lifespan - 300SD?

What's the most one can expect from a 300SD transmission, assuming of course, all proper and timely maintenance was done?

A mechanic just told me 200k - to 250k tops. Hoping personal experiences are better...

Thanks.
#142101
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Author
Posted 2/2/2009 9:23 PM
Woody
Extreme Veteran




Date registered: Feb 2007
Location: Bend, Ore.
Vehicle(s): '84 280GE -> 300GD turbo, '84 300SD veg, 06 Navion
Posts: 570
500
RE: Transmission lifespan - 300SD?

Geez, thanks for nuthin'!

Bought it anyway. I have a parts car, so what's the big deal, right?

Hello?

















Yeah, I'm talkin' to you!
#142653 - in reply to #142101
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Posted 4/2/2009 2:52 PM
Ed Mclass
Expert




Date registered: Apr 2006
Location: Nashville, Tennessee
Vehicle(s): 1958 180a, 2010 GLK, 2000 G 500, 2005 SLK 350
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1000
Re: Transmission lifespan - 300SD?

That is a good estimate 200,000-250,000 miles. It depends on whether the miles were highway miles or city miles. I was able to get 225,000 before it started slipping. A used one can be 300-400 dollars, but the installation price is just the same---900 dollars! A Mercedes-Benz re-made one can be bought cheap now. They want to get rid of them. The tranny can go for another 200,000 if maintained properly, filters, fluid changes.
#147963 - in reply to #142101
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Posted 12/6/2017 2:47 PM
bluegg
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Date registered: Nov 2016
Location: Oro-Medonte, Ontario, Canada
Vehicle(s): 1985 300GDT, 2003 Beetle 1.8t S, 1982 F350 SC Dual
Posts: 129
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Re: Transmission lifespan - 300SD?

Woody.
There are so many variables to consider in the lifespan of anything.
Most comes down to maintenance, use and abuse.
Keep in mind the 80's Mercs were bought and owned by well off individuals who had multi vehicle stables and maintenance was only money.
Those people also had kids with less appreciation for the value of what they drove when daddy let them and abused a lot of what they got their hands on.
These older cars and trucks are always a gamble.
The g wagen odometers don't even count the hundreds of thousands of miles or KMs.
The speedo is also so easy to swap when the unit itself was readily available.
Your frustration to lack of answer to your question is understandable but I think the "no news is good news" applies.
If the transmissions in the SD's were known for low KM failure you would have got more response.
The fact that Mercedes is selling these transmissions cheap to unload tells me they were not a high demand replacement part.
It also seems to me they may even be strong enough to sub into a G if alternatives were zero.
#237820 - in reply to #142101
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