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  #1  
Old 10-28-2011, 11:16 AM
farmmedicoh's Avatar
bindlestiff
 
Join Date: May 2008
Location: NE corner of OHIO
Posts: 64
transmission fluid smells burnt

the saga continues
took my 85 300SD on it's first long drive yesterday
got about 70 miles into it and noticed that the tranny started losing power at highway speed when i was going up hills
nothing terrible
should mention that it still shifts very gently
(thot they were supposed to be a bit stiffer)
after about 90 miles i pulled over b/c i was looking at an 800 mile one way trip and wasn't liking my options of getting stranded in the middle of nowhere
fluid level seems just a tiny but high but there was no foam in it
it does smell burned tho
it shouldn't
it's new fluid
i didn't change my filter when i took the tranny out of the 82 but did drain the torque converter
going to drop the tranny oil pan and change the filter and clean out the pan this time
what causes the burned smell?
is it as bad a sign as i think it is?
thx

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  #2  
Old 10-28-2011, 11:53 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
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What causes the burned smell? Friction.

The brake bands and the clutch packs are made of paper(?) based friction material bonded onto steel. Under normal circumstances they'll work - but when they get old or contaminated...

How old is the fluid?
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  #3  
Old 10-28-2011, 01:32 PM
farmmedicoh's Avatar
bindlestiff
 
Join Date: May 2008
Location: NE corner of OHIO
Posts: 64
not even 2 months
the filter on the other hand could be very old
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1982 MB 300SD
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  #4  
Old 10-28-2011, 01:38 PM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Well like you say...

Drain the torque converter (consider doing the transmission oil cooler lines too) replace the filter and check for debris. Drive it and see how you go. As we don't have smelly-net (thankfully!) I'd take a sample of oil to someone who knows, to get a second opinion, if you are unsure about the burnt smell.
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #5  
Old 10-28-2011, 01:41 PM
farmmedicoh's Avatar
bindlestiff
 
Join Date: May 2008
Location: NE corner of OHIO
Posts: 64
i read in one of the other posts (somewhere) that doing that can cause as many problems as it fixes.
i've got the pan off now
looks clean for the most part
the filter is a bit dark but not BLACK
i'll do the full meal deal again and see what happens
thx
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1982 MB 300SD
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  #6  
Old 10-28-2011, 04:22 PM
d.delano's Avatar
Dönerkebap
 
Join Date: May 2004
Location: DC
Posts: 1,466
Someone said that draining the torque converter and replacing the fluid and filter causes problems? On this forum? Did I read that right? Am I missing something?

Stop being so cheap and change the filter along with the fluid when you do a transmission service.
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  #7  
Old 10-28-2011, 04:28 PM
oldsinner111's Avatar
lied to for years
 
Join Date: Nov 2008
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Old wives tale.Clogged filter can burn up clutch packs.

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