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  #1  
Old 12-24-2009, 06:28 PM
farmmedicoh's Avatar
bindlestiff
 
Join Date: May 2008
Location: NE corner of OHIO
Posts: 64
i was a fool

what can i say?
i'm not always so good to my cars
i have a 1985 MB300sd with 181K on it
lovely car
not so long ago i was driving from wisconsin to ohio in the middle of the night
it was late and i was tired and wanted very much to get home
my tranny started to slip
i kept driving
it got worse
still kept driving
about 100 miles
got so bad i was only going about 35-45 on the interstate
or less
got home
slept
checked in the morning and found that my fluid was very low
leaky trans oil pan gasket
replaced the oil and it seemed to be all good
2 weeks pass
it's started doing it again
reverse is fine
starts out fine
1-2 is good
2-3 lags
winds out really far unless i drop my foot off the gas pedal
then it shifts but has little power
3-4 same thing only worse
trans oil smells burnt
i know this is bad
a friend said to take the tranny off and just start looking for bad parts and replace them
it feels like the clutch plates are glazed except that it's an automatic
is it fixable by a competent amateur?
is it fried?
if it means a replacement i can do it if i can find a not stupid expensive rebuild
any ideas?
my thanks

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1982 MB 300SD
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  #2  
Old 12-24-2009, 06:39 PM
280EZRider's Avatar
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Join Date: Jul 2007
Location: Medford, OR
Posts: 1,451
The shifting sounds like modulator(s) problems. However and in view of the clutch plate situation, the fried plates (bands) could also be causing the same problem. I would guess they are toast.

Unless you have extensive working knowledge of MB auto trannies, I would not recommend attacking this particular problem yourself. If you ever need to come as far as Cincy for a good repair, I can recommend Precision Motorcars.
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  #3  
Old 12-24-2009, 06:50 PM
Registered User
 
Join Date: Sep 2003
Location: Central, NJ
Posts: 246
I think auto transmissions are "high dark magic". I have no idea how or even why they work. And I think that is true of most people. Good luck.
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  #4  
Old 12-24-2009, 07:51 PM
blackestate's Avatar
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Join Date: Aug 2005
Location: Washington State
Posts: 948
I have one, if only you lived closer.... I would just find a used one and swap it.
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  #5  
Old 12-24-2009, 08:09 PM
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Location: jersey
Posts: 188
when it was slipping you burned the clutches up - and if you have never been inside of one than get a junk yard unit and swap it out == jz
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  #6  
Old 12-24-2009, 08:10 PM
C Sean Watts's Avatar
NOCH EIN PILS!!
 
Join Date: Mar 2006
Location: NC
Posts: 1,318
TWO big ifs

IF it's a 722.31X series, it's not all too complicated internally as far as automatics go and ...

IF you are competent and confident in your abilities, have a spotlessly clean area to work on it and can get the ATSG book on your trans, it can be done at home. I helped a friend rebuild a Chrysler 3 speed but we had all the manuals and parts at hand. It's still going but it's not a daily driver.
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  #7  
Old 12-24-2009, 08:16 PM
layback40's Avatar
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Location: Victoria Australia - down under!!
Posts: 4,023
you could say your tranny bleed to death & then you tried to refill the dead corps with fresh blood. Much easier to just replace it with a good one. Its not worth the effort to try & rebuild one thats been run out of oil. Who knows what damage has been done. When you get another one, they may require the old one as a changeover. If not use it as a boat anchor.
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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
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  #8  
Old 12-24-2009, 11:31 PM
JEBalles's Avatar
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Join Date: Jun 2008
Location: Carlisle, MA
Posts: 1,225
I am closer and I have one for you, if you want one. I'm not sure of it's operation, though. I drove the car, but only about 15 mph. It felt fine, but I'm not an auto guy, only one of our five cars is auto. PM me if you want it.
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  #9  
Old 12-25-2009, 12:15 AM
DrewGerhan's Avatar
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Join Date: Mar 2006
Location: Grove City, OH
Posts: 727
Im 15 minutes west of Cleveland if you want a lead on a tranny, PM me. I know of a few.
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  #10  
Old 12-25-2009, 02:27 AM
rcounts's Avatar
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Location: Kent, WA
Posts: 1,189
Quote:
Originally Posted by blackestate View Post
I have one, if only you lived closer.... I would just find a used one and swap it.
LOL! I have TWO spares - but you live just as far from me.

A good bone-yard unit is probably going to be your best bet for a reasonably priced repair...
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Silver blue paint over navy blue interior
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  #11  
Old 12-25-2009, 08:29 AM
ImBroke's Avatar
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Location: Cleveland, NY
Posts: 2,215
I've bought entire cars for the price of a used transmission. Maybe go that route, sell some other parts and get a free trans?
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  #12  
Old 12-25-2009, 08:35 AM
farmmedicoh's Avatar
bindlestiff
 
Join Date: May 2008
Location: NE corner of OHIO
Posts: 64
parts car

actually that is what i would like to do
i need too many little things around the inside of the car
if have seen rebuilt trans for around $1400
that hurts
anyone near NE ohio have a parts car they wanna get off of?
i am exploring as many routes as possible
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  #13  
Old 12-25-2009, 11:49 AM
okyoureabeast's Avatar
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Join Date: Jul 2009
Location: North America
Posts: 1,645
Quote:
Originally Posted by farmmedicoh View Post
actually that is what i would like to do
i need too many little things around the inside of the car
if have seen rebuilt trans for around $1400
that hurts
anyone near NE ohio have a parts car they wanna get off of?
i am exploring as many routes as possible
I know of a gent in Ithaca NY with a parts car with an automatic transmission. I'm not sure of the quality of it however

Best wishes to you my friend. I'll keep this in mind when I am driving and I start hearing a problem.

Edit: Are you in Ashtabula?
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  #14  
Old 12-26-2009, 11:57 PM
Registered User
 
Join Date: Sep 2005
Posts: 253
If you're game...

Drain the fluid, drop the pan, remove the filter and the valve body.

Have a very clean work area.

Take sharp pictures of everything from multiple angles before and after taking each section apart. Don't rely on your memory.

Slowly take apart the valve body -- taking pictures -- and clean everything. The key thing is to locate all the little ball bearings and other tiny parts and springs back into their proper places.

I hope that will get you moving again at least for a while. Worth a shot.

If you do a search on the site there are links to manuals with exploded views of the valve body. I found, though, that the diagrams did not exactly match how mine (300 sdl) was set up, hence the numerous photographs.

Take your time.

Quote:
Originally Posted by farmmedicoh View Post
what can i say?
i'm not always so good to my cars
i have a 1985 MB300sd with 181K on it
lovely car
not so long ago i was driving from wisconsin to ohio in the middle of the night
it was late and i was tired and wanted very much to get home
my tranny started to slip
i kept driving
it got worse
still kept driving
about 100 miles
got so bad i was only going about 35-45 on the interstate
or less
got home
slept
checked in the morning and found that my fluid was very low
leaky trans oil pan gasket
replaced the oil and it seemed to be all good
2 weeks pass
it's started doing it again
reverse is fine
starts out fine
1-2 is good
2-3 lags
winds out really far unless i drop my foot off the gas pedal
then it shifts but has little power
3-4 same thing only worse
trans oil smells burnt
i know this is bad
a friend said to take the tranny off and just start looking for bad parts and replace them
it feels like the clutch plates are glazed except that it's an automatic
is it fixable by a competent amateur?
is it fried?
if it means a replacement i can do it if i can find a not stupid expensive rebuild
any ideas?
my thanks
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  #15  
Old 12-27-2009, 06:57 AM
Admiral-Third World Fleet
 
Join Date: Feb 2002
Location: Central FL
Posts: 3,068
It's not in the valve body.....

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