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  #1  
Old 12-22-2006, 06:07 PM
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Who has flushed trans cooler in their Benz??

1991 300E

First I want to ask only for reply of people who have really flushed their cooler!

1)I'm in the middle of replacing my transmission. Reverse is gone at 216,000 miles. I've been told typical problem on the car and the miles were right for reverse failure.
2)I've disconnected the lines to the tranny cooler (which ofcourse is part of the radiator)
3)I've used the typical transmission cooler flush agent you can find at most part shops.

Now to finish it, I'm using a hand pump to flush again with transmission fluid, Now my question!!! Those of you who have done this..... Did it take a serious amount of pressure to get the fluid through it??? I don't know what the inside of the cooler part looks like, but its not easy getting the trans fluid through. It is taking more force than I'm used to, but I'm not a Mercedes guy, so I have no idea what to expect. It will flow with quite a bit of force, but I'm wondering if its normal, or time for a radiator replacement. No need to spend money, if I don't need to.

Anyone done the same process?????????

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  #2  
Old 12-23-2006, 11:26 AM
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another flush...

I didn't get a reply, but I did get my hands on similar car, a 280E. Tried flushing the trany cooler. It is the same, it took a good amount of force with a hand pump.
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  #3  
Old 12-23-2006, 11:53 AM
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Who has flushed trans cooler in their Benz??

Quote:
Originally Posted by cool123 View Post
I didn't get a reply, but I did get my hands on similar car, a 280E. Tried flushing the trany cooler. It is the same, it took a good amount of force with a hand pump.
If I'm correct the cooler also a warmer for startup and extreme cold climate, therefore there is probably a regulating orfice in the cooler to control flow.
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  #4  
Old 12-23-2006, 02:38 PM
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The transmission cooler which is internal, part of the radiator is plugged with reverse clutch debris. Try blowing compressed air thru the cooler, about 10lbs. the only other option, radiator shop, they will boil / clean the cooler or buy a GOOD external transmission cooler and bypass the radiator.
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  #5  
Old 12-27-2006, 07:21 PM
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it is not plugged up, i'm just trying to determine if the force required to push fluid through it is normal or not. the 280E was the same. so I guess its alright. have you done this with a hand pump????
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  #6  
Old 01-01-2007, 12:54 PM
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Hmmm, I just replaced the radiator on my '91 300SE. I took the old trans cooler out just to look it over. It's just a big metal tube with what appears to be some spiral-wound metal inside (kinda like Christmas tree ropes). No thermostat or valve or restriction whatsoever. I ran water through it with no resistance at all. In fact, I actually ran the water hose through the new one, followed by an air hose, and then some ATF, just to be sure there was no residual crud collected there (the new radiator came witn no plugs on the cooler fittings). The water and the ATF ran through with virtually zero resistance.

DG
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Old 01-01-2007, 01:26 PM
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Quote:
Originally Posted by S-Class Guru View Post
Hmmm, I just replaced the radiator on my '91 300SE. I took the old trans cooler out just to look it over. It's just a big metal tube with what appears to be some spiral-wound metal inside (kinda like Christmas tree ropes). No thermostat or valve or restriction whatsoever. I ran water through it with no resistance at all. In fact, I actually ran the water hose through the new one, followed by an air hose, and then some ATF, just to be sure there was no residual crud collected there (the new radiator came witn no plugs on the cooler fittings). The water and the ATF ran through with virtually zero resistance.

DG
I totally agree with you, little or no resistance.
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  #8  
Old 01-03-2007, 08:45 PM
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i quit screwing around. autopartsplace.com has a radiator for $160.00. I've had good luck getting parts from this site. the cheapest place in town wanted $298.00...

I'm tired of the local places and the unreal mark up!!!!!!!!

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