Auto transmision fluid in radiator


Old 03-22-07, 07:09 PM
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Auto transmision fluid in radiator

I have been using a lot of automatic transmision fluid and it is not leaking. I found some in the radiator of a 2000 Grand Am. What is causing this and how do I fix it?
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Old 03-22-07, 07:18 PM
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replace the radiator

inside the radiator is a trans oil cooler. Apparently it is leaking.
Old 03-22-07, 08:01 PM
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I agree with Nap. Definetly a cracked trans cooler within the radiator.
Old 03-22-07, 08:13 PM
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Do I just have to replace the cooler or the radiator or what?
Old 03-23-07, 02:59 AM
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the whole thing

It is one unit cooler and radiator.
Old 03-23-07, 06:08 AM
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You could also cap off the cooler and install an external one as an alternative to replacing the radiator.
Old 03-23-07, 06:24 AM
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I vote for a new rad, this will also help your car to run cooler. A 7 yr old radiator unless it has been flushed regulary and kept with proper coolant, it probably isn't as efficent as it used to be. You also don't have to figure where/how to install the trans cooler.
Old 03-23-07, 11:24 AM
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Once you take care of the leak and flush the coolant (you may need to flush a few times with detergent before refilling with coolant to remove the sludge), I'd be worried about coolant in the transmission fluid.

Look for any milkiness in the transmission fluid. Coolant can destroy the glue that binds the clutch material to the metal backing and result in expensive damage to the transmission. You may have to completely exchange the transmission fluid.
Old 03-23-07, 04:34 PM
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good advice

Good advice about the transmission it might have backwashed coolant into it.

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