Oil in coolant reservoir on 1998 Jeep Cherokee

I had the tranny cooling radiator replaced. I was getting light-brown sludge in the rediator and reservoir. Now I have dark-brown sludge only in the reservoir; radiator seems clean ( unless the sludge settles to the bottom). What's up?

by in Morgantown, WV on May 01, 2009
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1 answer
ANSWER by , May 04, 2009
Clean out the coolant reservoir, maybe the oil from the trans cooler settled in the reservoir.