No, this is not a question about swinging. I have 98 GMC Jimmy with a knock in the motor. I bought a 2000 Chevy Blazer for $700 with a bad tranny. Both vehicles have the 4.3 Vortec V6. Question is the when I started pulling the donor motor I dumped the oil and noticed it was a funny shade of brown. The oil wasn't milky like it had coolant in it but just a rather unusual color of brown. Anyone with ideas of what the problem might be. Should I continue with the swap. The motor sounded great no knocks or pings, plenty of power, and so on. After dropping some type F tranny fluid in the tranny I drove the truck up and down the road and it had power to spare.This is my wifes daily driver by the way.