Sounds like torque converter shudder. I have two friends with the same set up and they both do the same thing. One is a mechanic and he says there is nothing much you can do about it. He says it doesn't hurt anything. I wish I was more help, but I am no mechanic.
Thanks for the meatloaf recipe. I haven't been smoking long enough to be a master, but people sure like to eat it!! I use hickory in my smoker. I am going to try and substitute some oak for a heat source as well. I have found that cherry gives a nice flavor as well.
They have to pass a safety program that is based on the principals of the NRA before they are even allowed to participate in the program.
And Mac, unlike us as kids, they are required to wear safety glasses!!:cool: