I agree that that the C12 in the MK-36 Wrecker is much more powerful but I've used the C7 power in a M1089A1P2 quite a few times and it does better than you might think. I've lift towed quite a few MTV's and can still run on the governor at 62 MPH. with the transfer to forward most rear axle disconnected. I also have a M984A4 and it tops out at the same speed but gets there a little quicker since it has a C15. Please note that these are not my personal trucks, I'm still in the National Guard and you fine taxpayers purchased these that I have the opportunity to operate. Thanks Kindly.On a side note, a wrecker version MTVR would be a nice replacement for the underpowered M1089.