Join Date: Jan 2013
Thanked 69 Times in 51 Posts
Installed it today, and took it for a little test run.
On position 1 the retarding capabilities are barely noticeable, but it is working as you can see the fluctuation on the exhaust back pressure gauge.
Position 2 works very well, and downshifts sooner that it did with just tow haul mode. I think that it will be most effective in higher RPMs.
I will be going over a 10% pass tomorrow and will be able to give it a better test. I just drove around on the flats today.