It's time for me to give the Aw4 a little love. It seems to shift into 2nd when I need it to stay in 1st and bounce off the rev limiter like a large breasted lady on a trampoline. Who here has done a shift kit or stand alone controller? Have you done both? 40" tires are definitely putting a strain on it so I added a fan to my trans cooler. I also ordered a trans temp gauge to help keep and eye on temps.