I recently installed a Circle D 3,000 rpm stall converter on my 05 Ram with a Spartan plus cam. Wow, can't believe the difference. My cam is a higher rpm power cam, pulls like a train above 3500 rpms but was a mite weak off the line. Now it will roast the tires in 2 wd,
4wd launch is neck snapping and I finally got a chance to try it on dry clean pavement driving at 45 mph, I nailed it, it downshifted hard and broke loose, truck went sideways and I had to let off the gas. Not bad for NA hemi in a 6,000 lb Ram! If you have a 2003-2008 hemi and have a cam, especially a hot cam, this is a nice addition. Very helpful folks too.