The place I got my servo and cooler from has 2 different kits. The Transgo HD2 for $81.75 and a Transgo SK for $39.50. This is what he says about the SK: This kit corrects the common problems with these transmissions, converter shudder, slip, or burn up; 3-4 clutch and 2nd band failure; rear planet and bushing burn up; 1-2 bump, double bump, slide bump. Along with fixing these common problems, you'll also see an increase in the life of your transmission due to the reduced slippage.

If I don't plan on getting the hot tune and really just want better milage and the E-fans turned on will I need a shift kit and if so will the SK be adequate?