I use mine just to start. Never had a problem. And on big trucks, our petes never get a clutch excepte when you start. Try hitting the clutch and see what happens!!! It will work great when you double clutch just the transmissions as they were designed to.We have trucks with 5000,000+ Missing a comma or one two many zeroes? 5,000,000 miles would be impressive with no mechanical troubles but something tells me that's not the case...and no transmission problems. It is amazing what happens with people that know how to shift!!!I'm assuming that you have an eaton transmission (excuse me if I'm incorrect but it is by far the most popular and even then, if it another brand it practically a carbon copy). The eaton representative said it has nothing to do with how smooth the transmission is shifted or how precise the timing is, not using the clutch to disengage the gears "scrubs" the backside of the dogs putting metal shavings in the transmission lube. Throttle blipping doesn't even help the pull out of gear. It still has to scrub the dogs..