I have been pulling heavy trailers all over the US for about 10 years now. My trucks last 18-24 months until I find them just not worth putting additional money into. Example '97 180,000 miles, 2000 300,000 miles, '03 235,000 miles and brings me to my '06 that I've logged 27,000 since March. After a recent trip to the great Northwest I'm tierd of trying to get good braking out of my triple axle 40' trrailer. No matter what I do I can't get enough braking power. Big question, is it worth the $2,000 investment for a jake brake on a truck that I'll have for maybe 2 years if I continue going through trucks the way I do?