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i dont have one but have heard that other brands of exhaust brakes work better like BD or pacbrake
My buddy had Dave Smith Motors install his Jake,thus guaranteeing it for 3/36,000. There have been some posts of compressor seize-ups though. I had a Pacbrake on my '99 and it retarded speed more aggressively than did the Jake onmy buddy's '07.
I too have an 07 w/ the 5.9L (automatic transmission) and was thinking of the Jacobs exhaust brake. The approximately $1,800 (installed) price tag, so far, is too steep for me. I don't really need one in Michigan but was interested in the enhanced warm-up capabilities for cold weather. That would certainly help in Michigan. Opted for the "blanket" that controls the amount of air entering the radiator. Will see if that suffices.
From what I have read, the Jabcobs brake is the only one that will not void the engine (and transmission) warranty. I believe there is some software that is included with the kit to control the torque converter lock-up and protect the automatic transmission.
Would certainly be interested in hearing how you like it if you do decide to install the Jacobs unit.
Was just re-reading your original post. Why did you get rid of the 6.7 liter? I did not want to buy the 6.7 during the first year of production but haven't had a chance to talk with any one that owns (or has owned) one. My concern(s) were mostly of rumored fuel economy problems.
Would be interested in what you have to say about the 6.7. I test-drove one and it certainly operated smoothly and was very quiet. I believe it comes standard with the Jabobs exhaust brake. At the time I didn't know the the cost of adding a Jake brake to the 5.9 engine. Figured I'd use the $2k to buy some creature comforts in the cab. So far am happy with the decision but would like to hear from someone who has had a chance to own both engines.
I loved my 6.7 for the first 5k, it was very strong and got good MPG and had no problems. Then on may way to work one morning my yellow light of death started blinking and the truck died. It was towed to the dealer and the turbo charger was all burned up inside, it looked like it had over a million miles on it, and when they looked further the valves were burnt and full of soot, and my pistons were shot. On a conference call with Cummins and Dodge engineers they did admit that they are having what they called "back pressure issues with with new emission system." I never beat on my truck, used only ultralow sulfur fuel, and never let it idle. The truck needed a complete overhaul at 5k. The dealer did an even swap with me for a 2007 5.9 last night. The 6.7 is an extremely powerful engine, but they really need to get the bugs out of the emissions and their "back pressure" problems. Good luck and I hope this helps.
2007 Dodge 2500 4X4 5.9L Cummins with 4 speed Auto, Quad Cab SLT Thunder Road with Jake Brake, 5" turbo back Cat Delete FBD exhaust, Edge with Attitude, 2"HBS leveling kit and Tekonsha P3 brake control.
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