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Well as the subject says the dealer is installing my Jacobs exhaust brake today. Can't wait to see how it does on my trip to North Carolina. I was talking to the service manager and transmission man about my concerns with the 48 re. They told me they have had very little problems with it. The only problems they have seen was self abuse from racing and people pulling large loads with the tow mode not on ect. Well we will see how see does in the mountains pulling a 36ft 10,500# camper.
it has an arming switch, and works off a signal from the ECM. when it see 0volt from the TPS it activates the brake closing off the exhaust stream increasing back pressure.
normal "Jake Brakes" OTR trucks use are integrated into the valves and open the exhaust valves TDC on the compression stroke of the piston.