Just wonderingabout the factory jake in my truck....it seems to dump (lose engine braking power) if the load is too great for the jake brake to hold,is this normal? I havent done any hauling with it yet (probably never will) so I dont have much experience with it.

 

How does it feel like it loses braking power on heavy loads if you haven't hauled loads with it. My truck unloaded stops great with it- I have an auto and manually downshift it all the time- works great!

 

I meant if the revs were too high...(engine load)

 

I don't know, mine seems to work well all around. Even if im going slow and in a low gear it works good, on the highway don't even need brakes with it.

 

Im just wondering if this is a sign of a problem....sometimes if I am downshifting fairly aggresively, it seems to cut out, almost like it is dumping, then it kicks back in. Other than that, I think its a great option. My rear brakes had rust on the rotors still after 3 weeks of driving it!

 

I believe the pamphlet that came with mine says not to exceed 3000 or 3200 rpm but it also says it works better with higer rpms. I use mine 24/7 loaded or not and it works good.

 

I have a Pac Brake and the more RPMS the better! However I think the design has changed in the past couple of years. Mine is a butterfly valve in the turbo elbow. The ones they are making now are a different design and actually work on lower RPMS. Mine doesn't do much good below 1500 rpms but the newer ones do.

 

I have no experience with light trucks with an engine brake, but they have to release when the engine is decoupled from the wheels or really bad things will happen. The guys with autos won't have that problem. Applying the clutch or throttle will defeat the brake. I think yours is doing what it is designed to do.