With a manual trans you already have a second brake, just down shift watching your tach so you don't over rev your engine. Assuming your trailer brakes work good, your manual trans is back up or often in addition to on long downhill stretches  A jake or exhaust brake really is not needed with manual trans, usually used with auto trans as auto trans has no holdback on down hill other than holding unit in a lower gear, which can be damaging to a trans if not careful.

  Say What !!?

Saddleup ... In a comparison between a gasoline engine and a diesel ... The diesel has little engine braking with out some sort of restrictor.  Here's an explanation copied from the net.

A gas engine has more engine braking than a comparable displacement diesel because at low throttle levels a gas engine is working against a closed throttle plate. A diesel has a wide open intake manifold without a throttle plate.

Think of a diesel piston and cylinder like an air cylinder. If you press the piston up to near TDC with the valves closed, it takes a lot of pressure, right? But guess what, after rotating beyond TDC all that compressed air now pushes down on the piston to accelerate it to BDC.

A gas engine will generate about 25" of vacuum with the throttle closed, so when the piston comes up to TDC, very little pressure is there to push the piston on the down stroke. Then, when it wants to pull in a fresh charge, the engine has to pull against the vacuum. All this consumes energy and creates what is termed "compression braking".

Of course, a diesel does produce some compression braking due to mechanical losses and heat generation, but a similar displacement gas engine will always generate more "compression" braking.

As I said a diesel will provide some braking using a manual trans, down shifting using your tach....... I still stand by it from 40 years of towing, I do appreciate your quotes from the net, however remember boys..........  they are selling jake and compression brakes, its the net they will tell you what they want you to hear...

However, I respect your take on it... please respect mine..

tks

It is not a matter of respecting opinion or "take"

Logical explanations stand on their own.  Trot-on can downshift a gasoline engine car and his diesel engine truck to experience inherent engine braking between the two.

Exhaust brake not needed with a manual trans????     Sorry but where I tow I use the exhaust brake every time I slow down or stop.  Apparently you have never decended a 6-7 or 8% grade with 17.000# of trailer behind you.    I am on my 5th diesel manual pickup for towing and every one of them has had a exhaust brake, my service brakes last well over 100,000 miles and the trailer brakes at least that long. 

I have used the PacBrake on all of the trucks.  The current PRXB is considered a "State of the art" with its exhaust bypass valve.   The fact that  PacBrake stands behind the product is the biggest thing for me as a mechanic.   The brake will help your truck to slow the load so you can downshift easier without overreving the engine.  It usually takes a bit of towing to get familiar with using the brake in the most effective way.  After you have a ex brake you will wonder how you ever got along without one.  

The PAC-Brake is an excellent exhaust brake. And yes, it makes a big difference in what you can descend a steep hill with. It allows you to be safer, and to reduce wear and tear on your rig. And on yours specifically, it will probably make your rotors last longer, and warp and crack less! I'm in the Rocky Mtns, and haul and have hauled through the mountains all my life, both with pick-ups and trailers of all sizes, and tractor trailers.

The difference between an exhaust brake and a jake brake(Jacobs engine brake) is basically an exhaust brake restricts the air flowing out of the engineby plugging(mostly) the exhaust pipe. The jake brake actually opens the exhaust valve(s) at the top of the compression stroke, releasing the compressed air  and absorbing the energy instead of allowing the compressed air to expand again and push the piston down. It basically turns your engine into an air compressor, the wheels are what drive it. Clear as mud? Hope this helps a little!

Bill

These after market products only work on the older Ford Powerstrokes. 6.0L or 7.3L

B&D did have an exhaust brake for the 6.0L with automatic tranny.  The one I have on my 2006 truck worked very well.

The new Ford 6.7L using the turbo to restrict exhaust flow and I find it works very well if I use it properly.  It don't stop the truck, But it will hold speed on steep grades.  1st gear is 25mph, 2nd gear is 40 mph and 3rd gear is 60 mph.  These speeds are all around 3000+ rpms.  Which is where you get enough back pressure to produce some braking.  At least with my 13,000 lbs trailer.

While the diesel engine has much higher compression ratio, it is not working against any restriction... therefore a jake brake, inlet, or exhaust restrictor is needed.  See my post on page one of this thread for an logical explanation.

Exactly. And that is also why a jake works so well- you compress the air on the compression stroke- then at the top of the stroke, you release all that compressed air so it doesn't push the piston back down.

Your efforts weren't for naught- probably saved you more than a few bucks over the years as far as replacing brakes! To say nothing of the gray hairs you didn't get cause you didn't scare yourself!