How well does a jake brake help when pulling 20,000#. Does it cause extra wear and tear on your truck, Is there one out for an 2006 auto tranny and would it void my warranty.

 

Dodge offers a jacobs exhaust break for the 48re on the 06. Never used an exhaust break. I've used engine breaks for ever. Both will save on brake maintenance. I do plan on installing one on my 05 but not till next winter. Not sure which one PacBrake or a Jacobs. These are not approved for the 05 auto.

 

keep in mind there is not an engine brake that will work with the 5.9 cummins

 

[QUOTE]Yes there is! Mine gets installed next wednesday, MOPAR approved with warranty.

 

MAD DUC, The point horsehauler was making was that you are getting an exhaust brake not a engine retarder jake type brake. Big difference same goal. ks

 

What is the difference between an engine and exhaust brake? I talked to my dealer about installing a Jacob's on mine. Will it sound like a big rig? They quoted me about $1500.00 installed, is that a bad price?

 

The biggest difference between the two is this;

An engine brake is located between the block and the head and when it is operating, it opens the exhaust valve on every upstroke of the piston, near the top of the stroke. In other words, every upstroke compresses the air in the cylinder and then near the top of the stroke, the exhaust valve opens up, releasing the compression. It basically turns the engine into a giant air compressor and the engine (and thereby the speed) is slowed, using compression to slow it down.

An exhuast brake is nothing more then a flapper valve located in the exhuast pipe which closes when operated, thereby creating compression back into the engine, slowing it down.

They both do somewhat the same thing, using compression to slow the engine, but they do it in different ways.

From my experience with the Jacobs exhaust brake, the sound inside the cab is somewhat similiar to the sound of an engine brake, but outside, since the Jacobs exhaust brake uses vacuum to operate the flapper valve, it sounds more like a vacuum leak.

DMH

 

06er, You wont regret getting one. Now it wont put you through the windshield but it will help hold you at the speed you desire without using you service brakes. And you will be amazed how much you'll use it where you used to use your service brakes. especially hauling 20k. Now for your next question. ( I know you'll be asking this). It does not sound like a big truck. It will rumble a little but mostly sounds like a big blow gun.
As far as mechanical downsides. There are none. Your engine and truck are designed for its use.

 

Let us know what you think after you get it installed. Ask if they reflash your ECM or use something else to lock the torque converter. I'm not sure but I think the Jacobs has a npt port for a egt probe. I read some one has the port just not sure who it was. PacBrake has a setup for the 05 auto but requires an ECM bypass they make & torque converter locking device from ATS. I'd love to put it on before summer but it will have to wait till next winter.I spend to much money in the summer chasing races all over hells half acre. Buy then I'll have enough feed back to deside which & what to install.

 

I have one on mine and it did hold the truck back comming down out of the mountains here in Colorado, no load on truck yet, but it did hold the truck. Seems that it only works when needed.

 

I have the Jake exhaust brake on mine. Hauled my tractor and some attachments from Indiana to Florida. Gross weight (truck and trailer) was probably around 20K pounds. Came down Mt Eagle in third gear with the Jake on. Speed stayed pretty constant at approximately 45 mph. I was pleased with the performance of the Jake brake. I hardly had to use the foot brake except if someone cut in front of me. Can't wait till Spring to get the 5ver (13K pounds) hooked-up and taking a trip to Utah. As you probably know, the Jake exhaust brake has much more braking power at higher rpm's. It really has a lot of braking power when the truck is in 2nd gear and the rpm's are around 2,500. That's the gear I would use if decending a long 7+ percent grade with a heavy load. I am very pleased with the Jake brake. Good luck with your decision.

 

That sucks. Why can't you get the "Big Truck Jake Brake" sound out of it on a 5.9 ??

 

Because Cummins/Jake does not make (nor can they) an engine brake for the 5.9. BTW a properly muffled class 8 is very quiet when running the engine brake. Those signs are put up for the guys running straight pipes and jakes.

 

I have got a bd on mine, love it, but my next truck may be an auto,

with the auto, will the converter lock up, brake work in 1st gear at about 5mph? or can something be reset for it to engage?