The Jacob's exhaust brake is tested and validated by Cummins and Dodge. They certainly don't do a very good job of marketing one of the only real competitive advantages they have over the other 2.

It's 100k mile warranty.

 

LOL...document to support this?....order in the court?...
lol...I meant on the '06's....my bad....
I guess I dont need documentation, Ive been parts and service director for 15+ years for DC, I check for the documents...lol

 

Ditto....Im sure the calibration can be developed. You have to understand it also from a marketing standpoint. as a retailer, If i build it, will a majority buy it (calibration).
and you guys have no idea how many people are trading 03-04.5 HPCR's, just to get the 610 and/or exhaust brake....The numbers would surprise you.
as far as can bus...its **** ugly. Ive been master tech skill level 4 across the board now for 6 or 7 years. and I hate it...I hate starscan...and I want my DRB...LOL

 

LMFAO!!!

 

Like I said they market it...I think Jacobs is a Cummins owned company, they test it and validate it cause they are marketing it. These things are simpler than spit... An air operated 4 inch valve. The advantage of the jacobs brake on a 48re 2006 is that it doesn't need a separate brake controller as the ECM is able to enable it with the Torque Converter lock up. The advantage of others like mine is that you can adjust the ebrake enable speed points. The advantage of the jacobs is that you can get it included in the truck price for financing and it is included in the powertrain warranty up to 100k miles....It doesn't do anything for your tranny warranty and you still have the stock piece of crap Torque converter to do all that braking. I don't think the stock tranny will hold back as much as a built triple disk TC. Any Exhaust brake is better than no ebrake if you tow heavy. ks

 

When was the last time you saw an advertisement for the exhaust brake? If they are marketing the exhaust brake, its the worst marketing I've ever seen.

Cummins does not own Jacobs electronics.

what is this "ebrake enable speed points". The exhaust brake comes on at all vehicle speeds unless your less than 10 mph. It certainly works at all engine speeds. Do you mean you can control the converter lock up and therefore when the brake will come on (the Jacobs will not come on unless the converter is locked). Hopefully, "brakes like yours" don't come on when the converter is trying to lock up. That's prolly why you need a triple disc TC.

Expain, "It doesn't do anything for your tranny warranty".
Nothing I know of (besides money) helps any part of the vehicle's warranty.

Just because you voided your warranty with a PacBrake does not mean you should be telling people to buy one too.

 

Cummins sends me an ad in their newsletter every month, they advertise in diesel power magazine and other truck mags, they advertise on this site and the TDR, about the only thing they don't do is go to your door and knock.

Jacobs Vehicle Systems is owned by Dannher Corp which Cummins apparently owns 15% of. Cummins call the Jacobs Exhaust Brake a Genuine Cummins Exhaust Brake.

I can set the ebrake to come on at 5mph intervals between 18 and 48mph. This is great for driving in communities that don't allow engine braking, or on icy roads.

I can lock my converter up in first gear at 18mph if I want. You get no useful braking with the ebrake unless the TC is locked. All you do if the TC is not locked is heat the tranny and stress the tranny with excessive heat. The rear wheels won't brake if they are not locked to the engine. The 06 48re will not lockup in 1st gear. In second gear the Exhaust brake is not effective below 30mph as rpms and exhaust braking effect is low. I have very effective braking to 18mph. The exhaust brake does not work at all engine speeds....the effectiveness drops with engine rpms. The higher the rpms the more exhaust air volume and pressure to provide braking.


All torque converters are rated for efficiency, total combined weight, and horsepower. The stock torque converter is rated for 325 crank horsepower, with a 22,000 combined weight at 78% fluid coupling.

I have a triple disc Tc because I wanted/need a rating of 650 crank horsepower, with a combined weight of 30,000 pounds at 91% fluid coupling.

Exhaust brakes use the drivetrain to brake loads. The stock torque converter will not handle heavy loads and heavy exhaust brake use. Neither will the crappy stock ujoints and non billet tranny shafts. There is a big difference between acceleration at WOT and decelerating with a locked tranny and a max load. You accelerate a heavy load to 65mph over a mile. You decelerate it over 500feet if your lucky. Alot more stress in a shorter period of time braking.


I didn't!!!! My truck had over 90k miles on it when I put it on so it had no tranny warranty.
I clearly advised people to put 70k miles on so that their tranny warranty was out. I don't think any of the exhaust brakes will void anything other than the tranny warranty. Some of the older trucks with soft valve springs might get some valve float but the HPCR trucks have pretty hefty valve springs. ks