2nd Gen Non-Engine/Transmission Jake brake on ebay

[SRath]

I think they have the description wrong on this jake brake. they say it came off an '01. They also say it fits from '96 to '02.

The part number they give matches nothing I can find on the Jacobs website or in any internet search. If I read the Jacobs site correctly, this would be for '98. 5 and up 24 valve motors. Not for 12 valve motors.

I don't know what differences there are, and a jake would be a cool thing to have, but I think any 12 valve owner that bids on this will be disappointed.

Anyone know more about these and what they fit?

I have had jakes on almost all of the semis I drive, but they come that way when we buy them and I give no thought to them as long as they work.

Jacobs / Jake Exhaust Brake Dodge cummins 96-02 manual:eBay Motors (item 120474732211 end time Oct-05-09 12:06:25 PDT)

 

[icman95]

This is the one I have on my 01 and I know it won't fit all the years he says. First of all, not all the turbos were the same in all those years. The jake in mine bolts to the turbo, just like in the ebay ad. There are some turbos out there that have the exhaust attach with a band clamp which would require an inline exhaust brake, not the one shown in this guy's listing. If you have a band clamp, it won't work. Also, If memory serves, 2001 was the first year that Dodge made them available for the Cummins, so I'd have to imagine that there was something preventing them from fitting them to prior years. I'm fairly certain that he doesn't know all that he talks about because he says that it came off of a manual, but it could be used on an auto. That isn't true. Dodge specifically didn't allow them to be installed on the autos in that year because the trannys weren't up to the task. There are nylon (plastic) parts in the transmission that,over time, can't take the extra heat generated by the braking forces caused by the jake. This jake set up is plug and play for the '01-02. The truck's ECM was made to take it and there is a port to plug the wiring harness from the jake into. I'd bet that there is no such thing on your 96 because it is still a 12 valve and won't have the same computer as the 24.

 

[GAmes]

The seller is also mistaken about needing new exhaust valve springs on the 01. 24 valve engines come with 60 lb springs. That looks nothing like the Jacobs brake I have. I bought mine from Cummins when the truck was new, I don't know if Dodge had them available at that time. I still have the box it came in, might have the part# on it if you want that. BTW, the Jakes on your big trucks work by changing the valve opening/closing sequence. All we have is the "potato in the exhaust pipe" brake.

 

[MonkeyMagic]

I am running the same Jake brake pictured in the Ebay ad on my 98 12V... mine came off of a 01 24v truck. I had to make a few small changes in the wiring setup... by default, the Jake brake wanted to use a trigger wire off the computer, so I bought a switch from Pacbrake that mounts under the throttle peddle, and a shifter mounted switch like BD sells with thier kits, for the master on/off switch. Works great.



Forgot to add, because the 12v's don't come with 60lb exhaust springs, I had to install a set on mine.

 

[GreggNoble]

Guys,just wondering if this jake brake can be installed on a truck that already has a Banks 4" Power Elbo installed? are these brakes very effective? i have an 01 3500 flat deck and when towing i sure could use some brake help.

 

[GAmes]

Guys,just wondering if this jake brake can be installed on a truck that already has a Banks 4" Power Elbo installed? are these brakes very effective? i have an 01 3500 flat deck and when towing i sure could use some brake help.

If the power elbow is mated to a 4" exhaust you would have to get an adapter and the power elbow would have to go. The EB is the elbow. EBs are effective on an automatic only if you can keep the tq converter locked up while decelerating. Do a search on, IIRC, mystery switch. Note the previous thread on why Dodge didn't approve an EB in 01.

 

[Wyomingcowboy]

You should be able to spend $100-$200 and make a go of this brake on your truck. These things are over $1k new and it might be worth the hassle of chasing down parts/making it work for the savings. Up to you though.

 

[GreggNoble]

i know my profile mentions my 01 2500 automatic,but for work i also have a 01 3500 with a lifting flat deck and it has the 6 speed manual trans, so on my flat deck would it be a straight forward fit after the power elbo is removed?

 

[GAmes]

... ... ..... would it be a straight forward fit after the power elbo is removed?

If you have the stock 3" downpipe, yes, I would think so. That kit might not be complete though. Don't know what all came with a 24 valve assy.

 

[HBarlow]

The original Jacobs Exhaust Brake installed on my '01 HO/6spd began sticking closed at around 175,000 miles and I had to replace it.

Beware buying one on eBay of unknown origin.

 

[Wyomingcowboy]

I bought a used pacbrake that needed a new vacuum cylinder after 1 winter for $160 bucks. It was still cheaper than a new one.

 

[Wyomingcowboy]

The cylinder was $160. not the brake. It was like $400 +/-

 

[bmoeller]

There are some turbos out there that have the exhaust attach with a band clamp which would require an inline exhaust brake, not the one shown in this guy's listing. If you have a band clamp, it won't work.

My 97 used a v-band clamp, HOWEVER, the piece on the tubo that took the clamp was removable. That brake would work on it. My '99 has a 1 piece cast elbow that removes the clamp connection. That brake will fit my '99 as well. Basically, it should in theory fit all HX35 turbos. Unsure of the HY, though.

I'm fairly certain that he doesn't know all that he talks about because he says that it came off of a manual, but it could be used on an auto. That isn't true. Dodge specifically didn't allow them to be installed on the autos in that year because the trannys weren't up to the task. There are nylon (plastic) parts in the transmission that,over time, can't take the extra heat generated by the braking forces caused by the jake.

He specifically says to double check that it will fit the buyers application, and that they aren't sure if it will fit all 2nd gen trucks.



To nitpick, just because it doesn't have the OEMs blessing to be used doesn't mean someone still won't use it, or that it won't fit.

This jake set up is plug and play for the '01-02. The truck's ECM was made to take it and there is a port to plug the wiring harness from the jake into. I'd bet that there is no such thing on your 96 because it is still a 12 valve and won't have the same computer as the 24.

Easy enough to get around.

 

[icman95]

He specifically says to double check that it will fit the buyers application, and that they aren't sure if it will fit all 2nd gen trucks.



To nitpick, just because it doesn't have the OEMs blessing to be used doesn't mean someone still won't use it, or that it won't fit.

Yes, of course I saw that he said this, and if he knew what he was talking about, he wouldn't have said it. There is a reason that there is no OEM blessing to use them on autos. Just because something can be rigged to fit/work, doesn't mean it should. It would suck to buy the part at a good price and save some money, but then ruin an auto transmission and have to spend much more fixing it just because it's possible to force it to work in a situation where it shouldn't. I'm sure there are guys out there that have them on their auto trannies before Dodge allowed it, and maybe even have never had a problem. But why tempt fate?

 

[GreggNoble]

guys, how effective are these exhast brakes? i know its not a real engine brake like my M11 Cummins has but does it make a huge difference?

 

[icman95]

Yup, big difference. It holds my truck/5er camper very well going downhill. Great to use in any situation. I had a Freightliner with a Cummins N14 and a compression engine brake and while that probably held a little better, these brakes are similar in effect. We have them in our Kenworth T300 straight trucks at work-Cummins ISC 8. 3l engines with Pacbrakes. Mechanically, a batch of our Pacbrakes fail to work properly most of the time, but when they do work, they work quite well. They slow the trucks down just fine. A very good investment, overall.

 

[Bob Cochran]

To make work and have no automatic transmission problems you need to lock up the torque convert. I believe that is what the "mystery switch" does. I would say there is a whole lot of people here that use exhaust brakes on automatic transmission's.

 

[bmoeller]

To make work and have no automatic transmission problems you need to lock up the torque convert. I believe that is what the "mystery switch" does. I would say there is a whole lot of people here that use exhaust brakes on automatic transmission's.

Yes, you need to be able to lock the T/C, but you also need something like a Pressure-Loc or controller to raise the line pressure so the plates won't slip. A better v/b with higher line pressure will help as well.