RAM 3500 Exhaust brake

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RAM 3500 Exhaust brake

Postby Danny & Cheryl » Thu Sep 14, 2017 9:11 pm

How slow will the exhaust brake continue to work while on a steep down hill with tow haul on and trans in 2nd gear
Danny & Cheryl and Penny
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Re: RAM 3500 Exhaust brake

Postby BandJCarm » Fri Sep 15, 2017 8:27 am

Daniel.........not sure I understand your question. Are you asking how slow you will go in 2nd gear going down hill? Pretty danged slow in 2nd! In the Rockies on I-40, I never did get below 3rd gear going down, and mostly 4th. I honestly don't know the exact speed in mph for each gear, if that's what you're asking. I outweigh you by a bunch (Truck and Trailer AND belly!! )

I know that I put on disc brakes before that trip because of anal retentive worry over stopping in the hills.......... and while I love them and am glad I have them, I did not NEED them for that one trip. On higher elevations, or longer steep descents, maybe. I just tapped that brake and it downshifted one more time, as needed........always had exhaust brake and tow haul on. I THINK (?) the Rams do the exhaust brake a bit differently.......but I don't think either of them are true Jacob's brakes, really......just aggressive transmission downshifters.

Am I in the ball park????
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Re: RAM 3500 Exhaust brake

Postby RamblinReck » Fri Sep 15, 2017 8:29 am

I use the exhaust brake and tow/haul together. The grade of the hill really matters. But in general what I have found is the exhaust brake will hold the speed at which I lift off of the accelerator pedal on top of the hill. If I want to go slower down hill I will slow down before approaching the peak of the hill. I have tried to downshift and found it was ready in the lower gear. I have not had to hit the brakes, the engine/tranny do all the work.
Works great and brought us down some big big hills in the last couple of weeks.
There may be other ways to manage the EB.. I'm all ears!
How does it work on a big rig?
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Re: RAM 3500 Exhaust brake

Postby Danny & Cheryl » Fri Sep 15, 2017 8:42 am

Our trucks have the Exhaust brake which is a Flapper valve in the exhaust, Big trucks use a Jacobs (Jake) engine brake. big difference. George I went down a 2 mile grade with switch backs and sharp curves without it working, leaving Queen Wilhelmina. glad I have the disc brakes. We are going to Petit Jean state park after the Kansas rally and it has about a 5 mile steep grade when leaving there. The exhaust brake works great on the highway where I really don't need it. and yes I had the tow haul and the ext brake turned on. I was trying to not exceed 10/15 mph going down in 2nd gear.
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Re: RAM 3500 Exhaust brake

Postby BandJCarm » Fri Sep 15, 2017 9:13 am

Why was it not working??????? ??

Maybe y'all need to trade your Fiats for Chevy's!! LOL

Torben, Pete, others............use the manual mode on the steering column. That works great, and allows you total control over the gear you are in. But I've not needed to do that yet. Even at 7,800 feet, coming down, I just tap the brake and it lowers to next lower gear. Bam. And I haven't needed 2nd yet. 3rd is even rare. I am unsure why yours isn't working. Do you have a switch/button for it? I can turn mine on or off with switch on panel. I always turn on exhaust brake AND tow haul mode every time I sit down to drive away.......no matter what or where.

And this is just MHO, but 15 mph is a bit slow for Petit Jean. I've not been to Wilhelmena, but been up Petit Jean 2,000 times..........albeit never with the camper behind me. Maybe I'd eat those words, I dunno. I would imagine that's a 4th gear and 45 mph descent......with 3rd on some switchbacks maybe.

It sure sounds like your exhaust brake is not doing what it's supposed to do.........for some reason.
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Re: RAM 3500 Exhaust brake

Postby wbonta123 » Fri Sep 15, 2017 9:14 am

I don't know if this helps, but I have the Banks electronic brake. It adjusts the torque converter and the vanes in the turbo to slow you down. On steep down grades I set the electronic brake on medium and I may increase in speed by 3 or 4 mph. All I have to do is tap the brake and it helps to slow also. When out west a few years ago we would top a mountain at 55 mph and be doing approx. 60 at the bottom; this was on a long steep grade. This trip in Maine and Nova Scotia we encountered even steeper grades, not uncommon to have several 12% grades. The Banks electronic brake worked great. I never run with it on when on the highway and pretty level ground because the minute you let off of the excelerator it kicks on. If I am entering an exit ramp, I can turn on the Banks and it almost stops us before we get to a stop sign. B.J.

p.s. I always tow in tow-haul mode, my coach has a gross weight rating of 18,000 pounds.
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Re: RAM 3500 Exhaust brake

Postby BandJCarm » Fri Sep 15, 2017 9:59 am

BJ, I was about to cuss you for coming up with another thing I need to spend money on........but there's no application for my vehicle per their website. I wonder if the newer models have something similar built in, and that's the difference maybe???
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Re: RAM 3500 Exhaust brake

Postby Danny & Cheryl » Fri Sep 15, 2017 10:31 am

Bill let me know how it works when you bring your trailer down from Petit Jean, I don't think you can make that sharp curve at the bottom running 45, just saying. thanks guys for the input. Dealer said to bring it in and they would put computer on it. I will do that when we get back from Kansas
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Re: RAM 3500 Exhaust brake

Postby RamblinReck » Fri Sep 15, 2017 10:43 am

Hmmm. I use the exhaust brake all the time and it works for me. Maybe I don't know any better having never had another "system" other than 2 feet on the brake pedal !

Danny, Let us know what the dealer says
George and Ann Marie

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Re: RAM 3500 Exhaust brake

Postby Corn Flakes » Fri Sep 15, 2017 1:39 pm

At 17 mph the exhaust brake cuts out. Last fall went west out of Death Valley to California and on one of the passes my exhaust brake would not hold me in 2nd gear, long and steep. Used up some of my brake pads.
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Re: RAM 3500 Exhaust brake

Postby Danny & Cheryl » Fri Sep 15, 2017 4:17 pm

Doug my manual says that when the exhaust brake is on it will operate automatically when vehicle is moving faster than 5 mph and the driver removes pressure from the accelerator pedal. But from what you are saying that is almost what my truck is doing. Makes me wonder.
Danny & Cheryl and Penny
2005 30RLBS, MORryde IS/Disc Brakes
2015 RAM 3500 Cummins DRW
40 Gal TransferFlow Fuel Tank/Garmin RV760

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