Exhaust brake operation on 2014 5500

[Rick33]

Normal operation cuts out the exhaust brake at 35 mph when slowing down. This creates a problem when going down steep grades with a trailer. Has anybody found somebody that can fix this?
Thanks

 

[lpennock]

Are you in Tow/Haul?

 

[Wiredawg]

Which transmission do you have AND which ring and pinions do you have? My 2017 Ram 5500 C&C Aisin with 4.88s EB is engaged all the way down to 11 MPH in TH and towing 20KLb + 5er. I think the EB will stay engaged down to 1,100 engine RPMs before it releases. I owned a 2009 Ram 4500 C&C Aisin with 4.44s, but don't remember how low RPMs/speed it would stay engaged.

Cheers, Ron

 

[Ltngdrvr]

Normal operation cuts out the exhaust brake at 35 mph when slowing down. This creates a problem when going down steep grades with a trailer. Has anybody found somebody that can fix this?
Thanks

Yeah, either use tow/haul so it automatically downshifts when slowing, or manually downshift, to keep the rpm's up so the brake continues to work.

 

[kthaxton]

Assuming C&C's operate the same as the pickups, the e-brake deactivates at a specific engine RPM (about 1100-1200 rpm) not speed. As others have mentioned, if you shift down either manually or by using tow/haul, it will shift down and give you braking to a much lower speed.

 

[Wiredawg]

Assuming C&C's operate the same as the pickups, the e-brake deactivates at a specific engine RPM (about 1100-1200 rpm) not speed. As others have mentioned, if you shift down either manually or by using tow/haul, it will shift down and give you braking to a much lower speed.

It is RPMs, but the lower (numerically higher) pinions see higher RPMs at lower speeds. If he has a standard, no sure if EB is tied to RPMs, maybe depressing clutch disengages it?

Be curious what transmission and pinions OP has.

Cheers, Ron

 

[RammerJam]

I thought the torque converter had to be locked for the EB to work? Don't see how it could work otherwise. If T/H does that, that would make sense.

 

[kthaxton]

I thought the torque converter had to be locked for the EB to work? Don't see how it could work otherwise. If T/H does that, that would make sense.

That is correct, the TC must be locked, but which post are you referring to? I'm not sure in which scenario you are thinking it is unlocked.

 

[Wiredawg]

I think the engage conditions all line up: EB button engaged, 1100+RPMs, TQ converter locked 2nd gear and above, foot off the accelerator if Full EB, tap brake if Auto EB. Then whatever speed that happens to be in second gear, depends on what pinions you have, mine likley have the lowest speed with EB engaged as I have 4.88s. I think I said it right, but always opent to opinons/corrections.

Cheers, Ron

 

[RammerJam]

That is correct, the TC must be locked, but which post are you referring to? I'm not sure in which scenario you are thinking it is unlocked.

Many of them, actually. People are referring to engine RPMs and I'm not sure that's what it's all about. I think it has to do with when the TC disengages.

If T/H affects TC Lockup, then it makes a ton of sense that the EB would pull the truck down to -- Whatever.

Mine now pulls me down to 24MPH without it being in T/H (not stock). I'm afraid to engage T/H because I don't want my head slamming against the steering wheel if it pulls the truck down any slower.

I don't know about a 5500 especially since it's a '14. Did they even have an automatic EB setting? I would think it would be setup differently because those things are work horses.

 

[Wiredawg]

Many of them, actually. People are referring to engine RPMs and I'm not sure that's what it's all about. I think it has to do with when the TC disengages.

If T/H affects TC Lockup, then it makes a ton of sense that the EB would pull the truck down to -- Whatever.

Mine now pulls me down to 24MPH without it being in T/H (not stock). I'm afraid to engage T/H because I don't want my head slamming against the steering wheel if it pulls the truck down any slower.

I don't know about a 5500 especially since it's a '14. Did they even have an automatic EB setting? I would think it would be setup differently because those things are work horses.

I think we were typing at the same time... I think my post mostly matches yours...I dont know what year first started equipping Smart EB in the C&Cs, but only matters if you're trying to line up the more obvious conditions that have to be met for EB to engage. Auto EB part only applies if you have it, but I think we're pretty much on the same page... If not towing, TH never on so way too harsh with my EB, which is always on... I turned it off when driving in snow in the NW, but we dont get it very often in San Antonio TX.

Cheers, Ron

 

[kthaxton]

Many of them, actually. People are referring to engine RPMs and I'm not sure that's what it's all about. I think it has to do with when the TC disengages.

If T/H affects TC Lockup, then it makes a ton of sense that the EB would pull the truck down to -- Whatever.

Mine now pulls me down to 24MPH without it being in T/H (not stock). I'm afraid to engage T/H because I don't want my head slamming against the steering wheel if it pulls the truck down any slower.

I don't know about a 5500 especially since it's a '14. Did they even have an automatic EB setting? I would think it would be setup differently because those things are work horses.

The only thing I can tell you for certain, every single time I watch the RPM's while decelerating.....the EB disengages between 1100-1200 under all circumstances.

 

[gsbrockman]

The only thing I can tell you for certain, every single time I watch the RPM's while decelerating.....the EB disengages between 1100-1200 under all circumstances.

Same here........for all four 6.7L trucks I’ve owned. EB disengagement is RPM based on the automatic equipped trucks. And......we still don’t know if the OP has a G56 or AS69RC.

 

[Ltngdrvr]

Same here........for all four 6.7L trucks I’ve owned. EB disengagement is RPM based on the automatic equipped trucks. And......we still don’t know if the OP has a G56 or AS69RC.

The OP hasn't bothered to come back and make a new comment or acknowledge any of these responses to his original post.