deleted-2
undisclosed
Senior Member
Joined: 04/15/2013
View Profile
Good Sam RV Club Member
|
Taco wrote:
There are plenty of 5th wheel rvs outside the manufacturers rated capabilities of your truck.
Ah yeah,
Thanx for setting me straight.
![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/sleep.gif "sleep")
|
JIMNLIN
Oklahoma
Senior Member
Joined: 09/14/2003
View Profile
|
waynec1957 wrote:Ok fellas, help me out here.
I'll take a shot at it.
From around '04.5 the Dmax uses a VVT (variable vane turbo) that restricts air through the turbo and acts as a exhaust brake. Programmed with the Allison which keeps the TC clutch locked which stops the slippage in the TC. Early models were called grade braking but were very weak when compared to a actual exhaust brake. The new '10 ?? and up Dmax/A with the VVT uses a very aggressive program and is at the top with the Dodge in turbo exhaust braking.
As far as I know the 6.0 gasser doesn't use or advertise a grade braking feature.
This from a engine braking wiki;
The term engine braking usually refers to the braking effect caused by the closed-throttle partial-vacuum in petrol (gasoline) engines when the accelerator pedal is released. While some of the braking force is due to friction in the drive train, this is negligible compared to the effect from the vacuum.
When the throttle is closed, the air flow to the intake manifold is greatly restricted. The concept can be illustrated by the amount of effort required to blow/suck through a thin tube vs. a thicker one. It is the work the engine has to do against this restricted air flow that provides the braking effect.
Who advertises a smart exhaust brake ?? I've heard of smart brake and a speed brake.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides
|
Taco
VA
Senior Member
Joined: 11/17/2002
View Profile
 Offline
|
Thats_Ok wrote:Taco wrote:
There are plenty of 5th wheel rvs outside the manufacturers rated capabilities of your truck.
Ah yeah,
Thanx for setting me straight.
you are the one that said. I have a diesel dually. I can tow anything. If you already knew you were wrong why open your mouth.
|
deleted-2
undisclosed
Senior Member
Joined: 04/15/2013
View Profile
Good Sam RV Club Member
|
Taco wrote:
you are the one that said. I have a diesel dually. I can tow anything. If you already knew you were wrong why open your mouth.
Is that what I typed?
...or is that what you read?
Why do you want to start something with me?
What did I do to you?
* This post was
edited 04/26/13 04:02pm by an administrator/moderator *
|
Taco
VA
Senior Member
Joined: 11/17/2002
View Profile
Offline
|
Thats_Ok wrote:Taco wrote:
you are the one that said. I have a diesel dually. I can tow anything. If you already knew you were wrong why open your mouth.
Is that what I typed?
...or is that what you read?
Why do you want to start something with me?
What did I do to you?
Lets put it this way. Suggest on this site that you want to purchase a drv suites 43 ft 5er (or any other "high end" 5er or large toyhauler) and tow it with your ram 3500 and I bet you dollars to donuts you get told you need to upgrade.
Nothing against you personally it is the diesel truck owners attitude of "I got a diesel engine that makes it just like a big rig I can tow it all"
|
|
|
deleted-2
undisclosed
Senior Member
Joined: 04/15/2013
View Profile
Good Sam RV Club Member
|
Taco wrote:
Nothing against you personally it is the diesel truck owners attitude of "I got a diesel engine that makes it just like a big rig I can tow it all"
Heard and understood.
Many variables come into play when talking RV's and towing.
I can agree about the "I have a diesel" mindset.
No worries here.
|
waynec1957
North Central Indiana
Full Member
Joined: 06/25/2009
View Profile
Offline
|
JIMNLIN wrote:waynec1957 wrote:Ok fellas, help me out here.
I'll take a shot at it.
From around '04.5 the Dmax uses a VVT (variable vane turbo) that restricts air through the turbo and acts as a exhaust brake. Programmed with the Allison which keeps the TC clutch locked which stops the slippage in the TC. Early models were called grade braking but were very weak when compared to a actual exhaust brake. The new '10 ?? and up Dmax/A with the VVT uses a very aggressive program and is at the top with the Dodge in turbo exhaust braking.
As far as I know the 6.0 gasser doesn't use or advertise a grade braking feature.
This from a engine braking wiki;
The term engine braking usually refers to the braking effect caused by the closed-throttle partial-vacuum in petrol (gasoline) engines when the accelerator pedal is released. While some of the braking force is due to friction in the drive train, this is negligible compared to the effect from the vacuum.
When the throttle is closed, the air flow to the intake manifold is greatly restricted. The concept can be illustrated by the amount of effort required to blow/suck through a thin tube vs. a thicker one. It is the work the engine has to do against this restricted air flow that provides the braking effect.
Who advertises a smart exhaust brake ?? I've heard of smart brake and a speed brake.
Thanks for the info on the Duramax/Allision. I sort of had the idea that when towing on a downhill grade if you take your foot off the accelerator the engine created some sort of backpressure (for lack of a better word) which combined with the software works with the transmission to keep the vehicle from speeding up. I know that’s not very technical, but if I’m understanding you correctly that’s more-or-less what happens.
As far as the gasser and the “Automatic Grade Braking” feature, I got that from the Chevrolet “build your own” website. When you get to the point where you choose the engine/transmission this below is how they describe the standard HD transmission:
6-speed automatic heavy-duty transmission
The standard equipment on Silverado® 2500HD, this 6-speed automatic heavy-duty transmission handles the power of the Vortec® 6.0L V8 engine. Electronically controlled Tow/Haul mode and Automatic Grade Braking to help you control those heavy loads.
This is how they describe the Allison 1000:
Allison® 1000 6-speed automatic transmission
With over a decade on the job, the legendary heavy-duty Allison® 6-speed transmission harnesses the power of the available Duramax® 6.6L Turbo-Diesel V8 engine.
Includes:
• Driver Shift Control (DSC), which allows the driver to manually select upshifts and downshifts with buttons on the column shifter
• Tow/Haul mode reduces shift cycling for better control and improved cooling when towing or hauling heavy loads
• Automatic Grade Braking uses the engine and transmission to slow the vehicle on downhill grades and help reduce brake wear (operates in Tow/Haul mode)
The durable Allison 6-speed puts you in control of all the intensity Duramax throws out. It requires the available Duramax 6.6L Turbo-Diesel V8 engine.
The both use the term Automatic Grade Braking, which is where I’m confused.
As far as the term “smart exhaust brake”, I thought that was a standard term for GM. “Smart exhaust brake feature on 6.6L Duramax turbo diesel that provides greater control on grades and reduced brake pad wear”. http://media.gm.com/media/us/en/gmc/vehicles/sierra_hd/2013.html
This is all new to me—this diesel thing. I’m on my 8th pickup since 1979 and they’ve all been gas motors. I’m seriously considering a diesel because we’re getting to the stage in life where we can pull the camper more (farther) and the extra power is appealing. But two things scare me, (1) my lack of knowledge about diesels and (2) the extra $8 grand for the DMax/Allison. That’s why I’m here asking questions.
2013 Chevy Sliverado 2500 HD LS Crew Cab
Duramax/Allison, HD Tow Package, GCWR 24,500
2017 KZ Sportsmen S330 IK
|
45Ricochet
North Idaho
Senior Member
Joined: 09/04/2009
View Profile
Good Sam RV Club Member
|
![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/biggrin.gif "biggrin") You can ALWAYS tell when Marty has some free time, this train wreck gets opened
2015 Tiffin Phaeton Cummins ISL, Allison 3000, 45K GCWR
10KW Onan, Magnum Pure Sine Wave Inverter
2015 GMC Canyon Toad
Previous camping rig
06 Ram 3500 CC LB Laramie 4x4 Dually 5.9 Cummins Smarty Jr 48RE Jacobs brake
06 Grand Junction 15500 GVWR 3200 pin
|
blt2ski
Kirkland, Wa
Moderator
Joined: 03/15/2001
View Profile
Offline
|
That is why this thread stays open! keep the bs out of the rest of the forum.........lolol
Marty
92 Navistar dump truck, 7.3L 7 sp, 4.33 gears with a Detroit no spin
2014 Chevy 1500 Dual cab 4x4
92 Red-e-haul 12K equipment trailer
|
JIMNLIN
Oklahoma
Senior Member
Joined: 09/14/2003
View Profile
|
waynec1957 wrote:This is all new to me—this diesel thing. I’m on my 8th pickup since 1979 and they’ve all been gas motors. I’m seriously considering a diesel because we’re getting to the stage in life where we can pull the camper more (farther) and the extra power is appealing. But two things scare me, (1) my lack of knowledge about diesels and (2) the extra $8 grand for the DMax/Allison. That’s why I’m here asking questions.
Thanks, I'm not current on GM new advertising logo's.
If the better fuel millage is appealing and the 8k for the Dmax is a big hurdle and new truck price created sticker shock have you thought about a used Dmax ??
If you know how to put fuel in the tank with the green diesel nozzle owning a diesel is no different than a comparable big block gasser. My particular Cummins has been cheaper to operate and maintain than a comparable big block gas engine.
I check in once a month or so as gasser boyz description of owning a diesel is always entertaining .
|
|
|
