|
09-26-2014, 07:47 PM
|
#1
|
Senior Member
Join Date: Mar 2005
Location: Northern Oklahoma
Posts: 5,062
|
Shifting Allison 3000 to Neutral then Drive
I seem to remember reading someplace that while moving down the road an Allison transmission should not be shifted into neutral, coast for a while, then shift back into Drive. Is this true, and if so what damage does it do?
I've done this many times for different reasons in a regular car and never suffered any problems.
|
|
|
|
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
09-26-2014, 07:53 PM
|
#2
|
Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
|
Actually, if you had pushed the Reverse button by mistake the Allison would not do anything that will cause harm to itself. It most likely would be the same when in Neutral also. I haven't tried it but it may even sound an alarm when that happens, I'm not sure.
Dr4Film ----- Richard
|
|
|
09-26-2014, 08:05 PM
|
#3
|
Senior Member
Join Date: Feb 2010
Location: Sunnyvale, CA
Posts: 1,195
|
I thought the reason is that the Allison takes it's pump drive from the engine and not the driveshaft, so if you are coasting in neutral the driveshaft is turning the gears but the fluid is not pumping. That's also the reason you have to remove the driveshaft before towing (rather than just putting it in neutral).
Steve
__________________
The Green Machine -- 2000 Mountain High Coachworks Summit (Spartan chassis / Cummins ISC)
...and F-Troop: Fearghus, Fiona, and Frankie (Cairn Terriers)
|
|
|
09-26-2014, 08:10 PM
|
#4
|
Senior Member
Join Date: Nov 2005
Posts: 7,396
|
If the engine is running -- would think the "pump" is running. Doubt if putting the tranny in "N" for a short period would hurt anything--but why would you????
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
|
|
|
09-26-2014, 09:21 PM
|
#5
|
Member
Join Date: Aug 2013
Posts: 87
|
Putting it in neutral wouldn't be a problem, putting it in drive while rolling down the road on the other hand would make me nervous though.
I, in my car put it in neutral all the time rolling up to stop lights and signs. You can feel the engine stop pulling the vehicle. The main reason for this is to use less brake pad over time.
The other reason someone would slip it in neutral is called hypermiling. Energy-efficient driving - Wikipedia, the free encyclopedia
coasting down a long grade on a deserted back road with no particular place to go.
Allison 3000 model trannys cost to much for this in my opinion though.
I have no formal training on this subject and this is only my opinion.
your owners manual will probably tell you if it is a good idea or not.
I am in a gas burner right now but it does have an allison tranny but not a 3000 series i'm sure.
__________________
2005 Damon Challenger
2007 HHR toad
|
|
|
09-27-2014, 04:41 AM
|
#6
|
Senior Member
Join Date: Nov 2009
Posts: 2,043
|
NEVER put it in neutral while moving.. Fluid is being diverted in a manner which moving parts have no trans fluid moving to them!
Per your 3000 owners manual:
Quote:
WARNING: DO NOT allow the vehicle to “coast” in
N (Neutral). There is no engine braking in N (Neutral). You
could lose control of the vehicle, causing property damage or
personal injury. Coasting in neutral can cause severe transmission
damage.
|
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
|
|
|
09-27-2014, 07:14 AM
|
#7
|
Senior Member
Join Date: Nov 2005
Posts: 7,396
|
If you are saving brake "pads" or hypermiles with a DP, I think you bought the wrong vehicle??????
__________________
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
|
|
|
09-27-2014, 07:35 AM
|
#8
|
Registered User
Join Date: Mar 2010
Posts: 8,777
|
Quote:
Originally Posted by wagonmaster2
I seem to remember reading someplace that while moving down the road an Allison transmission should not be shifted into neutral, coast for a while, then shift back into Drive. Is this true, and if so what damage does it do?
I've done this many times for different reasons in a regular car and never suffered any problems.
|
Quote:
Originally Posted by Old Scout
If the engine is running -- would think the "pump" is running. Doubt if putting the tranny in "N" for a short period would hurt anything--but why would you????
|
Old Scout
I agree ......(especially with the "WHY WOULD YOU????").
Mel
'96 Safari
|
|
|
09-27-2014, 10:53 AM
|
#9
|
Senior Member
Alpine Owners Club
Join Date: Jun 2003
Location: Ontario, CA USA
Posts: 1,402
|
I do not know why you would want put 30,000 lbs in neutral while moving down the road. In case of an emergency you would loose the engine brake/exhaust brake to help stop 30,000 lbs or the ability to increase speed on that 30,000 lbs. Do forget the toad that you maybe trying to stop or move.
That's just my opinion.
Because we never know when the $*!# is going to hit the fan.
|
|
|
09-27-2014, 02:57 PM
|
#10
|
Senior Member
Join Date: May 2014
Posts: 120
|
The comments I would like to make on this idiotic, absurd, and dangerous practice would not be acceptable on this forum, so I will just use capitals to show that I am shouting at you.
DON'T DO IT!!!
|
|
|
09-27-2014, 06:08 PM
|
#11
|
Senior Member
Join Date: Mar 2005
Location: Northern Oklahoma
Posts: 5,062
|
Quote:
Originally Posted by SteveLevin
I thought the reason is that the Allison takes it's pump drive from the engine and not the driveshaft, so if you are coasting in neutral the driveshaft is turning the gears but the fluid is not pumping. That's also the reason you have to remove the driveshaft before towing (rather than just putting it in neutral).
Steve
|
Thanks for that response Steve. I knew any distance traveled without the engine running at highway speed could damage the tranny, but was wondering about a very short distance. Back many many years ago most mechanics would tell you that towing a vehicle with an automatic could be done for less than 25-30 miles going no faster than 20-25 MPH. But rolling highway speed is another situation. Guess this was one of those questions - I'd probably never do it but what would happen if a condition called for it.
|
|
|
09-27-2014, 07:11 PM
|
#12
|
Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
|
Quote:
Originally Posted by SteveLevin
I thought the reason is that the Allison takes it's pump drive from the engine and not the driveshaft, so if you are coasting in neutral the driveshaft is turning the gears but the fluid is not pumping. That's also the reason you have to remove the driveshaft before towing (rather than just putting it in neutral).
Steve
|
Quote:
Originally Posted by wagonmaster2
Thanks for that response Steve. I knew any distance traveled without the engine running at highway speed could damage the tranny, but was wondering about a very short distance. Back many many years ago most mechanics would tell you that towing a vehicle with an automatic could be done for less than 25-30 miles going no faster than 20-25 MPH. But rolling highway speed is another situation. Guess this was one of those questions - I'd probably never do it but what would happen if a condition called for it.
|
Read about THIS poor soul who had to have his rig towed by a "knowledgeable and qualified" tow operator.
What do you think he is in for when he gets back on the road?
Any opinions?
Dr4Film ----- Richard
|
|
|
09-28-2014, 01:00 PM
|
#13
|
Senior Member
Join Date: Feb 2010
Location: Sunnyvale, CA
Posts: 1,195
|
I would be very unhappy if I was that gentleman. Even if the transmission appears fine, but if it fails 30,000 miles from now (which would be very premature) because of it... going to be a huge bill.
Steve
__________________
The Green Machine -- 2000 Mountain High Coachworks Summit (Spartan chassis / Cummins ISC)
...and F-Troop: Fearghus, Fiona, and Frankie (Cairn Terriers)
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
Similar Threads
|
Thread |
Thread Starter |
Forum |
Replies |
Last Post |
King Dome 3000 - DO NOT BUY
|
f14av8r |
Technology: Internet, TV, Satellite, Cell Phones, etc. |
24 |
06-13-2014 10:19 AM |
Hard Drive for Dish ViP211z
|
smiller |
Technology: Internet, TV, Satellite, Cell Phones, etc. |
12 |
01-11-2014 12:34 PM |
Anthem Test Drive
|
mgosselin |
Entegra Owner's Forum |
27 |
12-19-2013 02:57 PM |
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|