RV Trip Planning Discussions

Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 07-21-2018, 04:30 PM   #1
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
Why no Park on a Class A Motorhome transmission

I am new to Motor-homes and of recent have had visits with grandkids in the RV.
Time to time I have worried "What IF" some one bumps into or being a 'kid' pushes in the parking brake. If my leveling jacks are not down, the RV could roll off?
Any thoughts as to why their is not a P PARK lock in the transmission.
I am thinking the other alternative would be to drain off the storage tank for the brake system?
Same concern making a quick stop at a rest area, buying food / fuel etc. Wouldn't a PARK be a safety feature?


Do you take any precautions for this?
__________________

__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
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!

Old 07-21-2018, 04:40 PM   #2
Senior Member
 
bruceisla's Avatar
 
Join Date: Oct 2012
Location: Bushnell, FL
Posts: 6,249
Quote:
Originally Posted by ronnie_g View Post
I am new to Motor-homes and of recent have had visits with grandkids in the RV.
Time to time I have worried "What IF" some one bumps into or being a 'kid' pushes in the parking brake. If my leveling jacks are not down, the RV could roll off?
Any thoughts as to why their is not a P PARK lock in the transmission.
I am thinking the other alternative would be to drain off the storage tank for the brake system?
Same concern making a quick stop at a rest area, buying food / fuel etc. Wouldn't a PARK be a safety feature?


Do you take any precautions for this?

What motorhome (manufacturer/yr/model) are you referring to?


My old Endeavor and current Newmar with Allison transmissions had a Park (P) on the keypad.
__________________

__________________
2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
bruceisla is online now   Reply With Quote
Old 07-21-2018, 04:54 PM   #3
Senior Member
 
Join Date: Jul 2000
Posts: 1,528
Send a message via Yahoo to rk911
all of our motorhomes have had a ‘park’ selection. what makes you think yours does not?
__________________
'73, Rich, N9DKO
2016 Itasca Suncruiser 38Q
Retired 9-1-1
rk911 is offline   Reply With Quote
Old 07-21-2018, 05:13 PM   #4
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
Quote:
Originally Posted by rk911 View Post
all of our motorhomes have had a Ďparkí selection. what makes you think yours does not?

2013- Now, 2006 Itasca Meridian 36G,


No PARK
__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
Old 07-21-2018, 05:22 PM   #5
Senior Member
 
bruceisla's Avatar
 
Join Date: Oct 2012
Location: Bushnell, FL
Posts: 6,249
Quote:
Originally Posted by ronnie_g View Post
2013- Now, 2006 Itasca Meridian 36G,


No PARK

Ahah! .... yes, the Allison 2500 uses a hydraulic drum brake instead of a Parking Pawl. Obtain the Allison 2500 instructions for details on parking.
__________________
2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
bruceisla is online now   Reply With Quote
Old 07-21-2018, 05:26 PM   #6
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
Allison 2500 uses a hydraulic drum brake instead of a Parking Pawl. Obtain the Allison 2500 instructions for details on parking.



Thanks, I'll look for info
Well I have a 3000, but still looking.....
__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
Old 07-21-2018, 05:43 PM   #7
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
Allison 3000 instructions don't really say the transmission has a Park...
Link is for 3000 & 4000 instructions

Still reading...

http://ddwt.us/Allisson_4000MH_Trans...ers_Manual.pdf



26
PARKING BRAKE
Select
N
(Neutral) and be sure that the parking brake is applied to secure the vehicle
when it is not attended. Always make sure the vehicle’s parking brake system has
been maintained per the manufacturer’s specifications.
TOWING OR PUSHING
The engine cannot be started by pushing or towing. Before pushing or towing a
vehicle, disconnect the driveline, lift the drive wheels off the road, or remove the
axle shafts from the drive wheels. When the axle shafts are removed, be sure to
cover the wheel openings to prevent loss of lubricant and entry of dust and dirt. An
auxiliary air supply will usually be required to actuate the vehicle brake system.
TURNING OFF THE VEHICLE
Always select
N
(Neutral) prior to turning off the vehicle engine.
__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
Old 07-21-2018, 05:51 PM   #8
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
IMO their is no 'park' associated with the transmission?


WARNING:
Vehicle service brakes, parking brake, or emergency
brake must be applied whenever
N
(Neutral) is selected to prevent
unexpected vehicle movement. Selecting
N
(Neutral) does not
apply vehicle brakes, unless an auxiliary system to apply the
parking brake is installed (see Operatorís Manual for the vehicle).
__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
Old 07-21-2018, 05:51 PM   #9
Senior Member
 
Join Date: Apr 2014
Location: On the Road
Posts: 1,580
Cut a short piece of pvc pipe. Then cut a slot out of the side so you can slide it in sideways under the parking brake button. Iíve seen people do this with large dogs.
__________________
2012 Nu Wa 363RSBDA
2016 Ford F-350 Dually 6.7
Duoglide1 is offline   Reply With Quote
Old 07-21-2018, 05:52 PM   #10
Senior Member
 
bruceisla's Avatar
 
Join Date: Oct 2012
Location: Bushnell, FL
Posts: 6,249
Quote:
Originally Posted by ronnie_g View Post
Allison 3000 instructions don't really say the transmission has a Park...
Link is for 3000 & 4000 instructions

Still reading...

http://ddwt.us/Allisson_4000MH_Trans...ers_Manual.pdf



26
PARKING BRAKE
Select
N
(Neutral) and be sure that the parking brake is applied to secure the vehicle
when it is not attended. Always make sure the vehicle’s parking brake system has
been maintained per the manufacturer’s specifications.
TOWING OR PUSHING
The engine cannot be started by pushing or towing. Before pushing or towing a
vehicle, disconnect the driveline, lift the drive wheels off the road, or remove the
axle shafts from the drive wheels. When the axle shafts are removed, be sure to
cover the wheel openings to prevent loss of lubricant and entry of dust and dirt. An
auxiliary air supply will usually be required to actuate the vehicle brake system.
TURNING OFF THE VEHICLE
Always select
N
(Neutral) prior to turning off the vehicle engine.



Yup .... I stand corrected .... it's actually labeled N (neutral) and doesn't use a parking pawl. Step on foot brake, shift to neutral, select parking brake, turn ignition off.


The Allison assumption is that a conventional parking pawl (like a car) will break if the very heavy vehicle is moved or loaded against the pawl on a grade.
__________________
2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
bruceisla is online now   Reply With Quote
Old 07-21-2018, 05:56 PM   #11
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
Quote:
Originally Posted by Duoglide1 View Post
Cut a short piece of pvc pipe. Then cut a slot out of the side so you can slide it in sideways under the parking brake button. I’ve seen people do this with large dogs.
Yep, you are the winner!!!!

Keep It Simple

I would have thought of this, maybe in 3 or 4 years....
__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
Old 07-21-2018, 06:12 PM   #12
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 17,036
Lack of a park pawl in the trans of the larger Class A units with the 3000 + series of Allison transmissions , is probably due to the size of the hub inside the trans and the pin that would be required to guarantee it wouldn't snap off , if the RV decided to start rolling, when the pin was't fully engaged.
Ever placed your car in park; on an incline; then had it roll 5/6" when you release the brake pedal, and stop with a jerk as the pin hits home.
The park pin in most automatic transmissions is about the size of your little finger tip, and I've replaced those, and the engagement hub in a 4,000 lb car because they snapped off.
Imagine the damage a 30 k + motor home would do , and the size of pin/hub it would take to make sure things didn't snap every time , the coach rolled a little to the proper engagement point.
To avoid damaging your car transmission ; set the parking brake , before you shift into park , and release the foot brake.
In your coach you set the park brake , then if you want a secondary , mechanism ; solid rubber wheel chocks.

EDIT: I see Bruce posted the simplified version , while I was away typing , sorry for the duplication.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 07-21-2018, 06:25 PM   #13
Senior Member
 
Join Date: Aug 2013
Location: S. FL
Posts: 165
Then is it safe to assume few Class A's have a parking brake?

I'll be playing with the PVC first chance I get......

Heck in my area, People with standard transmissions have stopped thieves. Apparently the common thief in my area can't drive a standard.

PVC ring might also stump them??
I like the concept of a simple piece of plastic being the solution.

Thanks to all for their input.
__________________
1984-2014, 1984 Hi-Lo Fun Chaser 21', 1972 C-20
2001-2013, 1995 Airstream Excella 34', 2001 F250
2013- Now, 2006 Itasca Meridian 36G, 2014 Jeep GC
ronnie_g is offline   Reply With Quote
Old 07-21-2018, 06:38 PM   #14
Senior Member
 
ThePowells's Avatar


 
Join Date: Mar 2017
Location: Zebulon, NC
Posts: 3,824
Another train of thought.

DIY Parking Brake Lock for Air Brakes
__________________

__________________
Kelly and Jerry Powell with Halo (Lethal White Aussie), Nash the Rat Terrorist, and now Reid, the "Brindle we have no idea puppy"
2017 Thor Quantum W31, Ford E-450, Onan QG4000, Demco Kar Kaddy, Toytoada Prius.
ThePowells is offline   Reply With Quote
Reply

Tags
class a, motorhome, transmission



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why I buy a ďNEWĒ Class A Motorhome! And donít judge as Iíll not budge! WyoFree Class A Motorhome Discussions 136 01-22-2017 10:55 AM
Why do folks get INTO and then OUT OF a Class A Motorhome? WyoFree Class A Motorhome Discussions 73 12-03-2016 01:18 PM
Question: Why Isn't the Class A Motorhome topic broken down into Gas and Diesel? Gamaliel Kid Class A Motorhome Discussions 13 09-19-2016 12:03 PM
Why Choose a Class C over a Class A jomark Class C Motorhome Discussions 59 09-02-2015 10:23 PM
Why, Why, Why? PizzaGuy RV'ing Humor & Crazy but True Stories 7 01-19-2012 06:57 AM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:39 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.