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10-27-2014, 06:44 AM
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#1
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Registered User
Monaco Owners Club
Join Date: Oct 2006
Posts: 1,603
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Leaving tranny in gear while parked
Our allison tranny does not have a park position only neutral. Coach has hydraulic brakes with a normal spring parking brake. Occasionally when parking after applying the parking brake with tranny in neutral it will release on its own ( probably because I didn't push hard enough with foot) . So now I use a wheel chock everytime I stop. Just wondering if Ieaving tranny in gear would prevent coach from rolling in the event of the parking brake disengaging.
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10-27-2014, 06:51 AM
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#2
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Senior Member
Join Date: Jul 2014
Posts: 35,349
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Leaving an automatic in gear won't do anything to hold it back, the torque converter drains and the clutch's need pressure from the pump to engage.
Get the parking brake fixed before you roll into something. You could roll over yourself, while placing the chock!!
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10-27-2014, 07:23 AM
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#3
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Senior Member
Join Date: Feb 2012
Location: Aiken,SC
Posts: 1,025
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Quote:
Originally Posted by twinboat
Leaving an automatic in gear won't do anything to hold it back, the torque converter drains and the clutch's need pressure from the pump to engage.
Get the parking brake fixed before you roll into something. You could roll over yourself, while placing the chock!!
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Good answer & Good advice
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Good Sam Life Members
Served in U.S.A.F.
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10-27-2014, 02:45 PM
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#4
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Senior Member
Damon Owners Club
Join Date: Jul 2010
Location: Annapolis,MD
Posts: 1,458
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Plus Allison recommends not leaving it in gear when
stopped, not even at traffic lights !
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10-27-2014, 02:46 PM
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#5
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Registered User
Monaco Owners Club
Join Date: Oct 2006
Posts: 1,603
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Im not sure there is a problem with the parking brake as much as the operator not using it properly.. But I agree and thankyou for the
advice. I will make sure the brake is working as it should.
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10-27-2014, 04:18 PM
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#6
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Feb 2000
Location: San Jose, Ca, USA
Posts: 2,693
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Quote:
Originally Posted by macandphyl
Plus Allison recommends not leaving it in gear when
stopped, not even at traffic lights !
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So, every time you come to a stop light you're supposed to shift it into neutral? I don't buy that!
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Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2020 Jeep Gladiator Sport S or a 2022 Jeep Wrangler Unlimited (JLU) Sport S
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10-27-2014, 04:30 PM
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#7
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 5,927
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Quote:
Originally Posted by macandphyl
Plus Allison recommends not leaving it in gear when
stopped, not even at traffic lights !
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Can you please post the manual and page number that states that.
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1998 Pace Arrow 35 ft. F53 Ford V10 2014 Honda CRV toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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10-27-2014, 04:41 PM
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#8
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Senior Member
Join Date: Aug 2013
Location: Cincinnati, OH
Posts: 849
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Automatic trans does not have a solid coupling like manual trans does. The hydraulic coupling of the torque converter would allow slip when engine is not running. Plus the rest of the internal bands and clutch packs inside have no hydraulic pressure to hold them engaged.
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2005 Kenworth Showhauler truck conversion. sold .
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10-27-2014, 04:44 PM
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#9
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Senior Member
Monaco Owners Club Vintage RV Owners Club Nor'easters Club
Join Date: Aug 2014
Location: Upstate New York
Posts: 5,807
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I drove school buses with Allisons for over 10 yrs and we weren't ever told to put in neutral when stopped,we do now but its a federal suggestion for safety when crossing kids maybe thats whats refered to.
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Terry and Eleanor
79 32' AMF Skamper 5th Wheel Toy Hauler
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10-27-2014, 04:51 PM
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#10
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Senior Member
Join Date: Apr 2014
Location: On the Road
Posts: 1,608
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Quote:
Originally Posted by Alan_Hepburn
So, every time you come to a stop light you're supposed to shift it into neutral? I don't buy that!
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Mine will start to get very warm if the lights are long or if it takes multiple lights to get thru the intersection. If I have that kind is situation I also utilize neutral.
2005 Country Coach Inspire, C9 CAT
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2012 Nu Wa 363RSBDA
2016 Ford F-350 Dually 6.7
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10-27-2014, 06:19 PM
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#11
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,655
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Page 45 of the Allison automatic transmission operator manual: Use
N(Neutral)for the following:
"To operate the engine at idle for more than 5 minutes".
I do not hesitate to shift into neutral and set parking brakes when expected wait times are 5 minutes or longer. The time to shift back into Drive and release parking brakes is less than 30 seconds.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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10-28-2014, 09:45 AM
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#12
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Senior Member
Join Date: Aug 2012
Location: Noblesville, IN
Posts: 331
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Not many stoplights are 5 minutes...
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2005 Country Coach 40 foot Inspire 330
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10-28-2014, 05:04 PM
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#13
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Senior Member
Join Date: Sep 2012
Posts: 1,177
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Quote:
Originally Posted by Alan_Hepburn
So, every time you come to a stop light you're supposed to shift it into neutral? I don't buy that!
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yeah thats what the g solenoid is for in the VB
when at a red light/stoped the TCM sees lower RPMs and cuts line PSI to help MPG and harder idling
this was added in allison 1000 and 2100 in 2004 and was part of there last updates befor going to the newer 6 speeds
not sure when this was added to the 3000 up units
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