RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Allison Transmission Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-08-2020, 01:40 PM   #1
Member
 
Join Date: May 2019
Posts: 69
Allison 3000 cummins 8.3 dies when shifting into gear.

Once my engine and trans warm up, it want to die when I come to stop lights or shift from neutral to drive or reverse. It could simply be the engine is idling to low, but before I turn it up I wanted to ask. It seems to be pulling sort of harder than I would expect when idling in gear like the transmission is not properly disengaging or something. I mean it starts rolling as soon as I hit D or R. Is this normal? Otherwise it shifts out ok except it will occasionally sort of stall in a gear like it will hang in 3rd until I let off the pedal some, then shift and go on. Thoughts?
__________________

__________________
93 Holiday Rambler Navigator
Fort Smith Arkansas
STRIP 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 06-08-2020, 02:57 PM   #2
Senior Member
 
deandec's Avatar


 
Country Coach Owners Club
Join Date: Jan 2006
Location: Northern California
Posts: 4,533
Your idle should be around 650 rpm, I think.

My rig had lagging shifts. I learned here on the forum that I needed to turn on the ignition key, slowly pump the throttle pedal to the floor and release three times. Then start the engine.

That seemed to reset the "throttle position sensor" and smooth out my subsequent shifts for that travel event.

Having done the 3x sequence several times, I now have very few lagging shift events. Most happen after a dead stop while accelerating up an incline.

If your idle is correct, then I do not know why your engine wants to quite at idle.
__________________

__________________
Dean
1995 38' CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
deandec is offline   Reply With Quote
Old 06-08-2020, 06:09 PM   #3
Member
 
Join Date: May 2019
Posts: 69
Quote:
Originally Posted by deandec View Post
Your idle should be around 650 rpm, I think.

My rig had lagging shifts. I learned here on the forum that I needed to turn on the ignition key, slowly pump the throttle pedal to the floor and release three times. Then start the engine.

That seemed to reset the "throttle position sensor" and smooth out my subsequent shifts for that travel event.

Having done the 3x sequence several times, I now have very few lagging shift events. Most happen after a dead stop while accelerating up an incline.

If your idle is correct, then I do not know why your engine wants to quite at idle.
Thank you, I will check my idle speed, is that in gear or in neutral?
__________________
93 Holiday Rambler Navigator
Fort Smith Arkansas
STRIP is offline   Reply With Quote
Old 06-08-2020, 06:17 PM   #4
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 19,703
That idle speed should be in gear , and on Dodge trucks that used the P-7100 pump , with A/C running .

Not unusual for the tip of the idle stop screw and the contact point, on the throttle arm, to wear and slow the idle .

Yes your coach will move as soon as the trans is in gear , normal , and because the torque converter is designed that way Allison states that idle time in gear will overheat the trans , so if your over five mins stuck in traffic shift to neutral.
Attached Thumbnails
Click image for larger version

Name:	p7100_idle screw.jpg
Views:	7
Size:	190.5 KB
ID:	288816  
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 06-08-2020, 10:42 PM   #5
Member
 
Join Date: May 2019
Posts: 69
Quote:
Originally Posted by Skip426 View Post
That idle speed should be in gear , and on Dodge trucks that used the P-7100 pump , with A/C running .

Not unusual for the tip of the idle stop screw and the contact point, on the throttle arm, to wear and slow the idle .

Yes your coach will move as soon as the trans is in gear , normal , and because the torque converter is designed that way Allison states that idle time in gear will overheat the trans , so if your over five mins stuck in traffic shift to neutral.
Thank you, great info
__________________
93 Holiday Rambler Navigator
Fort Smith Arkansas
STRIP is offline   Reply With Quote
Old 06-09-2020, 06:53 PM   #6
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 19,703
I'll add some personal observation from my time at Dodge , this adjustment; on a P/U ; is a royal PITA ; and on a DP it'll be worse .

ENGINE OFF: Clean the area and mark the screw with ink marker , hold the screw, while you loosen the lock nut , turn the screw 1/4 turn in, tighten the lock nut . Start and warm the engine to full operating temp and check the RPM, in gear dash A/C on.

Unfortunately ; repeat as necessary.

EDIT: Note , if the point of the adjustment screw and the contact point are badly worn even a 1/4 turn may result in too much increase , due to uneven wear and misalignment of the worn parts .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 06-09-2020, 11:20 PM   #7
Member
 
Join Date: May 2019
Posts: 69
Quote:
Originally Posted by Skip426 View Post
I'll add some personal observation from my time at Dodge , this adjustment; on a P/U ; is a royal PITA ; and on a DP it'll be worse .

ENGINE OFF: Clean the area and mark the screw with ink marker , hold the screw, while you loosen the lock nut , turn the screw 1/4 turn in, tighten the lock nut . Start and warm the engine to full operating temp and check the RPM, in gear dash A/C on.

Unfortunately ; repeat as necessary.

EDIT: Note , if the point of the adjustment screw and the contact point are badly worn even a 1/4 turn may result in too much increase , due to uneven wear and misalignment of the worn parts .
Thank you, I will plan on this taking a while.
__________________

__________________
93 Holiday Rambler Navigator
Fort Smith Arkansas
STRIP is offline   Reply With Quote
Reply

Tags
allison, cummins



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
Allison 3000 Shifting in 6th gear majicchuck Allison Transmission Forum 2 09-29-2018 12:09 PM
3000 shifting fine not reading the right gear Nasdaqsam Allison Transmission Forum 6 06-07-2017 10:22 AM
Shifting Allison 3000 RIDER FAN Class A Motorhome Discussions 15 10-20-2016 01:42 AM
Shifting Allison 3000 to Neutral then Drive wagonmaster2 Allison Transmission Forum 12 09-28-2014 01:00 PM
starter battery dies..and dies artro Newmar Owner's Forum 4 08-10-2007 10:37 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 08:27 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×