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 Allison 3000, Violent and Erratic shifting		  New Topic  Reply to Topic
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Fastback
Top Member

1500 Posts
Posted - 03/05/2018 :  09:47:23 AM  Show Profile  Reply with Quote
3000 Allison in a 2011 IC bus shifts scary violently and erratically. Pushing the up down arrows on touch pad shifter five times and I get "d1 --", I assume that means no codes?

Thomasbus24
Administrator

USA
4544 Posts
Posted - 03/05/2018 :  09:49:56 AM  Show Profile  Reply with Quote
Do you have a twin bus you could swap TCM's with and see if the issues follow? I only ask because twice this year we have seen downright bizarre issues caused by faulty TCM's.
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Fastback
Top Member

1500 Posts
Posted - 03/05/2018 :  10:03:58 AM  Show Profile  Reply with Quote
This is the only bus we have with the 3000 transmission.
Why yes, the ORIGinal CHARGER is a Fastback
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Thomasbus24
Administrator

USA
4544 Posts
Posted - 03/05/2018 :  12:05:45 PM  Show Profile  Reply with Quote
Doh!
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tigger2
Advanced Member

USA
469 Posts
Posted - 03/05/2018 :  3:47:16 PM  Show Profile  Click to see tigger2's MSN Messenger address  Reply with Quote
Do you hav Allison software? You can go onto action requests and reset adaptive shift parameter to see if that works, also look at throttle position percentage to see if it erratic as well.
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Fastback
Top Member

1500 Posts
Posted - 03/06/2018 :  10:43:45 AM  Show Profile  Reply with Quote
No Allison software here.

I did leave the battery cables disconnected overnight and now it seems to shift fine.........
Why yes, the ORIGinal CHARGER is a Fastback
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Fastback
Top Member

1500 Posts
Posted - 04/13/2018 :  05:16:06 AM  Show Profile  Reply with Quote
Shifted fine till yesterday now back to violent and erratic shifting
Why yes, the ORIGinal CHARGER is a Fastback
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1Dieselman
Active Member

28 Posts
Posted - 04/13/2018 :  10:29:41 AM  Show Profile  Visit 1Dieselman's Homepage  Reply with Quote
Sounds like Tcm to me but have you tried a different output shaft speed sensor
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Fastback
Top Member

1500 Posts
Posted - 04/13/2018 :  11:13:48 AM  Show Profile  Reply with Quote
No but I did remove it to check and see if tone wheel was loose on shaft.
Why yes, the ORIGinal CHARGER is a Fastback
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Fastback
Top Member

1500 Posts
Posted - 04/17/2018 :  11:55:39 AM  Show Profile  Reply with Quote
Replaced TCM today, so far so good.
Why yes, the ORIGinal CHARGER is a Fastback
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