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Been Deleted
Active Member

USA
28 Posts
Posted - 10/16/2015 :  12:11:48 PM  Show Profile  Reply with Quote
2006 BlueBird A3RE Cat C7 Allison 3000 series

The bus lunges when shifting from 3L to 4L. no codes, trans health shows okay, fluid is good.
Any suggestions?

Been Deleted
Active Member

USA
28 Posts
Posted - 10/20/2015 :  05:34:46 AM  Show Profile  Reply with Quote
Changed the front and rear speed sensors, no change.
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RonF
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867 Posts
Posted - 10/20/2015 :  07:04:26 AM  Show Profile  Reply with Quote
if it's and Allison 1000/2000 series, then it sounds like a sticking spool valve in the valve body. Just had on do basically the same thing. I took it apart and cleaned everything and it still did it. We bought a complete remain valve body, $600. Everything is perfect now.
US Army retired CMBT
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Been Deleted
Active Member

USA
28 Posts
Posted - 10/20/2015 :  08:47:57 AM  Show Profile  Reply with Quote
its a 3000, would it be the same?

quote:
Originally posted by RonF

if it's and Allison 1000/2000 series, then it sounds like a sticking spool valve in the valve body. Just had on do basically the same thing. I took it apart and cleaned everything and it still did it. We bought a complete remain valve body, $600. Everything is perfect now.
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