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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 2054
Experience:  Owner at DJ Wilson
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2007 M2 freightliner D3000 Allison shifting erratically. Shifting from

Customer Question

2007 M2 freightliner D3000 Allison shifting erratically. Shifting from 3-4 seems like it is slipping and engine revs up then will shift. once in fifth it does not shift into what you would say overdrive. But it doesn't do this all the time. Taken to Allison dealer twice first time replaced solenoid in valve body which corrected it for about 3 weeks then started again. Took back 2nd time and they thought ABS was creating problem so they unhooked ABS from computer so wouldn't interfere with trans communication to BHM. Several thousand dollars later still acting up same problem but starting to shift even more erratically in and out of 2 thru 5 gear. It does not do it on all stop shifting. Comes in spurts?
Submitted: 2 years ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 2 years ago.
Hi I'm Wayne
Thank you for requesting me,
I would try to remove and clean the plug at the computer
my 1st thought was the solenoid on the trans,
but that was replaced, so you have a connection issue,
or the computer itself , I suggest unplug and clean all connections
Customer: replied 2 years ago.
When you say computer are you saying bulkhead module?
Expert:  Wayne replied 2 years ago.
Hi, yes the computer for the Trans

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