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Allison 4000 TCM (Transmission Control Module) Failures
#1

The Allison shop that replaced my Allison 4000 transmission advised me that the old style TCM is guaranteed to fail.  I took that advice and had them replace it.  Apparently the bonding material between the connector and the body of the TCM fails which causes broken connections internally.  That's the way I understood it.  This place is busy with tow trucks dragging in every kind of truck and busses all day and night.  They had TCM's everywhere I looked and said they commonly replace a dozen a day.

If you have that TCM you may want consider that and do your research.
 
Atlantic Detroit Diesel-Allison, Middletown, CT


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Jim
2014 Newell Coach 1482 Mid Entry 45'8" Valid Slides and Valid Levelling
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#2

Thanks for the heads-up Jim.  I just took a look at mine and it seems to match your new one.  Hope your issues are all solved by now.


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Rob
2016 Newell #1536

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#3

(06-23-2023, 09:55 AM)RobSC Wrote:  Thanks for the heads-up Jim.  I just took a look at mine and it seems to match your new one.  Hope your issues are all solved by now.
Yes, you are golden.  Only remaining annoyance is the failure of E-Z Steer.

Jim
2014 Newell Coach 1482 Mid Entry 45'8" Valid Slides and Valid Levelling
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#4

Is this the old style looked like?


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#5

(06-24-2023, 07:52 AM)afrench Wrote:  Is this the old style looked like?
Yes that is the old style.
   

Jim
2014 Newell Coach 1482 Mid Entry 45'8" Valid Slides and Valid Levelling
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