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Raypat

allison transmission 3000; ECM fuse blows on hard bumps!!

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3000 on DP;  blows ECM 10 amp fuse on hard bumps . Cummings San Leandro 2015 and Allison Las Vegas 2018 shops humored me . Problem getting worst . 1200 mi. run replaced fuse 11 times in heavy highway too; Sacramento I 5. Any ideas??

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Raypat,

Welcome to the FMCA Forum.

Either a problem in the Allison ECU or just as likely an issue in the wire from fuse box to ECU. 

Before spending too much time diagnosing, I would run a new wire and remove the old one.

If that doesn't address your problem, here is the guy to contact: https://www.transmissioninstruments.com/

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