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Thread: M939 Jake Brake and Allison Questions

  1. #11
    4 Star General dmetalmiki's Avatar
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    Aug 2006
    London England
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    Some great knowledge here. Could I impose and ask, Is it possible to have that Allison Transmission " Cease Driving" (as in (Freewheel)) Through operation of the hydraulics, By mechanical means, Like a pedal, (Existing clutch pedal).
    My (Converted) Diamond T 980, Has that Allison Gearbox coupled to a Detroit engine and still retains the original 3 Speed Transfer Case, Which I would rather like to be able to 'Change ratios on the fly'.
    Last edited by dmetalmiki; 10-29-2019 at 16:27. Reason: correction
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