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School Me on the Big 'Uns |
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CrestonM ![]() Orange Level ![]() ![]() Joined: 08 Sep 2014 Location: Oklahoma Points: 8455 |
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I too have heard a similar story. I heard the 731 ci in the 4W-305 was a "detuned" 844 from the HD21. Makes you think they could have easily boosted the hp in future models, providing the drivetrain could hold up.
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grinder220 ![]() Orange Level ![]() Joined: 11 Jan 2012 Location: Clinton Iowa Points: 2372 |
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The weak point in the 8550-4w305 is the dropbox input shaft, transmission main shaft and the coupler between the two. The splines wear down and eventually strip out from the sudden shock load of using the power director and the gear on the dropbox input shaft has the tendency to start chipping away also.
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