Clunking in 4x4 with hubs locked, in straight line, speed dependent. - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 12-22-2011, 12:09 PM Thread Starter
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Clunking in 4x4 with hubs locked, in straight line, speed dependent.

I've got a clunk in 4x4 with the front hubs (manual) locked. This happens in a straight line and is speed dependent. Any idea what I should be looking at?

'02 F250 7.3 CC/SB, 301k. Boost, EGT, Fuel Pressure Gauges, 4" DP + Magnaflow Exhaust, 75PSI Fass, Fuel Bowl Delete, Bellowed Up Pipes, MB Quart 480 Amp, MB Quart PVI216 Coaxials F&R, Alpine Amp, RF 10" Sub.

Cab off overhaul at 301k. 6.4 Torque Converter, Refreshed 4R100, Powdercoated Oil Pan, 203* Thermostat, Coolant Filter, New ZD11s, Rebuilt Turbo, Complete O-ring replacement.
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post #2 of 6 Old 01-03-2012, 09:23 AM
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When I first bought my truck it clunked as well. The faster I would go in 4x4 the louder and faster the clunk would happen. My front driveshaft was broken.
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post #3 of 6 Old 01-08-2012, 06:37 PM
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possibly front axleshaft ujoints.
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post #4 of 6 Old 01-09-2012, 04:31 AM Thread Starter
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Found the clunk, more info here:

Front Driveshaft Question

'02 F250 7.3 CC/SB, 301k. Boost, EGT, Fuel Pressure Gauges, 4" DP + Magnaflow Exhaust, 75PSI Fass, Fuel Bowl Delete, Bellowed Up Pipes, MB Quart 480 Amp, MB Quart PVI216 Coaxials F&R, Alpine Amp, RF 10" Sub.

Cab off overhaul at 301k. 6.4 Torque Converter, Refreshed 4R100, Powdercoated Oil Pan, 203* Thermostat, Coolant Filter, New ZD11s, Rebuilt Turbo, Complete O-ring replacement.
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post #5 of 6 Old 01-31-2012, 03:06 PM
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axle joints just lock your hubs in then reach back and shake them back and fourth if you can hear the metal on metal sound replace them.
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post #6 of 6 Old 01-31-2012, 03:18 PM
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happened to my brothers a few weeks ago his was the front u joints

2001 xl f350 powerstroke
Stock Automatic
Single cab flat bed
Westin Bullbar
4 in straight pipe to 6 in turnout stacks
Tony wildman 6 pos chip
Napa 6637 filter
Glowshift 3 in 1 guages
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