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Old 06-23-2008, 06:02 AM
Alfacliff Alfacliff is offline
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Join Date: Jul 2005
Location: augusta ks.
Posts: 1,687
a series of thumps, about 4 ususally, indicates driveline problemns, my 74 did this in first and sometimes in second under heavy load. I had it in the shop to replace u joints, and the rubber doughnut. they also replaced the carrier bearing, and rear transmission mount and the thumps went away. not too sure whitch it was, just glad its gone.
cliff
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