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88 Automatic Transmission problem

kolk88

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kolk88 New Member

kolk88

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I have an 88 GMC 4x4 2500 w/ automatic OD trans. When I put it in reverse sometimes I hear a high pitched gear grinding noise, almost like the linkage is not quite fully engaged. I've checked the linkage, no problem, along with 2WD and 4WD operation, no problem, any suggestions as to the cause?

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