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Re: 12 bolt help
I had a slight howl in my rearend the entire time I have had my truck. I had a posi installed this week and the mechanic checked and replaced a bad pinion bearing. The howl is gone. So that may be your issue.
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1970 Gmc Grande Sierra Swb 2wd LS X (LQ4/4L80e)
1990 K1500 Daily
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