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Old 01-29-2020, 12:27 PM   #6
truckin 79
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Join Date: Jun 2014
Location: Lvld CO
Posts: 312
Re: Changing rear end fluid posi or not

I do not have spid had to change glove box doors as hinge was gone. I just assumed most later trucks with be a one legger and no posi. I heard that if you go with Synthetic a person does not need to posi additive. Is this true?
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79 Chevy 2wd BIG10 350 TH400
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