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Old 01-27-2020, 06:31 PM   #1
truckin 79
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Join Date: Jun 2014
Location: Lvld CO
Posts: 363
Changing rear end fluid posi or not

Did a 79 1/2 ever come with a posi rear end? I need to change gasket and fluid but did not know if I needed to add special posi fluid. I have a big oil sludge hanging under rear end and so I think it is leaking gear oil and needs changed.
79 Chevy 2wd BIG10 350 TH400
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