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06-03-2017, 07:26 PM
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Registered User
Join Date: Nov 2014
Location: Austin, TX
Posts: 281
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TH350 / NP205 - ATF or 80w-90?
Every manual I've found (from Haynes to original shop) say to use GL-5 80w90 gear lube.
Doing some extensive maintenance on my '72 and found ATF in the transfer case. It didn't look like a mix of ATF/gear oil, so the PO probably put that in. Should I replace with 80w90? And if I have/get a trans rear seal leak, will the ATF affect the GL-5?
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72 K2500 Sierra Longbed Wideside 350/TH350/NP205 66 Plymouth Barracuda 225 Slant6 |
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