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  1. S10 / Sonoma
    Howdy folks, I am trying to change the fluid in my differential. 'G80' is present in the glove compartment codes, meaning that I have a G80 differential. Attached here is my rear differential. Btw, this is on a 1999 Chevy S10 LS 4wd with the 4.3 V6 And also, would 75w-90 gear oil with no LS...
  2. Transmission & Rearend
    Hi. From the forum I kinda gather that it is OK (but ideally want to know if it is "good") to use Lucas synthetic 75W-90 in my '02 S-10, 2.2L, 5 spd man, 7.625 or 7.5 differential (not sure which). Is it "good" to use it in this truck? No G80 noted in glovebox sticker. I don't see an LS tag...
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