My '98 has 206,000 miles now. it still has the original tranny, I learned from this forum to drain and refill the tranny and avoid do a complete tranny flush. Btw, I am the original owner.
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question: I can't find an answer, is Royal Purple ATF okay to use in these transmissions? I see people mention using M1 and Amsoil ATF, but not Royal Purple.
Really?I don't know about their tranny stuff, but the local guy who is the differential rebuild guru has a bench full of "purple casualty" third members![]()
I've never had an issue with it. Mobil 1 did make the infamous vortec piston slap in my old '07 sierra appear.I use RP in tranny, tcase, and differentials. So far no problem. Knock on wood. I struck a good price with RP. Was cheaper than Mobil1 at the time of purchase.