synthetic gear lube. Both trannies now have shifting problems like the syncros aren't doing there job. I'll put regular gear lube back in the T18 but what Is best for a NWC T5.
Fluid is too slick for syncro to work. G.M. sells manual transmission & transfer case fluid p/n 88861800 which is Dexron II in a new package.
Got to be careful, some manuals such as NVG4500 (have one in my 2000 K2500) have a very specific fluid, will damage syncros if not used.
