First Gen Manual 4x4 - GL-4 gear oil options?
Redline MT 75W90 is proving very difficult to find locally.
I found some Royal Purple 75W90 that claims it is fully compatible with both GL-4 and GL-5 standards and will not corrode brass parts.
Are there any other GL-4 options that won't require a specialty order for the differentials, transmission, and whatever goes in the transfer case?
2000 XE V6 4X4 5speed, AC PML, RS5000s, K&N drop-in, AC Idler brace, Yakima kayak rack, Shrockworks Skids, custom sliders.