Aftermarket gears?

Not really. Open ignorance isn’t fun. Why in 2025 anyone would think you can’t use synthetics in these boxes is a fool.

I never said it saves parts. But it sure makes them easier to shift.

Since 1979 I’ve been doing it with at least 3 different brands.

But because someone says it can’t be done then it can’t be done.

It’s stupid really.
I use synthetic in my Dana and my motor but not in my tranny.