Hi,

I want to change the fluid in my 4 speed transmission.

Before I did the last change, I had bought Redline MT-90 but then at the
recommendation of my mechanic put in Royal Purple 75W-90 synthetic.

I still have the MT-90 and was wondering what the list's wisdom is
regarding putting it in vs. purchasing Royal Purple 75W-90?

Originally, I had gone to AA Transaxle's website and figured MT-90 would
be best.

https://aatransaxle.com/warranty-information

We recommend Redline MT90 for a break in Gear Oil and then use a name
brand 75/90 synthetic on most transmissions.

Thoughts?

Thanks,
Steve W.