I've been running Redline for about 2k miles and I am having rough shifts from 4th to 5th and also grinding more often from 2nd to 3rd. I've heard mixed things about which brand works better for the xA and maybe someone here can provide some insight. Also, my 2006 came from the factory with only 1qt instead of 2. Anyone else experience a shortage when gear oil was changed?

 

I have always like Redline the best for gear lube...Amsoil also rocks......RP a close third and yes I have used them all in various applications