Tranny Fluid on XB
 

So I replaced my stock tranny fluid at 30k on my box with amsoil 90 weight and am about to do it again at 60k with Mobile 1. Any thoughts on this oil, and how often I am changing it? I figure 2 quarts on a a tranny that is spinning at 4k at 80 needs to be changed regularly. thanks guys!

thanks for posting this im about to do mine and im not sure what is the best to use. synthetic for sure but not sure what one there are so many options now.

yeah good post... i didnt change my tranny fluid till 52k... bad part on my end!!!!

so what did you use? my shifting is not as smooth as i would like im wondering if any paticular type of fluid would help this any?

The factory fluid was not great stuff but Amsoil and Mobile 1 should not need changing that often unless you are considering Mobile 1 an upgrade.