Can-Am / BRP 75-140 gear oil July 28, 2015 so 75-140 is recommended for the rear diff, i also run it in the tranny, but why not run it in the front? the front calls for 75-90, their basically the same price so why not run the 140 in the front. just stand heat better doesn’t it Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related