Guys, I had a “crunchy gear” issue that I thought I resolved with servicing both front and rear diffs, with new fluid, upgrading to FID diff housings, and finding and replacing an exploded bearing on the front input gear. I did have trouble where I eventually had to remove the shims from the case housings so all gears would rotate smoothly. (Diff would not rotate smoothly with the housing shims front/rear). After all that and new bearings and shims on both input gears, I still have loud “crunching” under load. Anyone have these issues? Also, can someone advise me on shimming the input gear?