Changed out oil on H55 tranny, transfer case, and rear diff. 212,749 miles using 5 gallon 75-90 Napa gear oil with cap pump. Very easy.
3rd oil change for newish H55, oil very clean
3rd oil change for rebuilt transfer case, oil had lil shine - found the front output shaft has some play with all new Koyo bearings; will tighten stake nut to attempt a fix - doesn’t impact anything unless I use 4wd
1st oil change for rear diff with new 4.11 gears and arb locker. Plenty of shine due to break in.
Will change again in 500 miles along with 3rd change for the front diff with newish 4.11 gears (it was changed 6-8 mos prior to rear)
3rd oil change for newish H55, oil very clean
3rd oil change for rebuilt transfer case, oil had lil shine - found the front output shaft has some play with all new Koyo bearings; will tighten stake nut to attempt a fix - doesn’t impact anything unless I use 4wd

1st oil change for rear diff with new 4.11 gears and arb locker. Plenty of shine due to break in.
Will change again in 500 miles along with 3rd change for the front diff with newish 4.11 gears (it was changed 6-8 mos prior to rear)