- July 8, 1999
- Reaction score
- City, State
- Gaithersburg, Maryland
- Year, Model & Trim Level
- 04 Rubicon w/stuff
Originally posted by 410Fortune
yES AFTER 500 MILES YOU NEED TO CHANGE THE FLUID AND MODIFIER. Also you should not use synthetic gear lube to break in gears.
Yes change after 500 miles
Where does the no synthetics come from? Please dont tell me its too slippery!! When I set my gears up I use synthetics all the time. During run in the gears will create lots of heat- thats the exact type of condition that synthetics excell. Ford fills their rear axles in the 3.73s and up with synthethics since they generate a bit more heat. Most synthetics are LS approved so no need for additive- check with the mfr.
Biggs When you put in the new gears did you just bolt on the ring and install the pinion? You need to run through the complete set up.
I agree with Jon here- I think the pinion preload is screwed + ?. Your pros did they use a dial indicator to get the backlash? Did you or they check the wear pattern?
I would do three things- 1) check the preload on the pinion bearings- 15 INCH lbs if I remember right.
2) put a dial indicator on the ring gear and check the back lash(and runout while its on there)
3) check the wear pattern
I posted a link to setting up the 8.8 on the forum someplace- a quick search should turn it up- if its still available.