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Old 11-08-2011, 07:09 PM   #1
rjpark36's Avatar
Join Date: Jun 2011
Location: League City, TX
Posts: 333
Changing the Differential Fluid Tomorrow, Questions

Posted this in the General Discussion Forum, but thought I might get some more TJ-specific answers here:

Changing the diff. fluid on my own for the first time tomorrow morning, and was wondering about fluid temp before changing. I always run my 99 TJ Sport at least around the neighborhood a couple times to get the oil warm before changing as the heat thins it out a bit and helps to get the oil to drain more easily. Should I do the same for the diff. fluid, as it is an even more viscous fluid than the 10w30? If so, how long should I run in 4wd to get the front warmed up enough? Is a trip or two around the neighborhood sufficient, or does it need more than that since it is so thick? Also, I haven't checked the repair manual yet. Does anyone know off the top of their head how much gear oil the Dana 30 and 35 take?

Thanks to all in advance!

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Old 11-08-2011, 07:15 PM   #2
MikalCarbine's Avatar
Join Date: Aug 2009
Location: Bloomfield, CT
Posts: 1,191
It wouldn't hurt but unless its below freezing I wouldn't bother, just crack the pumpkins and let it drain for a good amount of time and then clean it up real nice

For oil, your information lies in here
2002 TJ Sport 4.0
33x12.5r15 MTZ
3" AEV/OME lifted

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