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Old 07-03-2013, 04:20 PM   #1
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Need help possibly dumb question **Rear end related**

I couple of months back I got Detroit Trutracs and 4:10 gears installed front and rear. A couple of days ago I noticed what looked like gear oil leaking from my rear end. The leak isn't bad, small drip when parked for a day or so. I am at my brother's home in VA and decided to check the level to make sure it wasn't low before heading home. I have the Teraflex diff covers, that have to 2 fill holes. I know the lower one is for normal use and the upper is for axles with high pinion angles. Anyway I loosened the lower hole and when I removed it oil flowed oil like it was filled to the top hole. The shop that did the work for me is more of a performance shop than a Jeep shop. So I know the work was done right, they may have just not known about the fill level. So my question is, how bad is it to run with more oil than needed in the rear end? I'd rather wait until I got home, to drain and refill my rear end.

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Old 07-03-2013, 06:33 PM   #2
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One may be a "fill" hole and the other a "full" hole. If the lower plug is at about the height of the bottom of your axle tube (ballpark) that's about the level the fluid should be +\-.

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Old 07-03-2013, 10:58 PM   #3
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I filled both of mine at the top. The leaking on the Tera covers is prob because one of the caps wasn't tightened fully. Mine did the same until I cranked on it.
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Old 07-03-2013, 11:35 PM   #4
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OK thanks, I'll check it again tomorrow and see if it's leaked anymore.
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Terafllex 2.5" Springs and Shocks, JKS Adj. Track Bars
305/70/17 Terra Grapplers/ Pro Comp 7005s 17x9
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Old 07-04-2013, 12:15 AM   #5
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It won't hurt one to run over full as long as you have a vent. Of course you can create oil leaks when running to much fluid, but they allmost allways go away when you put the right amount of fluid in them.
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