Differentials

Chest_Rockwell · 02-20-2006, 09:57 PM

I just wanted to check and make sure that I'm doing this right. I'm filling up my front and rear diffs (Dana 30 & 35) with my new Rockcrusher covers on. I'm use to filling up to the bottom of the fill hole, however I'm told that i can't do this with the Rockcrushers because of the excess gear oil blowing out the vent line. I looked at my manual and it says 1.18 liters for the front and 1.66 liters for the rear. This works out to be 1.24 quarts for the front and 1.75 quarts for the rear. Does this sound right? I ended up filling the front 2 quarts and the rear 2.5 quarts.

**Stu Olson** · 02-20-2006, 10:01 PM

Fluid quantities....

http://www.stu-offroad.com/misc/maint.htm

Chest_Rockwell · 02-21-2006, 08:54 PM

Thanks Stu

fried_gold · 02-21-2006, 09:37 PM

I thought you filled to the hole with the rockcrushers as well.. Do they not have instructions or anything?

**CAJUN_YJ** · 02-22-2006, 01:02 PM

Hey Stu, I have a rubi and I'm fixin to replace my front and rear diff oil over to Royal Purple. I know It takes 75-140, but is there an additive LSD in the D44?

**DestructoJr** · 02-22-2006, 01:28 PM

Quote:

Originally Posted by CAJUN_YJ

Hey Stu, I have a rubi and I'm fixin to replace my front and rear diff oil over to Royal Purple. I know It takes 75-140, but is there an additive LSD in the D44?

Any synthetic oil will already have the LSD fricition modifier necessary read the bottle it will tell you its in there

05LJ · 02-22-2006, 04:45 PM

If the new cover increases the volume of the housing then filling it with the factory fill amount may not be enough. Did you mark the side of the housing at the level equal to the bottom of the fill hole for the stock cover? If so fill the differential up to that level regardless of the amount it takes (relative to the factory fill quantity). Many of the aftermarket differential covers have the fill holes located higher on the cover so that you can rotate the differential housing to adjust driveline angle. Thus you can either end up filling the differential up too much (if you haven't rotated the diff.) or, as already stated, if the cover allows for an increased fluid volume and you just add the factory fill amount you may be too low. Just my 0.02

willy peter · 02-22-2006, 05:58 PM

Quote:

Originally Posted by CAJUN_YJ

Hey Stu, I have a rubi and I'm fixin to replace my front and rear diff oil over to Royal Purple. I know It takes 75-140, but is there an additive LSD in the D44?

Rubi's don't need an additive for their LSD's. But yes the RP does have it anyway.

02-22-2006, 01:02 PM	#5
CAJUN_YJ Member Join Date: Jul 2004 Location: louisiana Posts: 267 Profile Gallery Classifieds My Jeeps	oil Hey Stu, I have a rubi and I'm fixin to replace my front and rear diff oil over to Royal Purple. I know It takes 75-140, but is there an additive LSD in the D44?

02-21-2006, 09:37 PM	#4
fried_gold Registered User Join Date: Dec 2005 Location: US Posts: 628 Profile Gallery Classifieds My Jeeps	I thought you filled to the hole with the rockcrushers as well.. Do they not have instructions or anything?