Just had our first failure due to low lube level in rear diff. &gt; &gt; &gt; &gt; &gt;<br>This one got thru before we knew about this prob.

 

OK, I saw this posted on the TDR site. Now it makes sense, fill level should be at 3/4&quot; (10.5) or 1/2&quot; (11.5) below fill hole, +/- 1/4&quot;. NOTE this is NOT +/- 1/4&quot; below fill hole as someone stated above (and I poked fun at ).

From TDR post:

American Axles

Dodge Trucks are now using American Axles for 2003 and later. Please make sure your Service Department is using the correct lubricant and adhering to the correct fluid levels.

These axles do not require Friction Modifier, but do require a special synthetic lubricant. According to American Axle, this 75W-90 lubricant part number listed below is a pure synthetic lubricant and does not contain Phosphates. This is different from the 75W-I40 that is used on DANA and Corporate Axles.

Please use Mopar Part # 05102232AA on all American Axles

Caution: Overfilling these Axles may result in lubricant foaming and overheating!

Please adhere to the fill levels described in the vehicle owner's manual or levels listed below.

9.25 Front: 1/4&quot; +/- 1/4&quot; (Total of 1/2&quot; below fill hole)
10.5 Rear: 3/4&quot; +/- 1/4&quot; (Total of l&quot; below fill hole)
11.5 Rear: 1/2&quot; +/- 1/4&quot; (Total of 3/4&quot; below Fall hole)


Reminder
- A break in period of 500 miles is required before towing!
- Afterwards do not exceed 50 MPH for the first 500 miles of towing.

Dana &amp; Corporate Axles
Both of these axles require the 75W-140 Synthetic lubricant available through Mopar Parts when used for towing. (See Owners Manual)