2016 CTD 2500 REAR DIFFERENTIAL QUESTION

BTW gear driven LSD is far superior to any clutch system.

CharlesinGA wrote:
Correct (nominal) level is one-quarter inch below the hole, plus or minus one-quarter inch. That means a range from the bottom of the hole to a half inch below it.

Charles

Yeah, I saw that on youtube. One guy made a little L-shaped tool to put in the hole and measure the height. But I also read, "one-quarter inch below the hole, plus or minus one-quarter inch" to mean even with the hole is OK.

Correct (nominal) level is one-quarter inch below the hole, plus or minus one-quarter inch. That means a range from the bottom of the hole to a half inch below it.

Charles

Cummins12V98 wrote:

Ron3rd wrote:

Cummins12V98 wrote:
Highly advise dumping the OE fluid and run AMZ/OIL SevereGear 75–90.

Do you know who has a good price on this lube? Also, it looks like they make this lube both with and without the LS additive, which I don't require.

You can setup your own account. Lots of places like NAPA sell it. You want the Severe Gear.

Got it, thanks.

Ron3rd wrote:

Cummins12V98 wrote:
Highly advise dumping the OE fluid and run AMZ/OIL SevereGear 75–90.

Do you know who has a good price on this lube? Also, it looks like they make this lube both with and without the LS additive, which I don't require.

You can setup your own account. Lots of places like NAPA sell it. You want the Severe Gear.

Cummins12V98 wrote:
Highly advise dumping the OE fluid and run AMZ/OIL SevereGear 75–90.

Do you know who has a good price on this lube? Also, it looks like they make this lube both with and without the LS additive, which I don't require.

Thanks for the info

I have always filled to the point fluid is running out the hole. This is on FLAT surface.

I tow 33-35k combined and use the 75-110 in the rear.

Yup get 4qts. You'll have a little left over.
Book says fill to fill line, 1/2" down from hole or something like that. I wouldn't worry if you get extra in it.
It's to keep oil from filling the axle tubes part way, but the bottom of the hole looks to be right at bottom of axle tube. Never been an issue filling to the hole on any vehicle yet.

Yup get 4qts. You'll have a little left over.