Hey fellas,

A few months ago I had bought an 03 Dodge Ram 3500HD Laramie 6 spd standard. I recently purchased a product by the name of Power Up NNL 690G. I understand this lubricant when added to differentials and transfer cases is supposed to reduce wear and friction, in the end saving you money in the long run, and well I thought I would give it a try. Anyways, I was wondering if these trucks come with a friction modifier or not, or is it straight 80-90 gear oil in the diffs? Reason I ask is, the fella at power up told me I can't mix this product with any existing friction modifier. I think this rear end is the 3.73 ratio. Any help would be greatly appreciated. Thanks.

Matt

 

No friction modifier. Just Synthetic 90w. If you do a lot of heavy towing you can go with a 140w oil. As long as you use a good synthetic, there is no need for any additives.

 

I'm not sure what year crossed over from Dana to AAM. Dana used a clutch type posi/limited slip. This needs friction modifier.

When Dodge went to AAM, they used a gear type limited slip. No need for friction modifier. Just quality synthetic 90W or 140W gear oil. My preference is to use Lubrication Engineers gear oil. Amsoil or Mobil-1 synthetics are good choices too.

BTW...free bump for someone to give you a good idea of the changeover year from Data to AAM.

Tony

 

AAM was used in 2003 and up 2500 and 3500 trucks.

 

Putting the synthetic 140 in the AAM axles is a way to stop them from chattering. It occurs when hot and starting out with a heavy load or on a hill and the front wheels are turned. I don't know if it makes the limited slip less effective or not.

Friction modifier might do the same thing but it's not normally used in the AAM axles.

 

Alrighty, well that clears up things for me a little more. I'm not entirely sure if mixing the power up product with an oil that has a friction modifier will make much of a difference anyways. I think the only reason the guy at Power up told me this was mainly to cover his butt in case the power up doesn't work at full potential when mixed with the friction modifier. Than again, I'm not a chemist, just another pee-on farmer lol. Anyways, thanks for your help folks.

 

Bruce,

Just keep it simple and use good synthetic 90w with no additive. All is well. The last oil change I did on mine, after about 50,000 miles, the old oil was as clean as the new oil.

 

I actually asked Redline if I should run their no friction modifier oil in the AAM, or just use the regular 75W90 and 75W140 (that comes with friction modifier in it).

They said the AAM system does not require friction modifier, but the modifier is super-slippery and may reduce temps in the gear contact area.

In a nutshell, they said it wouldn't hurt to run the modifier and there may be some benefit.

There were also a few theads when the 03's came out about people getting chattering while turning when running oil with no modifier, even though it isn't supposed to need it.

As far as whether the factory fill contains modifiers, I would say there is a good chance, since it comes in most gear oils, and Dodge's half tons and smaller rigs require it.