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Discussion Starter · #1 ·
I own a 2003 Dodge Ram 2500 4X4, 4 door, with cummins diesel (305 HP) and a 11 1/2 inch Limited Slip Differential. The manual that came with the truck states the "if" you have a rear axle made by American Axle Manufacture/AAM, you do not add a limited slip additive to the fliud.
How would you know if your truck has a AAM rear axle ?

TIA...
 

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Give you vin to the parts dept at the dealers and have him run a build sheet.
It should specify what options are on your truck plus check and see if there are any tags on the rear axle.
 

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I have a 2004 4 x 4 and my manual says use 75w/90w synthetic with limited slip additive already in it for my AAM rear axle. I bought the Valvoline brand and it took 3 bottles which I think equals 3 quarts. In the front it says to use the same stuff however my gear guy said to run Lucas 75w/140w heavy duty non synthetic and it took about 2 1/4 quarts. In the front make sure to keep he fluid level about 3/4 of an inch below the filler hole or else your axle or pinion seals will leak.
 

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You show manual trans The 2003 used different axles for the 2 trannies.

Should be the 14 bolt AAM axle. As the other poster said, you can give the VIN to the parts department at a Dodge Dealer to be sure.

I'm a member of TDR as well. 99% sure you have the AAM....

Good Luck

Coolhand
 
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