I know I could probably search and find this but hey,,, I'm lazy,,,rotfl On a 2003 Dodge DRW3500 W / 6 speed What is the correct weight lube to run in the transmission and the rear axle,,, I have about 65K on it and should be time to drain,,,right ? Also does the rear require any additive ???? Thanks,
Amsoil reccommends 5W-30 for the NV5600. http://www.amsoil.com/storefront/mtf.aspx Is your AAM 11.5" a limited slip or not? If it is it should need an additive. Amsoil Severe gear already contains the needed additive. 75W-90 http://www.amsoil.com/storefront/svg.aspx It wouldn't hurt to get rid of the factory dyno oil by now. I highly reccommend synthetic oils for your drivetrain. If you have it in all the moving parts of your drivetrain you should see a slight gain in fuel mileage and a smaller percentage of drivetrain loss.
Amsoil reccommends 75W-90 regardless, I'd go with Amsoil before I'd go with Dodge's reccommendations.
i know its the manufacturer, but the owners manual says that the lmited slip axle does not require an additive. but 90% of the gear oil you are going to buy has a friction modifier in it anyway.
Newbie update,, Thanks for the responses,, I went with Royal Purple Syncromax in the trans and their Maxlube 75-90w in the rear axle. Both are synthetic and I immediately noticed a difference in the shifting of the trans,,also saw a jump in the fuel mileage but I also changed the engine oil and air filter at the same time so I don't know how much was due to the lube,, I went with Royal Purple because they are a Houston based company and the lube is easy to get ( no mail order-NAPA stocks it ) and everything I have heard about their products has been good... Thanks again
