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crcr's avatar
crcr
Explorer
Jun 17, 2014

Transmission additive good for 2004.5 Dodge Ram Auto Trans?

A few months ago, I bought a 2004.5 Dodge Ram, 5.9L Cummins diesel, one owner, which now has 140K on the clock. I have some of the maintenance records, but not all. As best I can tell, I don't believe the automatic transmission has ever been rebuilt. Anyone who knows these trucks knows that the auto transmission in these trucks needs to be treated carefully to make it last a long time. I would like to stretch the life of the trans as long as I can. The truck came with a Bully Dog Tuner, but I never put the tuner on the higher levels -- just the lowest or the next setting up, "Tow". I never run the truck hard, but I do tow a 7500 lb travel trailer, sometimes in extreme Southern AZ summer temps. And the previous owner towed a fifth wheel RV with the truck.

I have been using Lucas Fuel Treatment in the truck plus our car, and think it may be helping fuel mileage. These Lucas products all seem to have a top notch reputation. So I am considering adding one of two products: either the Lucas 10009 Transmission Fix, or Lucas Automatic Transmission Conditioner to the auto trans. I had the trans fluid and filter changed when I bought the truck a few months ago, so I would have to drop a little bit of auto trans fluid to add the Lucas product.

My question is, do you all think adding either of these products as a precaution for my transmission is a good idea? If so, which of the two products would anyone recommend? Or a recommendation for a different transmission additive product? The Lucas transmission additive only costs $12 so if there is even a chance that it might extend the life of my transmission, it's a small price to pay.