Your Opinion on adding a Lucas product to the Auto Transmission
 

A few months ago, I bought a 2004.5 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 auto trans has ever been rebuilt. And 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 do not run the truck hard, but I do tow a 7500 lb travel trailer, sometimes in extreme Southern AZ summer temps. And BTW, 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 help 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, 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?

I wouldn't add it. Just plan old ATF 4+. If you are worried about the tranny, change the filter and fluid again. If the tranny has an issue, the Lucas products won't help.

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Good stuff. Tranny started slipping 50,000 miles ago. Added slip fix and it'd been holding up ever since.

I've used the red in 3 trucks for years. Have never had any tranny probs. as of yet but I do regular fluid changes every 30k.