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I used to have a '96 Dodge Dakota. 318 auto 4WD. The transmission started slipping shortly after I picked it up. On advice from a Dakota forum member I put a bottle of that Lucas additive in it. Within a matter of a few days it stopped slipping and never did for the rest of the time I owned it. Is it ok to add that stuff to the tranny on my F250 if it's not slipping or anything (knock on wood). I think it works as a "conditioner". My truck has 155k on it and would like to get many more miles on it.
Use snake oil when the situation arises. Other than that, if the transmission is working as it should, has no I'll effects from proper maintenance, and operates as it should, then leave it be. Your only asking for problems if you haven't had them before.
ive used the lucas trans fix on a bunch of stuff over the years. normally small cars, beaters, etc that weren't worth the cost of a trans rebuild....but it worked everytime. how long it prolongs stuff, I don't know....
with a fresh fluid change, yea the lucas would be fine in a perfectly operating transmission. what I don't know, is how the added viscosity effects pumping of fluid over a long period of time. in other words, when a transmission is slipping, the lucas might mask one problem while slowly forming another.
personally, despite what I said above, id run it in any automagic.
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