i have heard my things when it comes to when i can and cannot use 4 wheel drive high. the dealer told me any time i am towing something, when it is raining, or in the mud i can use it. my transmission shop told me only when in the mud on when towing in speeds under 30 miles an hour. is that true.
i like to use 4 wheel high when it is raining and when towing heavy loades but i will not do it if it adds to the problems the dodge transmission already has.

any help or sugestions would be helpful.