Bob - if you don't get on the highway much it hardly seems worth spending the time and money, you won't see any real fuel savings - and for the TF years the gearset is 3.38, so yes, you would be using 1st and 2nd more to avoid lugging it down

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot