[soutthpaw]

go with a gear splitter, not sure if Gear vendors make one for your vehicle...

but like everything else, will you ever recoup the money spent on the mods in fuel savings....
For example, I am looking for a gear splitter, also referred to as a (aux trans, or brownie box) for my FSR but thats cuz it will only go 55mph now due to the gearing... but as they are only around used and rare at that its about $1000 for a decent one if I can find it... prob another $1000 for a different ratio 3rd member... I have found one in CA that is a 3.55... Currently I am geared at a 4.88 or 4.33 not totally sure yet..
Still that is less than the $3000 Gear vendors gets for their units... Due to the size of the FSR it probably won't take too long to recoup that cost if i start using it as an RV tow vehicle... I will gain about a 25% fuel savings and be able to do 70-75 on the fwy