any gears from any TF year will fit, but good luck finding a one year item like the 'Maximum Economy Gearing option' - I'd expect about 90% of the 1/2T's came w/ the 3.90's - don't know of any other years that'll fit the carrier, but you could always consider the various overdrive possibilities or change to a newer axle w/ better gears

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