don't think there's a 'decoder' for axles, but look at the 49 info kit here, and find the 48-51 shop manual here, both of which will give the ratio for a 3/4T truck - probably 4.56 or there about

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