I understand that i have a 5.14 Eaton rear .... i haven't seen any ring and pinion sets for 1 tons either. Maybe i'm just not lookin in the right place
That same rear was used in 3/4- and 1-ton trucks as late as 1972. It was offered with at least three different gear sets and there are persistent rumors of a fourth option.
The 5.14 was used in 1-tons and was an option at least some years in 3/4-ton trucks.
The standard ratio in 3/4-tons '47 to '54 was 4.57. In some later years some 3/4-ton trucks had 4.11 gears.
Those are the three gear sets available for your rear that seem not too hard to find. The fourth option is 3.something but while I hear talk of it, I don't think anyone here has ever claimed to actually have one. I've begun to suspect the 3.something ratio option was not available in the Eaton, but rather in the Dana that was available in the early 70's trucks.
Randy's Ring and Pinion lists some parts for the Eaton rear but may no longer list any gears for it. This rear was popular with the rock crawler crowd at one time, but it appears to me people are moving on to newer rears with more readily available parts. As the market shrinks interest in providing parts for it is shrinking too.
Some time ago I bought a 1-ton that had 3.42 gears. But that rear was a GM 14-bolt from a newer truck. I plan to use that rear under my 1-ton project truck. I expect to get away with the gears while still pulling a load because I intend to run either a Chevy 454 or a Cadillac 500.
