[Mario Cerda]

Empezado por SALVELINUS

¿Y cual es ese modelo?

Me desdigo de lo dicho, todas las Dana 18 tienen la misma apernadura pero solo una la con "big hole" (ver nota en violeta) puede reemplazar directamente a una Dana 20.

The Spicer/Dana 18 is a gear driven transfer case that comes in 5 slightly different variations. The early version of the Dana 18 had a 27 tooth drive gear and 3/4" intermediate shaft and 1.98:1 low. The second generation Dana 18 came with a 26 tooth input gear and 3/4" intermediate shaft and 2.42:1 low. The third generation Dana 18 came with a 26 tooth input gear and 1-1/8" intermediate shaft and 2.42:1 low. The fourth generation Dana 18, uses a 26 tooth input gear, 1-1/4" intermediate shaft, and 2.42:1 low range. The fifth generation Dana 18 uses a 29 tooth input gear, 1-1/4" intermediate shaft, used a larger input hole, the same case used in the Dana 20, and has a 2.46:1 low range. The big hole input is about 4" in diameter where as the small hole input is about 3" in diameter. All Dana 18 cases are cast iron.

The small hole Dana 18s are interchangable, but the input gear must match the transfer case.

The big hole Dana 18 can be bolted on a transmission that was originally coupled with a Dana 20 and visa-versa. All Dana 20 and Dana 18 input gears are 6 spline except ones used with the 10 spline version of the T-14 transmission. All Dana 18s and Dana 20s use the 5 bolt "Texas" bolt pattern

Saludos,

Mario