[OB1]

Compendio de Transfers parte 1

DANA/SPICER 18
Type: Gear-driven, cast-iron
Low-range ratio: 2.46:1
Weight (lb.): 80 (approx.)
Lubricant: 80- to 90-weight
Length (in.): 8.5
Width (in.): 17.0
Height (in.): 8.5
Used by: Jeep, in various versions from 1941-71. Rear output shaft is offset to the right, directly behind the front output shaft. Intermediate shaft diameters were 3/4, 1 1/8 and 1 1/4 inch, but 18s can be bored to accept the 1 1/4-inch shaft and corresponding gears. It is very adaptable, holds up well under moderate V-8 power, and is capable of accepting a PTO and/or overdrive.

Gear-driven, cast-iron
Low-range ratio: 2.46:1
Weight (lb.): 80 (approx.)
Lubricant: 80- to 90-weight
Length (in.): 8.5
Width (in.): 17.0
Height (in.): 8.5
Used by: Jeep, in various versions from 1941-71. Rear output shaft is offset to the right, directly behind the front output shaft. Intermediate shaft diameters were 3/4, 1 1/8 and 1 1/4 inch, but 18s can be bored to accept the 1 1/4-inch shaft and corresponding gears. It is very adaptable, holds up well under moderate V-8 power, and is capable of accepting a PTO and/or overdrive.


DANA/SPICER 20
Type: Gear-driven, cast-iron
Low-range ratio: 2.00:1
Weight (lb.): 80 (approx.)
Lubricant: 80- to 90-weight
Length (in.): 10.5
Width (in.): 17.0
Height (in.): 8.5
Used by: Various Jeeps, starting with the '63 Wagoneer and 1972-79 CJs; also found in 1965-79 IH Scouts (the Scout version was known as TC-145). A non-interchangeable version was found in some GM 1/2-tons and Blazers/Jimmys with three-speed transmissions. The rear output shaft is centered, with the front shaft offset to the right. The Dana 20 allows low-range gears from the Dana 18 to be swapped in. There are three different case designs, the main differences being in shift linkage. There are also three different intermediate gears and output shafts. The Dana 20 is adaptable, compact, and reasonably strong. Gear-driven, cast-iron
Low-range ratio: 2.00:1
Weight (lb.): 80 (approx.)
Lubricant: 80- to 90-weight
Length (in.): 10.5
Width (in.): 17.0
Height (in.): 8.5
Used by: Various Jeeps, starting with the '63 Wagoneer and 1972-79 CJs; also found in 1965-79 IH Scouts (the Scout version was known as TC-145). A non-interchangeable version was found in some GM 1/2-tons and Blazers/Jimmys with three-speed transmissions. The rear output shaft is centered, with the front shaft offset to the right. The Dana 20 allows low-range gears from the Dana 18 to be swapped in. There are three different case designs, the main differences being in shift linkage. There are also three different intermediate gears and output shafts. The Dana 20 is adaptable, compact, and reasonably strong.

The Ford version of this case, used in 1966-77 Broncos, is similar to the Jeep version, except that the front output shaft is on the left side; units manufactured from 1966 to November, '74, used a different style.


NP 203
Type: Chain-driven, cast-iron
Low-range ratio: 2.00:1
Weight (lbs.): 165
Lubricant: 10W-30/10W-40
Length (in.): 21.5
Width (in.): 19.0
Height (in.): 15.0
Used by: Ford, Chevy, and Dodge in all 1971-80 full-size vehicles. Use depended on the year, model, engine, and transmission. It is suitable for V-8 power in trucks with GVWRs of up to 10,000 pounds.
The NP 203 is a "full-time" transfer case; it has a set of differential gears which allow for full-time operation; the differential action can be manually locked out. Kits are available to eliminate the action and convert the 'case to part-time. An NP 203 can be distinguished from a part-time NP 205 by its single-piece rear output housing and shift rail coming out the side of the case.

Chain-driven, cast-iron
Low-range ratio: 2.00:1
Weight (lbs.): 165
Lubricant: 10W-30/10W-40
Length (in.): 21.5
Width (in.): 19.0
Height (in.): 15.0
Used by: Ford, Chevy, and Dodge in all 1971-80 full-size vehicles. Use depended on the year, model, engine, and transmission. It is suitable for V-8 power in trucks with GVWRs of up to 10,000 pounds.
The NP 203 is a "full-time" transfer case; it has a set of differential gears which allow for full-time operation; the differential action can be manually locked out. Kits are available to eliminate the action and convert the 'case to part-time. An NP 203 can be distinguished from a part-time NP 205 by its single-piece rear output housing and shift rail coming out the side of the case.

NP 205
Type: Gear-driven, cast-iron
Low-range ratio: 1.98:1
Weight (lb.): 138
Lubricant: 80- to 90-weight
Length (in.): 13.0 (GM); 16.0 (IH)
Width (in.): 18.0
Height (in.): 12.0
Used by: 1971-1980 Broncos, Blazers, and Ramchargers (and corresponding full-size pickups); the NP 205 is still used on heavy Dodges. Some Dodge and IH models were longer, "divorce-mounted'' versions. The NP 205 has left- or right-side front outputs and a center rear output. Caution is advised: there were many varieties in NP 205 shaft splines and so forth. A PTO plate can be found on the left side of the 'case.

Gear-driven, cast-iron
Low-range ratio: 1.98:1
Weight (lb.): 138
Lubricant: 80- to 90-weight
Length (in.): 13.0 (GM); 16.0 (IH)
Width (in.): 18.0
Height (in.): 12.0
Used by: 1971-1980 Broncos, Blazers, and Ramchargers (and corresponding full-size pickups); the NP 205 is still used on heavy Dodges. Some Dodge and IH models were longer, "divorce-mounted'' versions. The NP 205 has left- or right-side front outputs and a center rear output. Caution is advised: there were many varieties in NP 205 shaft splines and so forth. A PTO plate can be found on the left side of the 'case.

NP 207
Type: Chain-driven, aluminum
Low-range ratio: 2.61:1
Weight (lb.): 68
Lubricant: ATF
Length (in.): 17.0 (face to output shaft)
Width (in.):18 (approx.)
Height (in.): 9.5
Used by: Jeep, in smaller vehicles prior to the introduction of the NP 231. The NP 207 is designed for smaller-displacement engines (input torque rating: 610 lb.-ft.) in vehicles with GVWRs of less than 5,000 pounds.

Chain-driven, aluminum
Low-range ratio: 2.61:1
Weight (lb.): 68
Lubricant: ATF
Length (in.): 17.0 (face to output shaft)
Width (in.):18 (approx.)
Height (in.): 9.5
Used by: Jeep, in smaller vehicles prior to the introduction of the NP 231. The NP 207 is designed for smaller-displacement engines (input torque rating: 610 lb.-ft.) in vehicles with GVWRs of less than 5,000 pounds.

Fuente: OffRoaders.com
http://www.offroaders.com/info/tech-...rans/trans.htm


Saludos,
OB1