Transfer case
All Highboys had divorced transfer cases, as opposed to married transfer
cases. A married transfer case is bolted directly to the transmission. A
divorced transfer case is bolted onto its own cross-member, and is
separated from the transmission by a driveshaft.
Highboys had Dana 24 part-time transfer cases from 1967-1973, and either the standard NP205 part-time or optional NP203 full-time transfer cases from 1973-1977.5.
The NP205 is the strongest and most desirable factory transfer case.
The Dana 24 is a cast-iron, gear-driven, part-time, 2-speed case with
1.86:1 gears. The NP203 is a chain-driven, full-time, 2-speed case with
2.00:1 gears. The NP205 is a cast-iron, gear-driven, part-time, 2-speed
case with 1.96:1 gears.
Highboys had either a 3-speed Ford Toploader manual (1967-1971), the
NP-435 4x2 4-speed manual (1967-1977.5 -- yes, the 4x4 got the 4x2
transmission), or the optional SelectShift Cruise-O-Matic C-6 in
1973-1977.5. The reason that 4x2 transmissions were used in these 4x4's
was due to the divorced transfer case. The NP-435 was optional in
1967-1971, and standard in 1972-1977.5.
Toploader Models (Engines): RAN-E1 (240 1V), RAN-G1 (240 1V), RAT-G
(300 1V, 360 2V), RAT-H (300 1V, 360 2V)
Toploader Gear Ratios (1,2,3,R): 2.99, 1.75, 1.00, 3.17
NP-435 Gear Ratios: (1,2,3,4,R): 6.69, 3.34, 1.79, 1.00, 8.00
Cruise-O-Matic Gear Ratios: (1,2,3,R): 2.46, 1.46, 1.00, 2.20
All Highboys had divorced transfer cases, as opposed to married transfer
cases. A married transfer case is bolted directly to the transmission. A
divorcimed transfer case is bolted onto its own cross-member, and is
separated from the transmission by a driveshaft.
Highboys had Dana 24 part-time transfer cases from 1967-1973, and either the standard NP205 part-time or optional NP203 full-time transfer cases from 1973-1977.5.
The NP205 is the strongest and most desirable factory transfer case.
The Dana 24 is a cast-iron, gear-driven, part-time, 2-speed case with
1.86:1 gears. The NP203 is a chain-driven, full-time, 2-speed case with
2.00:1 gears. The NP205 is a cast-iron, gear-driven, part-time, 2-speed
case with 1.96:1 gears.
Highboys had either a 3-speed Ford Toploader manual (1967-1971), the
NP-435 4x2 4-speed manual (1967-1977.5 -- yes, the 4x4 got the 4x2
transmission), or the optional SelectShift Cruise-O-Matic C-6 in
1973-1977.5. The reason that 4x2 transmissions were used in these 4x4's
was due to the divorced transfer case. The NP-435 was optional in
1967-1971, and standard in 1972-1977.5.
Toploader Models (Engines): RAN-E1 (240 1V), RAN-G1 (240 1V), RAT-G
(300 1V, 360 2V), RAT-H (300 1V, 360 2V)
Toploader Gear Ratios (1,2,3,R): 2.99, 1.75, 1.00, 3.17
NP-435 Gear Ratios: (1,2,3,4,R): 6.69, 3.34, 1.79, 1.00, 8.00
Cruise-O-Matic Gear Ratios: (1,2,3,R): 2.46, 1.46, 1.00, 2.20








