Auxiliary transmissions provide maximum versatility for on-/off-highway applications when teamed with a TTC manual transmission. TTC manufactures six models, including two pneumatic (air-shifted), and four manually shifted units. Both air-shifted models feature a single selector with a "no-repeat" shift lever design.

Providing maximum flexibility, all auxiliary transmissions have four speeds, with a .81 overdrive ratio. Standard PTO mountings include: side-mount 6 and 8 bolt openings. A top mount PTO model is also available.

Auxiliary transmissions are used in a wide variety of applications including: drilling-rigs, mining, lumber, and stationary equipment.

Features:

• Four speeds
• Creeper gear
• .81 overdrive
• Variety of ratios available
• Manually shifted
• Pneumatic (air-shift) no-repeat shift pattern
• Variety of PTO mountings
• Twin countershaft design
• FEA optimized case design
• Shot peened gears

General Specifications

Model No.

Length
(in)

Weight
(lbs)

Lube Cap.
(liters)

Torque Cap.
(lbs-ft)

Overall
Ratio

Reverse
Gear

Gear Ratios

R1

Low Gear

Top Gear

AMO1750-4C

26.21

540

6.6

17,500

2.37

0.81

APO1750-4C

26.21

540

6.6

17,500

2.37

0.81

ATO1750-4C

26.21

540

6.6

17,500

2.37

0.81

AMO1750-4D

26.21

540

6.6

17,500

1.59

0.81

APO1750-4D

26.21

540

6.6

17,500

1.59

0.81

ATO1750-4D

26.21

540

6.6

17,500

1.59

0.81

Gear Ratios

Model No.

Reverse Gear Ratios

Gear Ratios

R1

R2

R3

R4

1st

2nd

3rd

4th

5th

6th

7th

AMO1750-4C

2.37

1.24

1.00

0.81

APO1750-4C

2.37

1.24

1.00

0.81

ATO1750-4C

2.37

1.24

1.00

0.81

AMO1750-4D

1.59

1.24

1.00

0.81

APO1750-4D

1.59

1.24

1.00

0.81

ATO1750-4D

1.59

1.24

1.00

0.81

General Application Guidelines

Model No.

On-Highway (1)

Off-Highway

Off-Shore

GVW
(lbs)

Torque
(lbs-ft)

GVW
(lbs)

Torque
(lbs-ft)

GVW
(lbs)

Torque
(lbs-ft)

AMO1750-4C (5)

80,000 & under

17,500

80,000 & under

17,500

(4)

(4)

80,001 - 125,000

14,500

80,001 - 125,000

14,500

(4)

(4)

125,001 - 250,000

12,500

125,001 - 250,000

12,500

(4)

(4)

APO1750-4C (5)

80,000 & under

17,500

80,000 & under

17,500

(4)

(4)

80,001 - 125,000

14,500

80,001 - 125,000

14,500

(4)

(4)

125,001 - 250,000

12,500

125,001 - 250,000

12,500

(4)

(4)

ATO1750-4C (5)

80,000 & under

17,500

80,000 & under

17,500

(4)

(4)

80,001 - 125,000

14,500

80,001 - 125,000

14,500

(4)

(4)

125,001 - 250,000

12,500

125,001 - 250,000

12,500

(4)

(4)

AMO1750-4D (5)

80,000 & under

17,500

80,000 & under

17,500

(4)

(4)

80,001 - 125,000

14,500

80,001 - 125,000

14,500

(4)

(4)

125,001 - 250,000

12,500

125,001 - 250,000

12,500

(4)

(4)

APO1750-4D (5)

80,000 & under

17,500

80,000 & under

17,500

(4)

(4)

80,001 - 125,000

14,500

80,001 - 125,000

14,500

(4)

(4)

125,001 - 250,000

12,500

125,001 - 250,000

12,500

(4)

(4)

ATO1750-4D (5)

80,000 & under

17,500

80,000 & under

17,500

(4)

(4)

80,001 - 125,000

14,500

80,001 - 125,000

14,500

(4)

(4)

125,001 - 250,000

12,500

125,001 - 250,000

12,500

(4)

(4)

Lubrication Requirements

Non-Synchronized (PRO-SHIFT Models)

Temperature

SAE Grade

Class/Type

All

50

Synthetic Transmission Oil
Spicer Specification MS-961-T

Above 0°F

50

HD Engine Oil
Mil-L-2104D or E
API-CD, CE, SF or SG
Cat TO-4

Below 0°F

30

Above 0°F

80W-90

Automotive Gear Oil
API MT-1

Below 0°F

75W

Change Intervals

Type

On Highway

Off Highway

Mineral

1 year or 100,000 miles

Every 1000 Hours

Semi-synthetic

2 years or 250,000 miles

Every 1000 Hours

Synthetic

5 years or 500,000 miles

Every 1000 Hours

Auxiliary transmissions provide maximum versatility for on-/off-highway applications when teamed with a TTC manual transmission. TTC manufactures six models, including two pneumatic (air-shifted), and four manually shifted units. Both air-shifted models feature a single selector with a "no-repeat" shift lever design.

Providing maximum flexibility, all auxiliary transmissions have four speeds, with a .81 overdrive ratio. Standard PTO mountings include: side-mount 6 and 8 bolt openings. A top mount PTO model is also available.

Auxiliary transmissions are used in a wide variety of applications including: drilling-rigs, mining, lumber, and stationary equipment.

Features:

• Four speeds
• Creeper gear
• .81 overdrive
• Variety of ratios available
• Manually shifted
• Pneumatic (air-shift) no-repeat shift pattern
• Variety of PTO mountings
• Twin countershaft design
• FEA optimized case design
• Shot peened gears

General Specifications

Model No.

Length
(mm)

Weight
(kg)

Lube Cap.
(pints)

Torque Cap.
(N-m)

Overall
Ratio

Reverse
Gear

Gear Ratios

R1

Low Gear

Top Gear

AMO1750-4C

665.73

244.89

11.99

23,730

2.37

0.81

APO1750-4C

665.73

244.89

11.99

23,730

2.37

0.81

ATO1750-4C

665.73

244.89

11.99

23,730

2.37

0.81

AMO1750-4D

665.73

244.89

11.99

23,730

1.59

0.81

APO1750-4D

665.73

244.89

11.99

23,730

1.59

0.81

ATO1750-4D

665.73

244.89

11.99

23,730

1.59

0.81

Gear Ratios

Model No.

Reverse Gear Ratios

Gear Ratios

R1

R2

R3

R4

1st

2nd

3rd

4th

5th

6th

7th

AMO1750-4C

2.37

1.24

1.00

0.81

APO1750-4C

2.37

1.24

1.00

0.81

ATO1750-4C

2.37

1.24

1.00

0.81

AMO1750-4D

1.59

1.24

1.00

0.81

APO1750-4D

1.59

1.24

1.00

0.81

ATO1750-4D

1.59

1.24

1.00

0.81

General Application Guidelines

Model No.

On-Highway (1)

Off-Highway

Off-Shore

GVW
(kg)

Torque
(N-m)

GVW
(kg)

Torque
(N-m)

GVW
(kg)

Torque
(N-m)

AMO1750-4C (5)

36,280 & under

23,730

36,280 & under

23,730

(4)

(4)

36,280.45 - 56,687.5

19,662

36,280.45 - 56,687.50

19,662

(4)

(4)

56,687.95 - 113,375

16,950

56,687.95 - 113,375

16,950

(4)

(4)

APO1750-4C (5)

36,280 & under

23,730

36,280 & under

23,730

(4)

(4)

36,280.45 - 56,687.5

19,662

36,280.45 - 56,687.5

19,662

(4)

(4)

56,687.95 - 113,375

16,950

56,687.95 - 113,375

16,950

(4)

(4)

ATO1750-4C (5)

36,280 & under

23,730

36,280 & under

23,730

(4)

(4)

36,280.45 - 56,687.5

19,662

36,280.45 - 56,687.5

19,662

(4)

(4)

56,687.95 - 113,375

16,950

56,687.95 - 113,375

16,950

(4)

(4)

AMO1750-4D (5)

36,280 & under

23,730

36,280 & under

23,730

(4)

(4)

36,280.45 - 56,687.5

19,662

36,280.45 - 56,687.5

19,662

(4)

(4)

56,687.95 - 113,375

16,950

56,687.95 - 113,375

16,950

(4)

(4)

APO1750-4D (5)

36,280 & under

23,730

36,280 & under

23,730

(4)

(4)

36,280.45 - 56,687.5

19,662

36,280.45 - 56,687.5

19,662

(4)

(4)

56,687.95 - 113,375

16,950

56,687.95 - 113,375

16,950

(4)

(4)

ATO1750-4D (5)

36,280 & under

23,730

36,280 & under

23,730

(4)

(4)

36,280.45 - 56,687.5

19,662

36,280.45 - 56,687.5

19,662

(4)

(4)

56,687.95 - 113,375

16,950

56,687.95 - 113,375

16,950

(4)

(4)

Lubrication Requirements

Non-Synchronized (PRO-SHIFT Models)

Temperature

SAE Grade

Class/Type

All

50

Synthetic Transmission Oil
Spicer Specification MS-961-T

Above 0°F

50

HD Engine Oil
Mil-L-2104D or E
API-CD, CE, SF or SG
Cat TO-4

Below 0°F

30

Above 0°F

80W-90

Automotive Gear Oil
API MT-1

Below 0°F

75W

Change Intervals

Type

On Highway

Off Highway

Mineral

1 year or 100,000 miles

Every 1000 Hours

Semi-synthetic

2 years or 250,000 miles

Every 1000 Hours

Synthetic

5 years or 500,000 miles

Every 1000 Hours