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Auxiliary Transmissions
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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
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How can we assist you with your specific requirements?
If this information is insufficient to select a transmission model, please use this
Medium- and Heavy-Duty Application Engineering Form
to supply your specifications. Our application engineers will be glad to customize and
recommend a model for you. |
To print or download a PDF version of this page, please click here or on the
icon found above each table below.
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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 |
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2.37 |
0.81 |
APO1750-4C |
26.21 |
540 |
6.6 |
17,500 |
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2.37 |
0.81 |
ATO1750-4C |
26.21 |
540 |
6.6 |
17,500 |
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2.37 |
0.81 |
AMO1750-4D |
26.21 |
540 |
6.6 |
17,500 |
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1.59 |
0.81 |
APO1750-4D |
26.21 |
540 |
6.6 |
17,500 |
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1.59 |
0.81 |
ATO1750-4D |
26.21 |
540 |
6.6 |
17,500 |
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1.59 |
0.81 |
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Model No. |
Reverse Gear Ratios |
Gear Ratios |
R1 |
R2 |
R3 |
R4 |
1st |
2nd |
3rd |
4th |
5th |
6th |
7th |
AMO1750-4C |
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2.37 |
1.24 |
1.00 |
0.81 |
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APO1750-4C |
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2.37 |
1.24 |
1.00 |
0.81 |
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ATO1750-4C |
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2.37 |
1.24 |
1.00 |
0.81 |
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AMO1750-4D |
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1.59 |
1.24 |
1.00 |
0.81 |
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APO1750-4D |
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1.59 |
1.24 |
1.00 |
0.81 |
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ATO1750-4D |
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1.59 |
1.24 |
1.00 |
0.81 |
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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) |
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| Notes: |
| (1) 4x4, 6x6 and/or military applications are considered off-highway. |
| (4) Contact transmission engineering for approvals. |
| (5) GCW (lbs.) |
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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 |
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| Notes: |
| EP gear oils are not recommended for operating temperatures above 230°F. |
| Do not mix engine, transmission or gear (axle) lubes. |
| Synthetic SAE 50 required for applications above 399 Horsepower. |
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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 |
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