

Spicer 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.
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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Download the service manual
Spicer Auxiliary Transmission Parts Catalog
|
General Specifications |
Model No. |
Length |
Weight |
Lube Cap. |
Torque Cap. |
Overall |
Reverse |
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 |
Torque |
GVW |
Torque |
GVW |
Torque |
|
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 |
Above 00F |
50 |
HD Engine Oil |
Below 00F |
30 |
|
Above 00F |
80W-90 |
Automotive Gear Oil |
Below 00F |
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 |
Note: Information gathered from TTC Automotive



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