This page is about Unimog 406.
Read more about Unimog 416 Gearboxes, Shift Patterns and Top Speeds:
Unimog 416 Gearboxes, Shift Patterns and Maximum Speeds
6 SPEED
Unimog 406
6 Speed (Normal or torque convertor)
6.527 Standard Axle Ratio
AXLE RATIOS
Differentials: 3.143
Hub reduction gears: 2.077
Total axle ratio: 6.527
GEARBOX: UG2/27
VERSION : 6 speed (Normal or torque convertor)
6 Forward
2 Reverse
GEARBOX RATIOS:
1st: 14.53:1
2nd: 8.66:1
3rd: 4.50:1
4th: 2.69:1
5th: 1.65:1
6th: 1.00:1
| Main gears | 1 | 2 | 3 | 4 | 5 | 6 | R-1 | R-2 |
|---|---|---|---|---|---|---|---|---|
| 10.5-20 Tires | 4.56 | 8.26 | 14.71 | 26.64 | 40.24 | 66.28 | 5.70 | 10.32 |
| 12.5-20 Tires | 4.83 | 8.76 | 15.56 | 28.24 | 42.65 | 70.26 | 6.04 | 10.94 |
See more real life pictures of 6 speed gearbox shift levers
20 SPEED CASCADE
Unimog 406
20 Speed (6 Speed + Cascade box)
6.527 Standard Axle Ratio
AXLE RATIOS
Differentials: 3.143
Hub reduction gears: 2.077
Total axle ratio: 6.527
GEARBOX: UG2/27
GEARBOX: 6 Speed + Cascade box (Total 20 forward - Total 8 reverse)
Main gears: 6 forward - 2 reverse
Intermediate gears: 6 forward - 2 reverse
Crawler gears: 4 forward - 2 reverse
Super-crawler gears: 4 forward - 2 reverse
GEARBOX RATIOS:
Main Gears
1st: 14.53:1
2nd: 8.66:1
3rd: 4.50:1
4th: 2.69:1
5th: 1.65:1
6th: 1.00:1
Intermediate
1st: 18.45:1
2nd: 10.99:1
3rd: 5.71:1
4th:3.41:1
5th: 2.09:1
6th: 1.27:1
Crawler
1st: 67.85:1
2nd: 40.44:1
3rd: 21.00:1
4th: 12.56:1
5th: Blocked
6th: Blocked
Super crawler
1st: 623.05:1
2nd: 371.34:1
3rd: 192.95:1
4th: 115.34:1
5th: Blocked
6th: Blocked
| Main gears | 1 | 2 | 3 | 4 | 5 | 6 | R-1 | R-2 |
|---|---|---|---|---|---|---|---|---|
| 10.5-20 Tires | 4.56 | 8.26 | 14.71 | 26.64 | 40.24 | 66.28 | 5.70 | 10.32 |
| 12.5-20 Tires | 4.83 | 8.76 | 15.56 | 28.24 | 42.65 | 70.26 | 6.04 | 10.94 |
| Intermediate gears | 1 | 2 | 3 | 4 | 5 | 6 | R-1 | R-2 |
|---|---|---|---|---|---|---|---|---|
| 10.5-20 Tires | 3.62 | 6.55 | 11.67 | 21.12 | 31.91 | 52.56 | 4.52 | 8.18 |
| 12.5-20 Tires | 3.84 | 6.94 | 12.37 | 22.39 | 33.82 | 55.71 | 4.79 | 8.67 |
| Crawler gears | 1 | 2 | 3 | 4 | 5 | 6 | R-1 | R-2 |
|---|---|---|---|---|---|---|---|---|
| 10.5-20 Tires | 0.98 | 1.77 | 3.15 | 5.71 | ---- | ---- | 1.22 | 2.21 |
| 12.5-20 Tires | 1.04 | 1.88 | 3.34 | 6.05 | ---- | ---- | 1.29 | 2.34 |
| Super-crawler gears | 1 | 2 | 3 | 4 | 5 | 6 | R-1 | R-2 |
|---|---|---|---|---|---|---|---|---|
| 10.5-20 Tires | 0.106 | 0.193 | 0.343 | 0.621 | ---- | ---- | 0.133 | 0.241 |
| 12.5-20 Tires | 0.112 | 0.205 | 0.364 | 0.658 | ---- | ---- | 0.141 | 0.268 |
See more real life pictures of 20 speed cascade gearbox shift levers
2x4 Speed
Unimog 406
2 x 4 gear (Normal or torque convertor)
Standard 6.527 Axle Ratio
AXLE RATIOS
Differentials: 3.143
Hub reduction gears: 2.077
Total axle ratio: 6.527
GEARBOX: UG2/27
VERSION : 2 x 4 Speed (Normal or torque convertor) - (Total 8 forward - 4 reverse)
High-range gears: 4 forward
Low-range gears: 4 forward - 4 reverse
GEARBOX RATIOS
Low Range
1st: 14.53:1
2nd: 8.66:1
3rd: 5.31:1
4th: 3.23:1
High Range
1st: 4.50:1
2nd: 2.69:1
3rd: 1.65:1
4th: 1.00:1
| High-range gears | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 10.5-20 Tires | 14.71 | 26.64 | 40.24 | 66.28 |
| 12.5-20 Tires | 15.59 | 28.24 | 42.62 | 70.26 |
| Low-range gears | 1 | 2 | 3 | 4 | R-1 | R-2 | R-3 | R-4 |
|---|---|---|---|---|---|---|---|---|
| 10.5-20 Tires | 4.56 | 8.26 | 12.47 | 20.54 | 5.70 | 10.32 | 15.59 | 25.68 |
| 12.5-20 Tires | 4.83 | 8.76 | 13.22 | 21.77 | 6.04 | 10.94 | 16.53 | 27.22 |
See more real life pictures of 2x4 speed gearbox shift levers
Comments
I have a 1975 unimog 406…
I have a 1975 unimog 406 with the diff locker lever. I’m struggling with how to engage it. I’ve tried putting it in neutral and shifting it, turning the unit off and trying to engage it but I can’t seem to get it to engage.
Can anyone help me with turning on the diff locks? It is the lever kind not the switch.
Thanks.
Position 1 - Down. Rear…
In reply to I have a 1975 unimog 406… by Tyler Groves
Position 1 - Down. Rear wheel drive. No 4x4, no diff lock.
Position 2 - Pulling the lever one click up. 4 wheel drive, no diff lock.
Position 3 - Pulling the lever two click up to highest position. 4 wheel drive with diff locked.
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