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JDs 15 speed (MS-15D)

Uses arrow keys to manually shift gears in a H Pattern

15 speed semi truck style transmission with true twin countershaft design, High and Low range as well as Deep Reduction "DR" functionality and Reverse
- has a realistic "horseshoe" shift pattern
- has a blue indicater switch for DR (switch forward is on)
and only engage when in low range

Main 10 gear shift sequence:
1-2-3-4-5-Range-1-2-3-4-5

Deep reduction sequences:
DR1-DR2-1-2-3-4-5- Range-1-2-3-4-5
DR1-DR2-DR3-DR4-DR5-4-5-range-1-2-3-4-5

Ratios:
DR1-15:1
DR2-12:1
DR3-10:1
DR4-7:1
DR5-5.5:1
1st-9.0:1
2nd-7.2:1
3rd-6.6:1
4th-4.3:1
5th-3.3:1
6th-3.0:1
7th-2.4:1
8th-2.0:1
9th-1.4:1
10th-1.1:1

-uses centrifugal clutch for easier operation
-has two sets of drive gear assemblies for maximum strength