Outdated Spicer Twinstick and Eaton 18-Speed trans 2.1

This Mod has been Broken by the T-Series Remaster in Update 0.31. I made a smaller trans mod for the new T-series here.

This mod adds a Spicer 6+4 Compound and an Eaton Roadranger 18-Speed Transmissions to the T-series and RyanCookie's Wentward 5000/5100 Trucks

This also adds fully animated shifters for both trucks.

This mod was initially based on SebastianJDM's Ranged Gearbox mod and includes copies of his gearboxes that I made work with my animated shifters


How to install into trucks:
- Select transmission from the usual slot
- Replace the front-most driveshaft with the "Range/Split" or "Rangebox" version.
- In the transmission sub-section there should now be "Rangebox" and "Shifter" options.
- Select the appropriate options for the trans(Aux Trans/Twinstick for the Spicer, Range/Split box for the Eaton,Range box for the range transmissions)

Controls:
18-speed
- The range just uses the default range box and so uses the same button to toggle
- There is a new keybinding for "Splitter toggle" for the splitter
Spicer
- if you have a second H-shifter to control the second trans then bind each gear to "AUX gear #" and it will go into neutral if you shift out of gear
- if you just have buttons to control the aux trans then use "AUX Gear(button) #" and it will say in that gear after being pressed. YOu can also bind a button to neutral if you want to take the second trans out of gear.

What are these transmissions?
Both of these are different ways large trucks have gotten the many gear ratios they need without having so many discrete gears.

Eaton Roadranger
The Eaton works by having basically a 5-speed manual transmission with a pair of two-speed gearboxes attached to the output. One of these extra gearboxes called the rangebox shifts all the main gear ratios up such that first gear with the rangebox in high is just above fifth gear in low effectively giving you 10-gears. The other gearbox known as the splitter also shifts the ratios but only very slightly effectively giving you a gear halfway between all of the existing 10 gears. This is THE option now for heavy truck manual transmissions.

Spicer Compound
The Spicer achieves more gears by having a second 4-speed gearbox attached to the end rather than a pair of two-speed boxes. this results in a more difficult trans to use as there are two H-shifters to work and the gear spacing is often not as even as an Eaton box but it can give you 24 different ratios to work with. These were popular for a time but have almost entirely been replaced nowadays.

Known Issues/Plans:
- The Spicer twin-stick will cause LUA errors when shifting. this is due to my Jank LUA implementation.
- No gear grinding is simulated on the aux gears or the range/split.
- "Low" gear can still be used in the high range on the 18-speed, unlike the real thing.
- Currently doesn't support GTG's T-series expansion
- Add more different gear ratio versions

T-Series Trans mod
Wentward 5000 Mod