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Ok so in a couple days I’ll be picking up a beautiful box stock all original Jrx pro. I’d very much like to get and install a HD on it. Would the part numbers in this scan be the correct ones for it ?

Yes. There is the Hydra drive unit, the Losi slipper unit, which together comprise the Hydra Drive Traction Control Unit. Not sure if the stock Jrx Pro topshaft accepts the whole shootin' match or just the slipper and an updated shaft was released in conjunction with the hydra? I just know it's a really long shaft.....all them goodies stacked on it.

I'm fairly certain that the LRM trans with a slipper shaft will work with the Hydra-Drive. If you have the XX Retrofit transmission with slipper, it will definitely fit. Best of luck!

Thanks for the responses, so far from what I’ve come up with the Jrx pro requires both the complete slipper with the new longer top shaft and a complete Hydra.
A-3110 Slipper
and
A-3100 Hydra-Drive

Well after it taking quite some time I finally managed to pick up both the slipper assembly and complete HD NIP and get them installed.

Looking good!

Where does one find such a RAD new JRX Pro? Only tell me and no one else please

Bought off of a friend of a friend, whom consequently helped me get and install the slipper and Hydra drive……
Sorry I told everyone too

That build deserves an A-3906 red spur.

You know what that’s a great idea ! Thankfully I managed to pick up a couple.