Yes...the key differences between the AX4/5 and Jeep's larger Ax15 is the spacing between the main shaft and lower counter shaft. That changes the case size and ultimately the pattern at the bell housing. I actually owned an AX4 in a 89 Jeep Commanche with a 2.5 inline. Amazing shift feel over the larger AX15. Toyota did the same thing as Jeep and used a smaller W series with the 4 cylinder trucks. They also won't bolt up.
I have yet to prove the D478 as cast 'on'. My Dad has a 2018 JL Rubicon (the guy's 78 years old) with the new D478. Next time I'm up North to visit, I'll take a look.
The NVG is a German made version of the AX 15. Shift's buttery smooth.
Jeep YJ Ax5 Bell
Jeep YJ Ax15 Bell
