Your gearing will either be 24/39 or 23/40.
I'm pretty sure the 96 ZRT had the 24/39 gear's.
ATF will work just fine, and it's a lot cheaper than the specialized oil's.
I've been using ATF in all My sled's for years, with no problem's.
Sound's like someone was gearing it for a quicker launch.
Like I said above the original gearing in the ZRT's was either 24/39, or 23/40.
I've seen ZRT's with both set's as original.
The 24/39 will give you a bigger top end speed, the 23/40 will give you the quicker launch.
At 22/41 I'd say someone had geared it for 600 ft drag's at some time.
i don't know much about the clutches on snowmobiles bet the secondary has a solid yellow spring and the primary has a yellow spring with a green stripe the sled launched right around 5000 and peaked out at 8300 it seemed to launch hard but it seemed like a turd threw the power band but top end was pretty good i didn't run a GPS put the needle on the speedometer hit the T on arctic cat but when i tore everything apart the carbs were out of adjustment and all three cylinders were under 100psi so hopefully after i freshen up the top end she will scream
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