out drive Helical cut gears vs straight cut

[HeavyArms]

I am converting my 7k to use axles from the 12k trucks. initially i got the pinion gears. from a 12k to swap on for the axle shaft and i have the Diff stub flanges with smaller Diam ring. well i got a chance to buy grab a full set of out drive Helical cut gears from a REV truck. Does any one know if these are all the same ratio? the straight cut pinion has 13 teeth and the helical cut has 12 teeth. i haven't counted the straight cut driven gear yet. Also will i need to buy the axle stubs for the 12k? or are they all the same spline 7k-10k-12k. Thank you in advance.

 

[86humv]

Stub shafts have all the same splines....the stub shafts in pic : Left one is for solid 12k rotors....Right is 7, 10, 12k vented rotors.

 

[Retiredwarhorses]

there Is no advantage to using the helical gears on your truck, you better off just using A2 halfshafts as they use your existing diff flanges.
you only need to swap out your upper spur gear.