Call me stupid, but someone's gonna have to break it down for me:

Reverse rotation Vs Reverse cut what's the difference???

Does one actually ride on the "reverse" side of the gears? (as in a normal gearset running backwards?)

Why are RC gears weaker?

Does one put the ring gear on the opposite side of the pinionas a "normal" rotation?

Are all High Pinion reverse cut?

So, for example, is my 91' YJ D30 reverse rotation or reverse cut?
Is a Tera60R/Dyna60HP/Currie 9HP Reverse rotation/reverse cut?

Call me a stupid newbie, but I'm sure there are a lot of people out there that don't know the difference (and may claim to). This is the only place where I know I could get a right answer.

reverse cut and recverse roation same same. the reverse rotation refers to the fact the the gears turn and are cut in the oposite direction as a standard gearset. they are only weaker when used in the rear because it now runs on the coast side of the gears. same with a standard rotation front. they are not as strong because they now run on the coast side of the gear. it is not as big of a deal in frontends because most of the load is transfered to the rear. this is why a rr dana44 or currie hp 9" rear can be alittle on the weak side when big tired and lots of power are used. just my take on it anyway

So why can't someone make a gearset that's cut in the opposite direction? Maybe I'm not imagining it right in my head, but couldn't you just reverse the curve of the gears so they no longer run on the coast side????

Originally posted by wrangler40
So why can't someone make a gearset that's cut in the opposite direction? Maybe I'm not imagining it right in my head, but couldn't you just reverse the curve of the gears so they no longer run on the coast side????

they do. it is called standard rotation. why no one has come up with a standard rotation hp rear yet i don't know.

That what I was wondering.

I swear there are so many "why don't they make a..." that it pisses me off.

I wish I had the machinerey to make my own axles/gears/coils/shocks/everything, but it only makes sense to mass produce that crap...

There are no reverse rotation axles. If you reverse the rotation, then you go the other way. It's reverse cut.

Reverse cut gears are stronger in the front than standard cut gears.
Reverse cut gears are weaker in the rear than standard cut gears.
They are stronger in the front because they ride on the drive side of the gears. In the rear they ride on the coast side of the gears.

If you're going backwards, the above three points are reversed.

Ford specifically asked Dana-Spicer to develop the RC 44 and 60 for their trucks. Must have worked out some deal with them as well - you don't see them in Ford or Dodge (other than some Jeep front ends)

As of now, all hi-pinion diffs are indeed reverse cut. Why don't they make a hi-pinion standard cut? Cost. And probably strength. To move the pinion up on a standard cut gear, you'd have to decrease the depth of the teeth. And for the mass produced world, no body gives a rat's ass about the extra 1" of clearance you'd gain with a HP standard cut rear.

What Mo said...

I'd only add that RC gears are ONLY stronger in the front when the vehicle is traveling FORWARD. When you're traveling in reverse with a RC front end it's just like having a standard rotation front end that's propelling a vehicle forward--the pinion gear teeth are pusing on the weaker side of the ring gear teeth. There's no way to get around it.

Keep that in mind next time you throw it in reverse. :D

Jake

Originally posted by wrangler40
So why can't someone make a gearset that's cut in the opposite direction? Maybe I'm not imagining it right in my head, but couldn't you just reverse the curve of the gears so they no longer run on the coast side????

The cut is related to the pinion position. If you have a high pinion, you must reverse cut the gears. That's the only way they will mesh. As for the strenth difference, think of it this way. It is stronger to push on the ring gear than it is to pull on the ring gear. In a rear application, going forwards, a SC low pinion must push on the bottom of the ring gear to move forwards, while a RC High pinion must pull on the top of the ring gear. Does that clear it up for you?

Originally posted by high5
reverse cut and recverse roation same same.

I'm pretty sure they are not the same. Reverse cut gearsets run the same direction as a standard cut. Reverse "rotation" runs the opposite direction. These "reverse rotation" axles would appear in some military and heavy duty axles that have a gear reduction in the hubs. From what I've learned anyways...

Would that be why my 1st gear is reverse and my reverse is 1st gear? Or am I just really confused? :D

Originally posted by wrangler40
Call me a stupid newbie, but I'm sure there are a lot of people out there that don't know the difference (and may claim to).
Ok. Stupid Newbie:flipoff2:
And yes there are plenty of people who think they know all there is to know about an RC axle.