Why do people say that the Currie High Pinion 9" is weak? Lets here some info:D

It uses 8.8" gears.

Weak is all relative when your in a group like this. Many of the users have 1 ton and up running gear on vehicles that weigh under 5000# and will never experience the vertical loading the axles where designed to take (but they can still bust 'em).

I would run a hi pinion 9" in my TJ anyday, I just can't afford one.

I know somebody that has one on the rear of his CJ7. He's running a 350, T18, and 35" boggers. No problems for him as of yet.

ive run them front and rear for the last year........... rear has been not one single problem.... front pos 44 joints well thats another story.......... ctm will have fixed that from what i can see.... ill be selling mine in the near future... or sooner if the $$$$ is in my hands :D new project is requiring a little wider than i am right now... :D :flipoff2:

Weak IS all relative, part of the reasonmost people say they are weak, is maybe partly to slander currie?? I don't really know where the stories came from. I've not seen one break yet. I disliked currie before I bought mine and I hate them more after. Thats another story. I have been running mine for a few years now with 38's with no problems. I also run an sm420 and a 300 hp 350. Mine is a 35 spline unit. Trust me, I have abused it. Especially when it was new, and under warranty. Everybody thinks just because it has an 8.8 inch ring gear that it is weak. There are many more factors to strength than just r.g. dia. I don't have the dimensions anymore but the pinion is (I think) the same diameter as the 60 pinion, and shorter, and the ring gear teeth contact area (toe to heel) is roughly 1.5 times greater than a 60. So it's r.g. is "wider" than a 44, 60, 70 ring gear, although smaller diameter. I will be getting rid of mine due to the lack of low gear options, not strength issues.

Just remeber that running a reverse cut R&P in the rear loses about 20% in strength compared to running it up front. So if you are having problems with a differential of similar size that you will be losing ground not gaining it by running one.

Originally posted by Blackjack
Just remeber that running a reverse cut R&P in the rear loses about 20% in strength compared to running it up front. So if you are having problems with a differential of similar size that you will be losing ground not gaining it by running one.

I must be confused. I though when you ran a hi pinion rear, reverse cut gears would take the torque off the coast side.

Std. cut gears cannot be used in a high pinion application - only rev. cut.
Rev. cut gears were designed to be stronger in the front. In the rear they will be weaker than std. cut 8.8" gears.
I think Currie only recommends them for up to 35" tires. I'm not saying they can't handle more, but I'm going HP60 for about the same $$. Don't want to spend money & not be sure it's strong enough. Plus I can use 5.13's.
Like everyone says - it all depends.

I have a HP 9 in the rear of my Jeep; 31sp, detroit, 4.56. I beat the snot out of it, and never have a problem.
Per the Currie rep I spoke to a while back, the only thing they've seen folks break have been R&P; all the applications that experienced failure were big hp, big tires, and a happy foot; so sayeth the rep.
I'm not worried about mine.

why do they use 8.8 gears? i didnt think there was a factory reverse cut 8.8 so the gears would have to be specially made for this application. and if they are specially made then why not make the ring gear 9". that way you can call it a Ford 9" and not be fibbin

The gears' application is for ford 8.8 front. Rev. cut