High pinion 9 inch

[triumphrider-1]

So I'm still pondering SAS for my truck and was wondering what all would be needed to convert a standard full width 9 inch (from a '79 Bronco) to a high pinion?

Could I rotate the center section 180 degrees, or do I need to get a different center section / gears?

Thanks

 

[Tweeder]

if you just rotate the chunk, you'll starve the pinion for oil and burn the gears up = bad ju-ju. head on over to truehi9.com to see what it takes. definately expensive proposition

personally, i wouldn't do it. in a rear application you'll be running on the weaker "coast" side of the gearset. more likely to break parts that way.

 

[RWARanger]

not only would he starve the pinion of oil he would have his rear end running in the wrong direction. if he flipped the rear third it would spin in reverse when in forward and vice versa.

same with if he made a custom 9" front and flipped it. the truck would pull itself apart or colapse on itself

 

[Evan]

I think he might be planning on running a 9" as a front axle, in which case you'd want a HP.

 

[RWARanger]

i know you'd want a hp but hes asking if he can just flip the stock third member and use it in the front. a hi-9 third actually uses 8.8 gears and runs on the coast side. so its not much stronger than a d44. but if he used 60 outers and shafts it would be worth it.

 

[4x4junkie]

i know you'd want a hp but hes asking if he can just flip the stock third member and use it in the front. a hi-9 third actually uses 8.8 gears and runs on the coast side. so its not much stronger than a d44. but if he used 60 outers and shafts it would be worth it.

There's actually two different versions of a "hi-pinion 9-inch" out there, the Currie-built one that uses the HP 8.8" F-150 IFS gears, and the "True-Hi-9", which (as it's name properly implies) is based on the exact design of a standard lo-pinion 9. It also incorporates a thrust block to reduce gear deflection when driven on the "wrong" side of the gears.

The Currie axle is is much stronger than a HP D44, and would hold up quite well as a front axle with 60 outers on it. However the True-Hi-9 with it's thrust block would be far superior to it when used in a rear application.

Both the Currie Hi-9 and True Hi-9 are replacement centersections that go into any stock Ford 9" axle housing.

 

[Tweeder]

a hi-9 third actually uses 8.8 gears and runs on the coast side.

sorry, bub. yer wrong. 8.8" gears can, in no way, fit in a 9" third. secondly, in a high-pinion (reverse spiral) front -- which the Hi9 is -- you're running on the drive side.

in the future, could you kindly keep your fingers off the keyboard when you don't know what the hell you're talking about. instead, try looking up some FACTS. they're posted on the Hi9's website.

 

[Tweeder]

the Currie-built one that uses the HP 8.8" F-150 IFS gears

no shit? wow....that's gotta be a helluva hack job.

 

[Toreadorranger]

no shit? wow....that's gotta be a helluva hack job.

Its a completely new cast third, not hacked up at all.

 

[Capt Jay]

sorry, bub. yer wrong. 8.8" gears can, in no way, fit in a 9" third. secondly, in a high-pinion (reverse spiral) front -- which the Hi9 is -- you're running on the drive side.

in the future, could you kindly keep your fingers off the keyboard when you don't know what the hell you're talking about. instead, try looking up some FACTS. they're posted on the Hi9's website.

no shit? wow....that's gotta be a helluva hack job.

One word, Prozac.
Relax this isn't a political discussion.

 

[tubed98]

i notice how alot of people on here type before thinking sort of speak

 

[RWARanger]

eat your own words bud atleast i wasnt being a dick about it

 

[triumphrider-1]

As of this moment the 9 inch will be in the rear, a high pinion 44 will be up front. Since I am thinking to put a high pinion up front, the same out back couldn't hurt.

Thanks for the site, I'll check it out.

 

[Tweeder]

Its a completely new cast third, not hacked up at all.

except that to run 8.8 gears, you lose two key strength features of the original 9". namely, the pinion snout support and the extra tooth engagement offered by the extra-low pinion. in that case, why not just run a regular 8.8"? if you need a quick-change 3rd, why not go with a regular 9"?

don't make no sense at all to me....

 

[Tweeder]

Relax this isn't a political discussion.

haha! i was relaxed. i just got a bit annoyed at the misinformation.

annoyed =

politics =