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hi9 vs low pinion...

Old Aug 17, 2008 | 12:48 AM
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Default hi9 vs low pinion...

i found a complete brand new third member for 1770$ and it comes with 35 spline count...so i need to add the shafts which are 435$...or...should i go hi9 with 31 spline which runs about the same....

both with arb locker...

like point been do i really need 35 spline..?...

im going to run 37s..
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Old Aug 17, 2008 | 11:08 AM
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anyone?..
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Old Aug 17, 2008 | 03:34 PM
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From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
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Sounds kinda high priced to me but your JY may have higher prices than around here. Here the pickin's are getting kinda slim for XJs.
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Old Aug 17, 2008 | 05:10 PM
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what do you mean??..
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Old Aug 18, 2008 | 03:32 AM
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From: Kalkaska, Michigan
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Hi9's are always high priced. But that does seem kinda high, now for the 35 spline that's right on par with any diff set up. How high lift are you going with? I'd say if it isn't say 8 or more go with the 35 spline and never worry about a shaft again...
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Old Aug 19, 2008 | 09:19 AM
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are you gonna play in the rocks or not?

the 9" pinion hangs down hella low, and i would never run one
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Old Aug 19, 2008 | 11:22 AM
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From: Denver
Year: 1988
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There's a couple different Hi9's out.

Hope I'm not misleading you on this, I should refresh my mind on the research I did in the past, but..... IIRC

Currie has it's Hi 9, and it uses a 8.8" ring gear.

Then there's the True Hi9 differential which uses a 9" ring gear and also has ring gear supports built into the case. I've heard nothing but good things about them and the one we installed in a budiies TJ is holding up to some hard core stuff.

Can't help you on pricing, I haven't looked that far into it.

Both of those will bolt into a stock 9" housing or there are several options for aftermarket high clearance housings like the Currie and Spidertrax housings.

Both of these have much more clearance then a stock Ford 9" differential which is a low pinion differential, still very strong, they are generally considered to be as strong as a D60, I run a stock one and I do have a little less clearance then say a D44, but it's not that much of a problem, and with a shaved housing, it would be almost the same as a D44.

35 spline axles are good insurance if you're gonna run 37's, but stock spline alloy axles would probably hold up to 37's just fine too.

Hope that helps, Terry
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Old Aug 19, 2008 | 11:25 AM
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i was in this dilemma before...is that 700$ ...well they are 700$ which make a big difference....but then..what i think is ...i dont want to have to do stuff twice.....may as well go truehi9 with the 31 spline..?

i plan to do rocks....not a lot...i live in florida everytime i wana go see rocks i have to drive at least 5 hours
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