ford 9" info

cburgin

Well-Known Member
Joined
Mar 20, 2005
Location
statesville/boone NC
loooking for a ford 9" for my yj if it doesnt sale. was wondering what is the best to look for. i know a nodular housing but 37 inch tires tops will be ran. from my understanding i want a big bearing model, correct? will this allow 35 spline shafts if i decide to do that later? also, i will be running a j10 6 lug front. so how hard it it to make the rear match? sorry for all the newbie questions
 
6 lug to 5 lug

cburgin said:
loooking for a ford 9" for my yj if it doesnt sale. was wondering what is the best to look for. i know a nodular housing but 37 inch tires tops will be ran. from my understanding i want a big bearing model, correct? will this allow 35 spline shafts if i decide to do that later? also, i will be running a j10 6 lug front. so how hard it it to make the rear match? sorry for all the newbie questions
Click to expand...

Youll have to change the front j-10 to 5 lug, its fairly easy, just use chevy small bearing spindles and hubs and rotors from a 1/2 ton ford. just search for more, but heres a link.
http://www.jeepgod.net/d44625.html
 
cburgin said:
no i think it is 6 lug but wonder what the internal difference is since it is 2wd?
Click to expand...
axle shaft size and spline count on the axle shafts most likely
 
All 2wd and 4wd T100's, Tundra's, and Sequoia's use a newer/stronger 8" 2-pinion diff. Tacoma 4x4's and Tacoma PreRunner's that don't come with the electric locker, as well as V6 Tacoma 4x2's also came with this diff. One easy way to identify it is by the larger mounting hardware (10mm studs w/ 14mm nuts) vs. the smaller stuff on the older diffs (8mm w/ 12mm nuts). It also has a different shaped diff cover. and a slightly larger diameter bolt pattern and flange (about 1/4" larger) than the 8" 4cyl or V6 diffs. It has a large one-piece carrier bearing cap (or "truss") that bridges over the ring gear to add strength. The axles that fit into these diffs are the same size as the earlier 8" diffs (30 spline).
In the past this diff has also been mistakenly called an 8.4" or 8.25" diff. The ring gear actually measures 8", but it is not compatible with the older 8" diffs at all. The extra strength of this diff comes from the bearing cap/truss and large diameter pinion gear shaft.
Aftermarket parts have so far been fairly limited for this diff. At this time, the only LSD available is the TRD/Kazuma clutch-type 3-pinion LSD, the OEM 4-pinion Tundra TRD LSD, and the only lockers available are the Powertrax "Lock-right," "No-Slip," and the ARB Air Locker (RD-89). Update- Tractech also now makes a Detroit Softlocker and Truetrac for this diff.
This diff cannot be fitted to an older style 8" axle because it uses a larger diameter mounting bolt pattern and because more space inside the housing necessary to accommodate the large bearing cap. The different bolt pattern also makes it very impractical to swap in an electric locking Toyota diff (the whole mounting flange would have to be re-done using a special jig).
Twelve 12mm ring gear bolts, 30 spline pinion shaft.
 
Nice quote.. :flipoff2:

T100 rear is perfect for your tire size.

9" is great for future upgrades. (I said I'd never want more than a small 38")

With the 9", you could also just get 6x5.5" shafts ..easy schmeezee
 
Every one I saw was 6-lug. Tacos (non prerunner) were the 5-lug 2wd's.
 
There's a dude on ebay selling 40 spline shafts, any length you want, any bolt pattern, with bearings, for like $575. I don't know what carriers are available for 40 splines, but a spool is less than $200. BTW, 40 spline = BEEF.
 
:confused: I found some info that talks about the bore size on the case. but i don't know if that means a whole new housing, or if you can have some machine work done on a case and make it fit. if anybody knows for sure let me know.
My 10 bolt rear w/ 38's will need some attention soon.
 
You can bore the housings out to accept bigger axles but I am not sure if you can bore it out enough to accept a 40 spline axle shaft or not. When you do this you need to make sure the person doing it knows what they are doing. If it is not right the heat generated from driving can lock the bearings down when the housing expands.
 
Not sure what you are talking about when you say " bore the housing " on a 9 inch??

There are three 9 inch thirdmember case sizes. This refers to the carrier bearing size. A small size was for 28 spline axles commonly found in early bronco's etc. Then there was the case for the 31 spline. last size is for the 35 spline etc. It is the biggest bearing size. This allows for the extra material under the bearing area since the hole in the carrier has to be bigger for the bigger axle shaft. You can buy conversion carriers but the material under the bearing is less and therefore weaker.

All cases will fit any 9 inch housing. Yes there is some custom cases with even bigger carrier bearing sizes for the 40 spline.

Jeg's has the Strange Street/track series axles for about $400. These are 35 spline, cut to length, bearings, retainers all included. Add a Nodular big bearing case and a full spool and then just try to break it! Go ahead and give it your best shot...
 
Broncman said:
There are three 9 inch thirdmember case sizes. This refers to the carrier bearing size. A small size was for 28 spline axles commonly found in early bronco's etc. Then there was the case for the 31 spline. last size is for the 35 spline etc. It is the biggest bearing size. This allows for the extra material under the bearing area since the hole in the carrier has to be bigger for the bigger axle shaft. You can buy conversion carriers but the material under the bearing is less and therefore weaker.
Click to expand...

Is there a stock carrier that will accept 35+ spline shafts?
 
To my knowledge, their is not either. All of the factory N case that I have heard of were for 31 splines. 3.062 ?? The aftermarket N cases can be had in 3.250 for the 35 spline stuff.
 
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