Topic: 39.5 Iroks on 84 toyota axles

[FSAD]

im planning on running 39.5 iroks (bias) on my 84 toyota. i have the following mods:

longfield superaxles
ARB 3rd
1.5" wheel spacers
gussetted on the top of the tube
running ORS coilover suspension
stazworks 17x9 doublebeadlocks at 3-3.5" BS.
hi steer, ARP studs
hub studs
bobby long 4340 hub gears
truss on the top, and 1/4" diff armor on front

just got my test wheel from staz this week, mounted up an Irok and put it on the axle to see about my choice in back spacing. so far the rubbing will be at a minimum, but DAGGG the setup makes the axle look really small and im concerned primarily with the teeny little section where the knuckle ball is pressed and welded into the housing "tubes".

any thoughts here, ill probably need the knuckle ball gussetts, but the axle is "done" and i hate to think of taking it all apart again!

the truck will be primarily driven off road, but street legal. the goal behind running 39s is that ill be aired down and when doing so, be at or even below 36-37 effective rolling diameter.

thanks
mike

[Volcom]

I think knuckle gussets would be almost mandatory with that big of a tire.  I would also look at trussing the top.  I think both of those would help.

[FSAD [OP]]

got the truss, forgot to add, just edited.

thanks

[alwayzbroken]

hub studs

[FSAD [OP]]

yea, i got the hub studs too. forgot to add

my main concern is the housing at the knuckle ball, i will take it all apart and put in some ball gussetts i guess

thanks for the replys

mike

[Hyena]

what gears do you have in your axles?  i would worry about that more. 

[FSAD [OP]]

5.29s.  my main concern is the balls breaking off.  the ARBs are supposed to be pretty stout and hopefully i was not steered in the wrong direction when i was researching gears and chose 529s (smaller pinion).  i had a guy offer to build me 571s! on another board.. no way...

why do you ask?

[crawlerdan]

i ran a 42 inch tsl on my 85 far a few weeks-in the hammers, and i beat it, and rolled it seven times,,,,the axle is about all that survived

its just like anything else toyota, if you hammer it, and abuse it, it will fail with 31s or 40s, think while you wheel, and plan lines, yuo should be fine, although i would recomend knuckle gussets for good measure

[RAZOR]

What kind of lift are you running? do you have a body Lift?

[crawlerdan]

this was my old rig...no body lift, rears up front w/ jeep add a leafs, shackles under frame, 3 inch drop box , axle moved 8 inches foreward, rear was 63 inch chevs with double pivoting shackles

i could park a front tire 57 inches up and still be touching the other three

also had a flat bed, no rubbing back there, and a fiberglass front clip, no rubbing there

ah i miss that truck...had a 439-1 crawl ratio

[91 super yoda]

got a buddy that runs 39.5 bias iroks and he has broken ring and pinions. 2 rings 1 pinion. a 27 spline longfield, and twisted a 30 spline inside the hub, broke all 6 hub studs clean off. for reliabilty sake i wouldnt go any taller than a 37, maybe 38's with little to moderate skinny pedal.

[FSAD [OP]]

im a very careful wheeler witht he skinny pedal.  i will add the gussetts and make sure im nice to it.

if one of the previous posts were also asking me what lift i was running, and body lift, well, im not sure how much lift, as im using ORS's coilover kit (comes with 12-14" fox coilovers) and i have a 3" body lift.  mounted one tire to my test wheel (stazworks wheels on order, just making sure my backspacing is correct) and cycled the axle up and down, right and left.  seems to be pretty OK as far as rubbing. ill have to chop off (man, are these smily faces and stuff above me as i type annoying or what), ill have to chop off some of the lower rear fender and body just in front of teh doors.

thanks again for all the input, not sure i like the sound of hte last one tho, broken ring and pinions and all....

mike

[alwayzbroken]

You'll be fine. There are plenty of people running these tires with good results.

[snowrun]

I am running the same set-up except mine are radials. Definitely get the knuckle gussets(bent my last housing). I have sheared a few OEM hub studs but have gone to ARPs. I have never had trouble with r&ps.

[FSAD [OP]]

thanks again, ill be tearing down the axle and making some ball gussetts.  also, double checking that i have ARP hub studs.  cant remembver if they were on my first list or not

mike

[RRMike]

I just flap disk'd the paint off my housing and welded the gussets on.  Didn't even take a tire off.  I'm not sure why you're talking about disassembling anything.  The gussets go on the outside of the axle housing after all.

Just cut the shock mounts off, grind it smooth get the paint off and weld.

[Volcom]

You might melt that inner axle seal that is directly under the knuckle gusset though 

[ATLRoach]

I run what you asking except I run a 85 axle(longer lower gusset)..

Here is my setup for the front:
85 Housing
Gussets
ARP everything
30 Spline Longs
Long Hub Gears
LP Elocker
Cryo 5.29 w/ a drag setup(deep)
IFS Hub bodies
1.5" Spacers
Hysteer
Recentered H1(3" BS / 6Lug)
39.5 Bias Iroks



The key to keeping the front to last is good driver skill and correct setup. I'm not worried about my gears as I had them set deep for a reason as it helps with gear deflection to keep from braking teeth.

[idacurt]

atl roach,
post up more pics of that beast with specs!

[Max Heintz]

i have always wanted to do this