Author Topic: big tires and stock birfs. (Read 4254 times)

90toy · « **on:** May 19, 2007, 01:02:58 PM »

i'm looking at getting some 37" irocks for the runner. just wondering if the stock birfs will be able to hold up or will i be changing them on every run i go on. i dont mind breaking one every now and then but i dont want to be doing it every day. how many of you are running 35"+ tires on stock birfs?

SACD_Runner · « **Reply #1 on:** May 19, 2007, 01:04:38 PM »

So far my 35" TXR's and stock birfs have been doing good. I dunno if i'd go much bigger then 36's though.

46&2 · « **Reply #2 on:** May 19, 2007, 01:15:50 PM »

Are you locked up front? If not it shouldnt be too big of a problem. I have a buddy that ran stock birfs with 37x12.5s and an open front diff for two years, never broke a birfield. He wheeled it pretty hard too. I think going past 37s is going to start pushing it, especially if you end up getting a locker, then it will definitely fail eventually. My friend swapped his birfs out for marlins birf-eliminator kit because he is getting an ARB, but that is the only reason why.

I would say keep em and just remember that you have stock birfs. Dont bash your front around or bind your tires up and floor it all the time and you should be fine. If you do get a front locker then you will probably want to upgrade to Longfields or Marfields because then you will start breaking birfs more often.

*** YELLER *** · « **Reply #3 on:** May 19, 2007, 01:18:23 PM »

MINI is runnin 36 " IROCS w/ an aussie in front and he hasnt had any problems yet....

46&2 · « **Reply #4 on:** May 19, 2007, 01:29:58 PM »

Yeah it all depends on how you drive really. If you are conservative the birfs will hold up fine. If you like to hammer down...well then they might not do so hot

DTB · « **Reply #5 on:** May 19, 2007, 01:49:02 PM »

Quote from: oldyellercj on May 19, 2007, 01:18:23 PM

MINI is runnin 36 " IROCS w/ an aussie in front and he hasnt had any problems yet....

i thought mini had longs? no?

*** YELLER *** · « **Reply #6 on:** May 19, 2007, 02:19:57 PM »

Quote from: DirToyBoy on May 19, 2007, 01:49:02 PM

i thought mini had longs? no?

Nope stock Birfs

Rockcrawlintoy · « **Reply #7 on:** May 19, 2007, 02:34:29 PM »

im runnin 40in iroks and stock dana 44 shafts and joints. its all on how you drive. remember though its not a matter of if it breaks but when

DRew

90toy · « **Reply #8 on:** May 19, 2007, 03:10:40 PM »

thanks guys. i was a little bit skeptical on the situation. i was even going to look for smaller tires.i do drive the rig pretty hard so i guess i have to let off a little and I'll be sure to bring extra birfs when i go wheeling. hopefully i can get them tomorrow along with some 15x10" rims.

jb1981 · « **Reply #9 on:** May 21, 2007, 01:38:20 PM »

i run 35" tires with a detroit soft locker in the front and stock birfs, no problems yet.

79coyotefrg · « **Reply #10 on:** May 21, 2007, 01:55:02 PM »

Quote from: jb1981 on May 21, 2007, 01:38:20 PM

i run 35" tires with a detroit soft locker in the front and stock birfs, no problems yet.

do you have dual cases ?? i busted a pass side birf a few months ago and im open up front with 32's

um

of course i did miss the clutch and stab the brake pedal by mistake

crawlerdan · « **Reply #11 on:** May 21, 2007, 01:59:44 PM »

Quote from: 90toy on May 19, 2007, 01:02:58 PM

i'm looking at getting some 37" irocks for the runner. just wondering if the stock birfs will be able to hold up or will i be changing them on every run i go on. i dont mind breaking one every now and then but i dont want to be doing it every day. how many of you are running 35"+ tires on stock birfs?

i was running 37s on stockers, for a while, no problems, but i dont use the throttle at all in 4wd, i let it idle....so .......your gonna want aftermarket birfs is what im getting at

twistedtoy92 · « **Reply #12 on:** May 21, 2007, 02:00:48 PM »

just stripped the hub gear and broke the passengers birf on the 85.... but thats spooled and 33's..... spools up front suck, whoever put that in needs a

goin with lockrite and chromoly hub gears... maybe longs if dad wants em.... cant beat the lifetime gauranteee!!!

longfields are nice...........

jb1981 · « **Reply #13 on:** May 21, 2007, 02:20:42 PM »

79coyote: yes, i'm running dual cases as well.

Gewehr43 · « **Reply #14 on:** May 22, 2007, 11:38:42 AM »

What about 35's Dual 2.28s and a Trutrac up front. I drive easy. Should I upgrade?

Yota Up · « **Reply #15 on:** May 22, 2007, 02:04:56 PM »

I got 35s on both of my trucks.
My buddy has 37s on his truck.

All stock birfs. As long as you're not locked in the front, you should be alright.

MiniSimp · « **Reply #16 on:** May 22, 2007, 02:26:17 PM »

Quote from: oldyellercj on May 19, 2007, 01:18:23 PM

MINI is runnin 36 " IROCS w/ an aussie in front and he hasnt had any problems yet....

Correct, they measure out 36.8" off the wheel, 36" on the ground.
According to interco the 37" IROK's measure 36.5"

wierd.

Quote from: DirToyBoy on May 19, 2007, 01:49:02 PM

i thought mini had longs? no?

Nope, running 22 year old birfs. Carry some 24 year old birfs for spares.

And yeah, Aussie in the front/rear.

AaronB · « **Reply #17 on:** May 22, 2007, 02:44:09 PM »

im running 37" tires with stock birfs and an arb up front, i have only took it out once but it held up great even when having to use the skinny pedal. im sure it wont last forever but its doing great so far.

harley1615 · « **Reply #18 on:** May 22, 2007, 03:51:33 PM »

I am running 37" tires with true trac up front and I have broke both sides. I went to Longfields and I have never had a problem since. On the otherhand my buddy has 38" boggers and a small block in his yota with stock birfs and has never broke one. I think it all depends on when they want to break!!!

TRHS1980 · « **Reply #19 on:** May 22, 2007, 05:44:56 PM »

Quote from: harley1615 on May 22, 2007, 03:51:33 PM

I am running 37" tires with true trac up front and I have broke both sides. I went to Longfields and I have never had a problem since. On the otherhand my buddy has 38" boggers and a small block in his yota with stock birfs and has never broke one. I think it all depends on when they want to break!!!

I think that's a good point. You're rig may be setup so that the odds are stacked against you, but there is a bit of luck that decides when a birf is gonna go.

beater82 · « **Reply #20 on:** May 22, 2007, 06:14:48 PM »

3 runs on the 'con and numerous other trips and I finally broke a right side "poo-field" in front of my shop showin' off. Tires turned in reverse= BOOM. I'd upgrade as soon as possible. Especially with 37's and a locker.
I'm runnin' 35's and a lock rite and I drive like a pansy.

85RUNR · « **Reply #21 on:** May 26, 2007, 08:24:42 AM »

I've been running 37s on stock birfs for about a year and a half. I have an ARB in the front and try not to beat on it too bad when it's locked. I'd recommend carrying a spare and start saving for some longs if you plan on wheelin it hard.

lethe · « **Reply #22 on:** May 27, 2007, 12:29:15 PM »

maybe they hold up better with 37's then 38's?? i was driving over a log in first with 4.70's in my t-case at a crawl and the drivers side went boom.

twistedtoy92 · « **Reply #23 on:** May 29, 2007, 02:46:53 PM »

oh man that looks nice!!

90toy · « **Reply #24 on:** May 31, 2007, 08:07:37 AM »

cool man, nice carnage!!! i think i may go with 36" tsl's instead of the irocks. thanks for all the comments.
where is the best place to get longs?? i live in canada so it would be better if i can order from canada. what should i not buy?? thanks!!

MiniSimp · « **Reply #25 on:** May 31, 2007, 08:53:14 AM »

I'm running stock birfs and was doing front burnouts in 3rd gear low low last weekend after I broke my rear driveshaft and didn't have any problems. 36Irok.

Matty · « **Reply #26 on:** May 31, 2007, 09:33:46 AM »

im on 36in Iroks locked up front with stock birfs for a while and i was fine.

twistedtoy92 · « **Reply #27 on:** May 31, 2007, 11:28:23 AM »

http://www.toyotasuperaxles.com/
located in Washington state!! get the first set on the page, the 30 spline set and then get the chromo hub gears while you are at it!! then you shouldnt have anything to worry about!

MiniSimp · « **Reply #28 on:** Jun 01, 2007, 10:50:08 AM »

Here is a video of my stock birfield test.

lethe · « **Reply #29 on:** Jun 01, 2007, 08:28:40 PM »

if your not going to be driving on the street much i would get iroks. the rubber is a lot softer then the tsl/s and they kick ass in just about everything. i dont really have any complaints about my tsl's though, i just liked my iroks better.

90toy [OP]

90toy [OP]

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