Author Topic: Will my transfer cases survive with 47 inch tires??? (Read 6648 times)

JJtruggy · « **on:** Apr 05, 2012, 03:21:29 PM »

Rebuilt 3rz motor
Rebuilt w56 trans
21 spline 2.28 crawl box
21 spline 2.28 crawl box
21 spline 2.28 main case

I am currently building a dana 70 rear axle with 7.17s and a front dana 60 that will run a dana 70 7.17 ring and pinion,
I chose the low gears to help "alleviate" the pressure on my ouputs and such in my cases...

I want to run 47 inch LTBs

So opinions..? I know I need to upgrade my outputs even with the 7.17s making life a little easier.. Can they survive 21 spline?
Should everything be upgraded to 23 spline?

yotaneck13 · « **Reply #1 on:** Apr 05, 2012, 04:06:19 PM »

21 spline def not first time you stand on the skinny pedal its gonna gernade even 47's with 23 spline is sketchy

83 Crawler · « **Reply #2 on:** Apr 05, 2012, 04:07:52 PM »

whats up jj, but i think your going to blow stuff up left and right

JJtruggy · « **Reply #3 on:** Apr 05, 2012, 04:11:25 PM »

Who is this? I dont drink and wheel anymore

so less skinny petal

yotaneck13 · « **Reply #4 on:** Apr 05, 2012, 04:11:53 PM »

y so big of tires and so many cases?

83 Crawler · « **Reply #5 on:** Apr 05, 2012, 04:12:27 PM »

ryan duh,

TacoRunner · « **Reply #6 on:** Apr 05, 2012, 04:13:53 PM »

Quote from: JJtruggy on Apr 05, 2012, 03:21:29 PM

Rebuilt 3rz motor
Rebuilt w56 trans
21 spline 2.28 crawl box
21 spline 2.28 crawl box
21 spline 2.28 main case

I am currently building a dana 70 rear axle with 7.17s and a front dana 60 that will run a dana 70 7.17 ring and pinion,
I chose the low gears to help "alleviate" the pressure on my ouputs and such in my cases...

I want to run 47 inch LTBs

So opinions..? I know I need to upgrade my outputs even with the 7.17s making life a little easier.. Can they survive 21 spline?
Should everything be upgraded to 23 spline?

23spline is the input from the trany, you need to upgrade the output to 30 spine.

JJtruggy · « **Reply #7 on:** Apr 05, 2012, 04:18:18 PM »

triple 2.28s is the same options as duals with 4.7s

2.28 vs 2.28
4.7 vs 5.19
10.7 vs 11.85

And I think triples are different (or less common at least), and I have always wanted to run 47s so why not? They gonne kick ass in snow

JJtruggy · « **Reply #8 on:** Apr 05, 2012, 04:20:58 PM »

Ya Taco Runner read what I put down...

I know i need to upgrade my main case ouputs (30 spline Marlin would be preferable), the output
from the trans (its a W56) is 21 spline but i could change everything else including the adapters to
23 spline

83 Crawler · « **Reply #9 on:** Apr 05, 2012, 04:24:08 PM »

yes you can run 23 spline adapter and 23 spline gears your tranny input will be 21 unless you go to turbo tranny

JJtruggy · « **Reply #10 on:** Apr 05, 2012, 04:25:49 PM »

What up Ryan?

some guy on here had a third gen extra cab with
5vz, duals with 5.0 gears and 4.7 gears, 47s, dana 60s with 7.17s,

AND ALLEGEDLY his cases and stuff survived

JJtruggy · « **Reply #11 on:** Apr 05, 2012, 04:28:52 PM »

yes 83crawler12 I know this my friend...

I know my options on upgrades and what I can and cannot do...

I am looking for opinions? People who have run or seen 44 plus size tires
run with toyota cases and what all they broke, what upgrades they did, etc...

If i was rich I would buy an Atlas or Stak but I really love toyota cases and would
like to figure out a way to build them to last with the 47s... Maybe impossible to do

83 Crawler · « **Reply #12 on:** Apr 05, 2012, 04:29:22 PM »

well try it and get back to use, your going full hydro?

JJtruggy · « **Reply #13 on:** Apr 05, 2012, 04:43:14 PM »

Huh? I still got it sitting on 42s and toy axles so its useable right now!

Just building the dana 60/70 combo on the side in preperation for the
47s, and ya for sure I will be going full hydro!! The 47 ltb's are 160 pounds a tire
WHICH IS A

LOAD it concerns me more than the height

83 Crawler · « **Reply #14 on:** Apr 05, 2012, 05:05:00 PM »

Ya it should be a test of the toyota drivetrain

JJtruggy · « **Reply #15 on:** Apr 05, 2012, 05:28:58 PM »

Ya true...

I hope someone who has previously run 44+ inch tires will give me
their perspective.....

83 Crawler · « **Reply #16 on:** Apr 05, 2012, 05:41:29 PM »

Ask on pirate 4x4

bigarms23 · « **Reply #17 on:** Apr 05, 2012, 11:14:22 PM »

yep upgrade to 23 splines and chromoly out put shafts and have a light right foot it will do fine

IronClad · « **Reply #18 on:** Apr 06, 2012, 10:04:27 AM »

with 7.17s your cases will survive much much much better. Do it, Lots of people around here run retarded big tires (44-54) with stock toyota cases and have minimal issues. Ive got a v8 and auto with stock dual cases on 1tons with 5.13's and 44's ( used to run 39.5 boggers with them) and no issues

JJtruggy · « **Reply #19 on:** Apr 06, 2012, 10:44:44 AM »

SWEET! Thats what I am looking for, people who have run 44s plus and have experienced
either CARNAGE or had the cases last...

Ya I gonna try it and see how it works out! 7.17s and 150hp is what I hope helps too..

Thanks IronClad

SNOW WALKER · « **Reply #20 on:** Apr 07, 2012, 02:12:28 PM »

I have been running 42' TSL's and they are freakin heavy. They weigh in at 107LBS and I ran them for two years in our local mud bogs and top truck challenges. Other than a bent front housing(my fault ran with bent springs and no up travel) I managed to twist the splines on one 27 spline long. That's it, I have around 250Hp with 16lbs of boost. I have marlin 23 spline duels, turbo trans and a Bobby Long output in the rear case. I have 4:88 gears and it's worth mentioning that I am NOT light on the skinny pedal. I am considering the same 60/70 combo with 7.17 gears as well but with 46' claws. They will work WAAY better then the LTB's in the snow and ride down the road better. I think the cases will be fine. I would go for the Bobby Long output and a marlin front output though.

JJtruggy · « **Reply #21 on:** Apr 07, 2012, 02:39:18 PM »

I currently run 42 Iroks and 21 spline triples with no issues.... Gonne do some case upgrades before I get the 47s!

As for the Claws they are great street tire! My rig is a trailer rig and sees zero street ever... The 47 LTB is just a better
off road tire, and I believe it does better in the snow than the claw (from what I have seen)

It looks like I am going to give it a go and just build the cases as stronggg as possible....

Nimyad · « **Reply #22 on:** Apr 07, 2012, 05:32:06 PM »

You should search, guy on pirate running 47s with dual 4.7 cases.
http://www.pirate4x4.com/forum/showthread.php?t=894114&page=8

JJtruggy · « **Reply #23 on:** Apr 07, 2012, 06:51:45 PM »

I have done a lotttt of searching... Trust me...

Thank you though, that was helpfullll!

A guy in Bend, OR runs vortec 4.3, th350, dual 23 spline cases, 60-14 combo 5.38s and 49s...

His build is also on pirate....

If I do 23 spline and the 30 spline ouputs from Marlin I think I will last... We will se...

yota_krawler · « **Reply #24 on:** Apr 08, 2012, 12:13:48 AM »

Quote from: IronClad on Apr 06, 2012, 10:04:27 AM

Lots of people around here run retarded big tires (44-54)...

Ive got 44's

retard.... lmao

IronClad · « **Reply #25 on:** Apr 08, 2012, 05:42:33 AM »

Quote from: yota_krawler on Apr 08, 2012, 12:13:48 AM

retard.... lmao

ya that really stings

Volcom · « **Reply #26 on:** Apr 10, 2012, 11:59:29 AM »

My buddy Dan (dcastell) runs dual 4.7's, 1 tons, and 47's and upgraded to a 30 spline t-case rear output after breaking his 21 spline stuff.
http://www.pirate4x4.com/forum/showthread.php?t=935702

JJtruggy · « **Reply #27 on:** Apr 10, 2012, 01:52:52 PM »

I think that 4Runner is sick... So he runs 4.7 gears in both the crawl
box and the main case???

And ya that 30 spline stuff from Marlin appears to be worth the money!

I have contemplated swapping my main case for a dana 300 (front digs are cool),
but cheaper and easier to beef up with those 30 spline outputs...

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