how strong.....

[young-pathy]

are the stock 1990 nissan pathfinders rear axle assembly and axles?

will they support a 37 inch tire?
:confused:

[CurleyMan]

Yup Bill has been turning 37s for a couple years now. The king broke a shaft with 38.5s after shockloading it.

[Bill Potter]

They do well...A couple of members here have watched me bounce mine pretty good at 4000rpm's with both axles locked and a 200:1 final drive. (Not saying I wasn't worried)

The weak spot is the shafts....I think the king broke his when he got hung up....so all the power was going to the one hung up wheel.

Somewhere... Ryan has posted up the shaft sizes...just remember the size is not the only factor, type of steel, hardening process, and axle design all effect the strength. No one has been able to find any test results on the Nissan axles so we can only guess at the strength.

Due to the cost of gears it may be better to go to something else (d-44 or ford 9). If I ever bust mine I suspect I will be upgrading to something else.

[bogof]

I know of a guy(Bobby Long) that has an axle shaft breaking machine to test strengths. If someone had a spare shaft they would be willing to part with it would be nice to get some real numbers. He measures amount of twist, and ft/lb taken to break it. It would finally put all this info out there with numbers instead of speculation(without the numbers there is no way to say they are as strong as a 9in or D44). I do think that they are strong enough to hols up to lockers and 35's. Plenty of people have proved that, and many others have proven that 36's and 37's can work too.

I have only heard of a handful of people breaking them, but I like numbers.

Here is the info I can find in a quick search.

IIRC the Yukons broke the machine they were that strong:eek:


Product................................ft-lbs....degrees

Yukon 4340 Dana 60 35 spline............12,000.....130

Stock Dana 60 35 spline..................6,500......35

Yukon 4340 Dana 44 30 spline.............5,800......35
Stock Dana 44 30 spline..................5,000......35

Yukon 4340 Birf Elim 30 spline...........5,000......50 (ear failure)

Longfield 4340 30 spline used............8,500.....175 (shaft failure)
Longfield 4340 27 spline.................6,500......75
Stock Toyota Birf........................4,200......45
Profield Birf............................3,500......30

Toyota Front Inner axle, 27 sp Stock.....5,000......45
Toyota Front Inner axle, 27 sp 4340 Pig..?,???......??
Toyota Front Inner axle, 27 sp 4340 Long.?,???......??
Toyota Front Inner axle, 27 sp 300M......7,000......??
Toyota Front Inner axle, 30 sp 4340......?,???......??

Toyota Rear Axle Shaft, Stock............6,500.....110
Toyota Rear Axle Shaft, Superior 4340....7,600.....160
Toyota Rear Axle Shaft, PIG 4340.........?,???......??

Toyota T-case output shaft, Stock........2,500......65
Toyota T-case output, AllPro 8620 .......2,500......60
Toyota T-case output, Marlin Treated ....2,500......10 ?
Toyota T-case output, Longfield Treated..2,500......20 ?
Toyota T-case output, Longfield Treated..3,000......48 ?
Toyota T-case output, Longfield 4340.....4,000......25

Warn Locking Hub (for Toyota axle).......5,000

Toyota Hub Gear, Stock...................5,800
Toyota Hub Gear, Longfield Treated.......6,800
Toyota Hub Gear, Longfield 4340..........7,500

Toyota Drive Flange, Stock...............6,000
Toyota Drive Flange, Longfield 4340......7,500 (broke 6 - 5/16" bolts)

I know these are Toy parts, but If you know Toyotas you know Bobby Long and longfields.

Sorry for the hijack, but I just wanted to hint that we could get real numbers if someone would send in a shaft or two.

[Packman5280]

shit i'll go pull one from the junk yard to send to him, they aren't that expensive.

[theking]

Here I am killing an H233b. lol 37's, Lockright and t-case gears.
http://www.youtube.com/watch?v=Ms8BnNji4NY

My bro broke his, too, on 35's going up something we shouldn't have. lol

It all just depends how hardcore you wanna get. ;)

[CurleyMan]

my bad I thought ya had 38.5s. Well that answers the question.

[DamnHippie]

To get a number you can believe you'd need to test more than one sample shaft. Three would be good, but even two would be okay.

[Bill Potter]

I actually have three 31 spline drum brake shafts...2 just need disassembled. I think I also have a c200 shaft (not positive what it is).

[DamnHippie]

I'll take one of those 31-spline shafts as a spare if you ever need to get rid of them to make space or anything.

Also, I have a spare pair of 33-spline shafts if anyone around here ever breaks one.

[Bill Potter]

Ian...they are from a hard body....and are not long enough... for your axle!

(somehow I can't make that sound right)

[DamnHippie]

Oh. Well, I like hardbodies, but... size matters!

[tbecktold]

I have a whole HB C200 I'd be willing to donate parts off of for this experiment, but no H233b shafts to donate.

[bogof]

I sent him a message asking what it would take to get this done. We'll see what he says.

He will probable need a way to anchor the axles. Here is what the machine looks like.

http://pirate4x4.com/forum/showthread.php?t=467075&highlight=axle+breaking+machine

It's about halfway down the page. I can't link the pics here.