i,m using heavy duty axles(won't say company name) and i have already broken them 4 times, any idea what is happening.

 

what mid shaft and what axles... ill tell you what axles we have been breaking.... no bashing **** happens

 

How much power are you making (if you wanna say), what are you launching at, and what size tire/slick? I assume you're breaking them launching? DSS? We've broken many of their stage 5's too and with not a whole lot of power. hehe

 

Are you using any sort of wheel spacer? are you preloading the drivetrain before launching? How tight do you torque your axle nuts, or do you just hit em with an impact gun? Is anything loose or 'shaky' in the suspension, steering, or balljoints?

 

I am using a 1/4 inch wheel spacer,im launching at 7900 rpms with 7psi in the tires on a 26x8.5 m.t. with a little over 600hp. the axles keep breaking right at the hub,clean off the cv

 

and level5

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aggressivemotorsports &raquo;</TD></TR><TR><TD CLASS="quote">I am using a 1/4 inch wheel spacer</TD></TR></TABLE>
They are aluminum? If so, that right there is likely your problem... are you having a problem bending wheel studs as well?

 

No never bent a wheel stud.

 

im going to be running a small spacer as well... do these cause problems?

 

ok, but are the spacers you use aluminum?

You also didn't answer if you preload the transmission or not... also, you didn't answer how much torque you use on the axle nuts, or if you just impact-gun em down...

Tryin to help, but you have to answer the questions... I've worked extensively with an axle manufacturer here locally in the past on breakage issues, so i'm quite familiar with certain things that can cause a high-staged axle to break, even with low HP cars. I've seen a 600+hp axle consistantly be broken by a 350hp car... in the end, the culprit was a combination of wheel spacers, and too high of a torque setting on the axle nut.

 

yes i always preload the trans.and i do hit the lugs with an impact gun,and they are aluminum spacers. maybe i need to run more air in the tire?????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dmoto &raquo;</TD></TR><TR><TD CLASS="quote">im going to be running a small spacer as well... do these cause problems?</TD></TR></TABLE>From what i've witnessed and dealt with, the aluminum spacers do cause problems... they don't allow the wheel to properly torque down, and they also slip a lot easier, causing the wheel to shift on the hub... that slight shifting is enough to cause a large spike in the stress on the joint when it stops its shift movement... this spike in the torque is what causes the axles to break.

One solution that i've seen work quite well was to take a spare brake disk, and lathe it down so that only the hub remains, and use the disk as a spacer. Not sure if i would attempt this on my own car, but i might if it was also securely dowel-pinned to the actual disk.

I'm going to be dowel-pinning my wheels to the disks, and then the disks to the hub on my race car

 

Hey Hector, this may sound weird, but its worth a try.

If you welded your extended studs to your hub, check your hub, because i have somewhat experiencd that problem before, and even the slighest bit of too much heat will warp them and will make for hell on your axles. It will also put mad strain on your intermedate shaft bearing if applicable.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aggressivemotorsports &raquo;</TD></TR><TR><TD CLASS="quote">yes i always preload the trans.and i do hit the lugs with an impact gun,and they are aluminum spacers. maybe i need to run more air in the tire?????</TD></TR></TABLE>
No, more air in the tire won't help it... you need to first not use an impact gun to install your axle nuts... use a torque wrench, and the axle manufacturers specific recommended torque pressure. This may vary, but believe me, it DOES make a difference.

Next, get rid of the aluminum spacer, and at least use a steel one... also, may want to look into dowel-pinning them, as per my previous post.

 

Make sure the axle fits snug into the hub and is not being held back by the bearing. If it does not pull all the way into the bearing they can break at the hub. Had a friend who kept breaking axles on his civic until we figured this out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ComposiMo &raquo;</TD></TR><TR><TD CLASS="quote">
No, more air in the tire won't help it... you need to first not use an impact gun to install your axle nuts... use a torque wrench, and the axle manufacturers specific recommended torque pressure. This may vary, but believe me, it DOES make a difference. </TD></TR></TABLE>

hes right

 

Thanx guys im going to try most of this stuff today,i just got another axle so i will torque the lugs,get rid of the aluminum spacers,but first i'll check the hubs and bearings.and definitly gonna do the dowel pin thing.

i appreciate the help guys.

I,ll let you know what happens today, it's gonna be my last day out for the season.

Wish me luck.

 

good luck, im trying to swing by the track after work. see ya there

 

Cool.... good luck with it... make sure you torque the axle nut to whatever the manufacturer suggests, not just the lug studs

 

most likely your problem is how you torqe the axle nut, overtorqing them is normally the cause of snapping the spline flush in the hub.

 

Is the car properly Aligned?

 

Well guys i took everything into consideration,and i guess it worked.
took the car out on sunday to englishtown and didnt snap an axle,the first pass we went 10.6 at 147 with a 2.0 60 ft cause we were messing with the antilag,second pass turned off the antilag and went 9.86 at 136 with a 1.60 60ft.the low mph was due to breakup in 4th gear,(car needed more fuel).

Thanx guys.

 

which car is yours? got any pics of it ?

 

Congrats! Glad that it worked out for you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote">which car is yours? got any pics of it ?</TD></TR></TABLE>

you can go to vwsport.com,goto movies, look under honda videos,we are under aggressive motorsports,lots of videos there.our first 9sec run was at survival series. we looked over the car this morning the popping was due to the car running out of fuel.