CV Axle Flange Issues

SYO237

SyTy Registry
Im having an issue with the CV axle flange (drivers side) that the CV axle bolts into and that goes into the front diff. For some reason, the flange keeps popping out of the diff under very low speeds (10 mph or so). Not sure if it pops when going straight or when I go into a very shallow turn (think lane change).

Some background to the story:

Drove the truck to Nats, beat on it and drove it home. Parked it in the garage, zero probs. Ran great. Didn't touch the truck from that point on. Back around Nov, I decided to finally do my C5 brake conversion so I pulled the truck out of the garage, and backed back into the garage. I also decided to put in my new AFCO shocks in all 4 corners. Conversion went fine other than accidentally ripping the boot on the driver side CV shaft. I have a lifetime warranty on them, so before I finished the brake conversion, I changed out the axle. No biggie.

I take the truck for a slow test drive around my neighborhood to set the brakes before going out on the street. Truck feels normal other than getting used to the stiffer AFCOs. Decide to go out to an abandoned parking lot about a mile from the house just so I could do some figure 8s and tight turns to feel the shocks. When I turned the wheel full to one side, I would feel a light clunk then nothing. When I went full opposite turn, again Id feel one clunk and nothing. My initial thought was the shocks. Called Tom @ Sportmachines and sure enough, I didn't have the spacers to put into the mounts to keep the shock from sliding back and forth on the mount bolt...hence my 1 clunk when I turned either direction.

No big deal, so decide just to drive home at this point. The stretch of road is 45mph, i probably got up to 50mph. Before I turned back into my neighborhood, I started to feel a weird vibration on the driver side, exactly like if you had a flat spot on a tire. Immediately slowed down and babied it into my garage thinking I just broke something on the brake conversion.

Ripped the driver wheel off and started to inspect all the bolts and suspension. Then I saw diff fluid dripping and saw that the flange had popped out of the diff. At this point, Im thinking since I had to change the CV axle, I wonder if I had accidentally pulled the flange out and didn't notice. Yanked the CV axle out and other than a bit of chewing on the outer edges of the splines from when it pulled out and I was still moving (they got slightly rounded on the very edges) on the flange and the C clip, everything looked fine. I even went as far as to remove the diff inspection plate and everything looked normal from what I could see.

So, put the inspection plate back on the diff, let everything dry and put the axle flange back in.....BUT, I was able to very easily pop it back out. Shouldn't do that. Harmon threw a C clip in the mail for me, but meanwhile I decided to take the one off the flange and give it a little stretch and try it again. This time, it held in even with me everything I could to yank it back out. Put it all back together....take it down the street slowly.... and the f*cker pops back out under low speed.

Group of us come to the conclusion that the only thing that majorly changed was the CV axle swap. OK, so maybe I got a sh!t replacement and it was to short, putting excess pull on the flange to pop it out. No prob, get another....lifetime warranties kick ass.

I just put the new NEW CV axle back in. I even put on the new C clip I got from Harmon on the axle flange. Put the truck on the ground, turned the wheels fully each direction a few times before even moving the truck. Check the flange, still in...but it does have about 1/8" of play in and out. Should be normal right?

Took it down the street at very low speed and the damn thing just popped out again.


So, at this point, Im lost on what the cause is. Ive checked the xfer case test to ensure the vicious is not locked. Everything spins and moves as it should. How in the F can I drive to Bowling Green and back with zero probs and now suddenly my flange won't stay in the diff?

Now, I just realized that during the brake conversion, I didn't reinstall that stupid ABS sensor ring back on seeing how I don't have ABS on the truck. Im thinking that a 1/16" thick spacer wouldn't cause this sort of prob, right?

Im up for input here. I'll be honest, I really hope I don't have to pull the front diff...cause Im gonna flatbed the truck back to bowling green to where I know a good size hole in the ground is and drop it in.
 

Captain Morgan

Moderated User
Re: CV Axle Flange Issues

The reluctor ring goes around the CV axle, it shouldn't take up any gap between the stub axle and the bearing itself so it shouldnt matter that it has been removed.

Having a lifetime warranty, I'm assuming its a reman shaft?

My next suggestion for you being you have access to some local SyTy owners would be to swap an axle out of someone elses truck and perhaps swap yours into there, test and see what the results are.

I replaced an axle on an AWD Volvo a while back, owner was convinced his OEM one was causing a vibration, so he bought an axle through one of this friends, brought it to me to install. I put it in, backed out of the garage, turned the wheel, went 2 feet and BANG, axle popped out of its socket inside the boot and twisted that shit up. Pulled it back in the garage, pulled the axle, pulled the boot, repaired the axle, then compared it to the OEM. To my best estimate, it was 3/4" shorter than the OEM.

Part number crossed over correctly, so I don't know why it was different, but I ended up ordering one through NAPA and it was much closer to the OEM, installed it, no problems at all.

Point of the story, not all remanufactured parts are the same. If you got it from Autozone like you did your thermostat, I'd say thats your problem :lol:
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

If you got it from Autozone like you did your thermostat, I'd say thats your problem :lol:

The one that was in it when I ripped the boot was an AZ reman and had been in it for years. So, now 2 in a row are sh!t too? I found Ian's thread where he was having issues finding a correct sized shaft and the replies were mixed with issues/no issues with remans.

I guess I could yank the one out of the truck now and go compare it to a brand new shaft instead of a reman. At this point, I shouldn't be surprised if they are different lengths. It's probably the result of all of us who have to cut the axle nose to fit on the center cap covers and returning them under warranty. The shorter shafts are finally catching up on the market. :D
 

JSM

Active member
Re: CV Axle Flange Issues

The retainer clip on axle flange is bad, did Hamoron give you a new clip or just a used one from his junk pile?

Did it get distorted installing it?
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

The retainer clip on axle flange is bad, did Hamoron give you a new clip or just a used one from his junk pile?

Did it get distorted installing it?

We thought the same thing initially with it being bad. Harmon gave me one from a truck with about 30k on it. It looked brand spanking new. Pretty sure I didn't distort it during installation. I placed it evenly on top of the splines and pushed it down evenly into the groove.

What is odd is that I put the flange in and grabbed onto it placing one foot placed on the sway bar and the other foot on the torsion bar and pulled as hard as possible. It doesn't come out...like it should be. So why the hell is it coming out so easily going down the street at low speed?

Next up is reinserting the flange and taking out the propshaft to see if my VC is working or locked up. Testing it out on jackstands with the wheels up and chocked, it seemed to be fine. But at this point, Im willing to recheck anything.


I've got a brand new axle clip if you need one. LMK

Sure, I'll take it Graham. Or if you have a part number, I'll go grab one at the dealership up the street. Either which...



By chance, if someone has a driver side CV axle out of their truck, if they could stand it straight up on the inner shaft end (so it's compressed) and measure the length of it. Id like to compare it to the one currently in the truck.
 

Captain Morgan

Moderated User
Re: CV Axle Flange Issues

Do you have access to a lathe?? maybe it wouldn't be a bad idea to see if the flange is somehow bent?
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

Do you have access to a lathe?? maybe it wouldn't be a bad idea to see if the flange is somehow bent?

Hmm, I dont....but if I found a flat surface and set a level on either the end, might be able to see if it's bent?
 

graham1524

Well-known member
Re: CV Axle Flange Issues

Sure, I'll take it Graham. Or if you have a part number, I'll go grab one at the dealership up the street. Either which...



By chance, if someone has a driver side CV axle out of their truck, if they could stand it straight up on the inner shaft end (so it's compressed) and measure the length of it. Id like to compare it to the one currently in the truck.

On the way, also my shaft was 19 inches upright and compressed
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

Alright, so yanked out the CV shaft and flange again. Took some pics of the inside of the diff. Looks fine to me?

http://www.flickr.com/photos/8085774@N02/13045155223/

http://www.flickr.com/photos/8085774@N02/13045025605/

http://www.flickr.com/photos/8085774@N02/13045165513/

Measured the CV shaft and its 19 1/14". Looks like it's the correct length. So, my game plan now is to install the brand new C clip that Graham kindly sent and reinstall everything...BUT I will be pulling the propshaft before I drive it. If the flange stays in, I'll put the p shaft back in and try it again.
 

Captain Morgan

Moderated User
Re: CV Axle Flange Issues

Adam, can you mount your GoPro down there and watch for when it happens? watch for wobble in the flange or just see when it works itself out?
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

Adam, can you mount your GoPro down there and watch for when it happens? watch for wobble in the flange or just see when it works itself out?

Yup, probably could rig something up.

Had the thought of putting the truck on all 4 jackstands, starting it up and putting it in gear (no throttle) and turn the wheels back and forth to see if it would come out as well....save me the headache of babying it back into the garage if it does do it again. Wondering though if having the suspension unloaded and hanging in the air would make a difference?
 

Captain Morgan

Moderated User
Re: CV Axle Flange Issues

Yup, probably could rig something up.

Had the thought of putting the truck on all 4 jackstands, starting it up and putting it in gear (no throttle) and turn the wheels back and forth to see if it would come out as well....save me the headache of babying it back into the garage if it does do it again. Wondering though if having the suspension unloaded and hanging in the air would make a difference?

well if youre going to pull the proshaft anyway, perhaps doing....

Test 1 : On jackstands, propshaft in

Test 2 : On street, propshaft out

Test 3 : On street, propshaft in
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

Small update.

Slapped everything back together, included the new C clip on the flange. Before I even dropped the truck back on the ground, I grabbed the flange and gave it a good shake. I was able to move it in and out (normal) but also in an up and down motion too. Not as much as in/out but it seemed excessive.

Grabbed the passenger side flange to compare.... same amount of in/out movement, but basically had no up/down movement.

WTF.

So... the scenarios that make sense to me...

1. The teeth on the end of the flange getting rounded from the first time it pulled out is causing excessive play....so the flange is F'd. Need to get another.

2. The needle bearing is F'd

3. The inner gear that the flange meshes into is F'd, which means my front diff is F'd.


If you have any more "F'd" scenarios to add, by all means......
 

SYO237

SyTy Registry
Re: CV Axle Flange Issues

The owner if F'd up!

That was already assumed. :tup:

Im still confused on why this is all suddenly happening after driving it home from Nats and no problems. Do the brake swap which doesn't even have anything to do with the flange or front diff and now shit is broken. :rant:
 

RealFastV6

@jb_and_his_coffee
This happened to the guy I got my truck from a number of times. After fighting with it for over a year he got a new front diff. No idea what's broken but at some point who cares- get another one.
 

canadian

sy in progress
Re: CV Axle Flange Issues

It's all that left and right turning from the autocross. Shit wears out over time.
 

JSM

Active member
Re: CV Axle Flange Issues

you can pick up a junkyard diff for $150 or less, might be worth a shot, not a horrible job to change out, 4 hours or so on jack stands.
 
Top