Rear end damage video/pics
 

Noise started out of nowhere about 1/4 mile up the road from my house, all was quiet then "wrrrrrr" incredibly loud like a coke can stuck in a bicycle tire..

Periodically when starting to back out of the driveway after sitting overnight there would be one light 'pop' in the rear, but I figured that it was just the rear rotors being rusted and stuck.

FRPP 4.10s installed at 40k, j-mod to the trans at 50k, has 81k now. Just have basic boltons and only ran on drag radials for 5 passes one day a few weeks back. Don't know what couldve gone wrong :(



It looks like the damage is only on the spider gears & possibly the side gears on the axles.. if thats the case, can I just get a new spider gear set? I turned the rear over several times and never saw anything wrong with the ring or pinion.

Video of noise:
http://media.putfile.com/Differential-grind

More pics here:
http://s34.photobucket.com/albums/d1...tial%20Damage/

http://i34.photobucket.com/albums/d1...ge/diff010.jpg

http://i34.photobucket.com/albums/d1...ge/diff001.jpg

Guess this means you found somebody to do the work. :jester:

It almost looks like water got in the rear. Rear end oil should not be foamy like that. A lot of times that means there is water in. With that being said...

I would inspect what caused the spider gear to break like that. Its only on rare occasions that they break. Was the slide pin and bolt still intact? Pay close attention to all of your bearings. On second thought, all of them will require replacement since there was alot of metallic flakes in the fluid. Bearings are now contaminated. If you are doing all of the work yourself, pay close attention to everything and see if you can find what caused the gears to break. Sorry if I am repetive about it but spider gears are not common about breaking especially in a auto car.

Yes you can buy just spider gears but you MAY have to buy them from Ford. Actually it probably easier and cheaper to buy another 8.8 tracloc from gefracing since your clutch packs will need to be redone as well. You can buy the whole unit from them for around $250

Actually I dont have anyone to do it, I just took the cover off today since its not driveable anyway. Let me know whenever you will be able to take the job, itll be a few weeks anyway before i scrounge up enough money to pay for it..

I was wondering about the foamyness, didnt seem right to me either.. but if water has been in there, its been for 30,000 miles- thats the last time I ever drove through water deep enough to submerge the rear.

Do you think it would be best to go with stock traclok again or look into aftermarket? I dont have a lot of (or..any, actually..) money to spend on this so I really just need it back to street/strip condition.

I will look into buying a bearing kit and tracloc.. anything else besides that i will need?

thanks lee

I would do stock. If you come up with the extra money to do a 31 spline setup, I would go ahead and do that because the 28 spline traclok and the 31 spline are the same price. Axles run around 250 I believe

Was the correct fluid put back in it when you made the gear change?

that sucks man, i have 2 sets of 28 spline axle i could sell to you cheap. if you wanted to come to oxford one day to look at. just let me know.

Like Lee said: try to find out what caused the breakage. Looks like foreign object may have done it. Maybe a piece of the casting inside the housing? :shrug: I've seen some nasty looking casting flash in some of them. Good luck on the re-build. It's not too bad.

casting flash that took 80k to come loose?? and under normal driving conditions??? stranger things have happened, but imo this is a unlikely probibility. i would tend to agree with the foreign object, or even the water or moisture issue. i guess it sucks now, since he came out of the closet and all, but now has no way to meet new guys or nothin.....

Odds are for a bearing failure and a ball bearing falling out somehow, or something causing slack allowing the teeth to mesh improperly and break that way.

you might want to leave the whip out, but if she is down :shrug: