06 LGT 5eat center differential failure at the track. Pics included

As you all know from my previous posts I blew out my center differential while brake boosting at the track a few weeks ago. It let loose on my 5th run while brake boosting.

 

I was able to source a used assembly for a great price. I installed the hexmods bushings in the used one that I have installed.

 

As you can see in the pictures below, the pin that goes through the planet gears sheared off. 2 of them sheared, 2 of them hadn't let loose yet.

 

I found several needle bearings in my pan and case BUT they are NOT from the planet gear needle bearings. As you can see most held up fine and one lost 2 needles which were still contained in the retainer.

 

At this point I do not know what order things failed in. I cannot say with any confidence that the failure was only due to the needle bearings in the planet gears.

 

I never did find the source of the needles that I picked out of the transmission. I have not studied a diagram to figure it out yet and don't really care.

 

I won't be doing any full boost launches. I am going to try and come up with a way to limit boost to 8-10 lbs until I lift the brake.

 

Pictures below for your enjoyment!

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152142_zps47b57114.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152148_zps9af8df8c.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152151_zpsea9834f1.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152154_zpse2703db5.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152158_zps4e6c0167.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152206_zps5605f766.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152215_zps6fbd6d33.jpg

 

 

http://i80.photobucket.com/albums/j193/firehawk618/Cars/2006%20Legacy%20GT%20Wagon/Center%20differential%20failure/20140802_152218_zpsc9e3f53f.jpg

I also installed the RalliTEC transmission mount insert. I went with the hard blue version.

 

I can certainly feel the NVH difference. I kind of like it so far, I can actually feel my car running now vs before it was very disconnected.

That's pretty hard core Chad.

And here's what it sounds like in case anyone was curious. :o)

 

https://www.youtube.com/watch?v=jXLTewYXgtw&feature=youtu.be

Yeah so far so good.

What Rpm were u launching off of? and psi?

Around 18psi, not sure on the rpms. It was wherever the torque converter held it. I will pull up logs tonight and post exact numbers.

Cool my best 1/4 was 13.89, I tell ppl 13.8 though lol. I'm just stage 2 catless work up, CAI, tunned by infamous. Just bought a 15' wrx. So I'm keeping the new car stock n plan to open the gates for my legacy. I plan to hit the strip Friday n came across ur forum, I brake boosted with my best time too of course but now I'm apprehensive about going all out since I don't have the knowledge/experience of fixing the shit I may break. 1-2 hard runs shouldn't hurt right lol

 

I'm wondering what exact components can I add to reinforce that cdiff n trans?

Any word where the bearings came from?

Any word where the bearings came from?

 

Nope, I haven't done any research. So far all is well.

And here's what it sounds like in case anyone was curious. :o)

 

https://www.youtube.com/watch?v=jXLTewYXgtw&feature=youtu.be

 

wow that's brutal.

 

were you releasing the brake when that happened, or did it happen while trying to hold the power?

Did it while holding the car still.