KDavis04ss

iTrader: (16)

I think everyone is just pushing them harder. two to three years ago I remember 400hp was the mark most people wanted. Now it seems like you need 600 to be excited.

What are you thinking foose? Are you going to run it till/if it breaks or go ahead and do a full spool?

tarinitup

iTrader: (11)

I'll let you know how my bolt in 9" comes out next month. I can tell you that waiting till it breaks will just cost you more and be a hassle later.

swift700

iTrader: (3)

G80 all the way!

nonnieselman

iTrader: (10)

Did you see any cracks in the housing or anything like that?

Put a TT in a buddys truck a few weeks ago and the gears didnt look like that.. they were all the same color with no heat treating signs.

time for a 12bolt?
Id hate to see that thing break on you and kill the transmission or something.

TURBHOE

iTrader: (4)

what fluid are you running? full synthetic is too slick and causes the gears to not "hook" so to speak. it tells you that on their web site. i say bigger rear, i snap my rear left axle twice and broke my detroit locker. then i went back to awd.

foose04

iTrader: (3)

I wanted to update this, mainly to keep future 550+HP guys informed that even with above average servicing (4k fluid changes) these unit can fail on you and if your outside of your warranty, your out of luck.

This is my e-mail and response from EATON.

Question: Hi I need to speak with someone in regards to my True-Trac differential installed in my 2004 GMC Sierra. I have some pictures to show wear and I think I have a bad unit. It will be outside of my warranty as it's been installed for two year and around 15k miles. I need to know if the unit needs to be removed and rebuilt or if it's serviceable. Thanks, Rob Melcher

Response E-mail:

Dear Mr. Melcher,

I am sorry to hear about your Truetrac issue. Because of the design of the Truetrac , the gears are cannot be replaced.

Regards,

Barney Gwozdz
Customer Support
Technical Specialist
Phone# (248)226-6234
Fax# (248)226-6740

The unit is still currently installed as i'm still accepting I have to buy another 600-700 locker and eat another 200-300 install fee. Just wanted others to know and good luck!

1FastBrick

iTrader: (17)

There is only a few things you can do to a 10 bolt to make it live. At some point though your going to break it....

If you want to keep the 10 bolt, You can have it checked for straightness first and then have the axle tubes welded to the center of the housing. Every stock 10 bolt housing I have looked at has been out of alignment any were from 1/8 to 1/4 of an inch and in a few cases some were more sever. In a stock application it probably wont hurt anything. but fixing this will help with deflection under load and help with abnormal axle alignment. The further you pull the axles out from center line the more stress you put on the gears within the differential were the axle shaft spline engages.

Why are the like this??? Because the factory only pins them in 3 places. The front, back, and top. That's why straighten them and welding help minimize wear. When you start putting alot of power through them especially with slicks the loads increase expedientially. If the shafts are not held in true alignment then there putting undo stress on all the parts there connected to it.

Studs in the main caps will help along with the TA Style girdle to help keep the caps in place. If the Ture Trac fails after all that, then the only other option would be a full spool.

After that, It's time for 14 bolt or a Custom built Ford 9 inch.

slow67

iTrader: (2)

What about trying a valuetrac and seeing if it has a similar service life as the much more expensive truetrac (same design).

Ferocity02

iTrader: (59)

I put a Valuetrac in a couple weekends ago but haven't gotten a chance to beat on it. It isn't that much cheaper than a Truetrac, ~$50 or so difference at Ron's.

nonnieselman

iTrader: (10)

have you thought about a Eaton LSD?
atleast they are servicable pretty easy