Precision Gear Power Brute Pic

[SilverMk2]

I snapped a couple of pics of the Power Brute LSD for those of you that are curious here;

http://www.pbase.com/silvermk2/inbox

I ordered mine from Reider Racing for $550 + shipping. I'll probably take it up this Friday to get the rear end rebuilt. Talking to the Reider Racing guys they say without a doubt its stronger than a Truetrac. I sure hope my sub 18 second MkII won't break it :D . I don't think I'll be able to use the factory diff side bearing sizes on this like the Truetrac. Journal diameter is 50mm, I guess the MkII ones are 45mm. Darn thing weighs a ton as well. Probably will cost me 5 rwhp :( .

I took my factory diff out and it looks like one of the springs on the factory LSD is broken. I can't see much more than that with it assembled. Quite a bit of metal shavings came out as well, especially considering it hasn't be in there more than 500miles on it since install.

[jdk_ii]

Very nice.

Can't wait to hear how well this diffie works.

Take some measurements if you can.

[SilverMk2]

What do you want measurements of?

[williamb82]

well, just so you know the spider gears in the power brute are not forged, and every diff i broke it was the spider gears that let go. it should work fine on your mkii, but till you start running 12's or lower you wont be able to really test it out. i need to get an mkii to put the 7mgte from my 84 in so i can put the true trac in and go for 11's.
william

[jdk_ii]

What do you want measurements of?

End-to-end, bearing mount diameter, case width (minus the bearing stubs).

When I contacted them, they mentioned the spider gears were not forged.

They could not specify the alloy content, so it's difficult to evaluate the strength.

Cast alloys do have the benefit of being a bit more impact resistant (they are soft), but will "exploded".

Forged is much stronger, though it does have a snap point.

[SilverMk2]

In case anyone is curious here is what it looks like installed;

http://www.pbase.com/image/18331930/large

Sorry Jim I didn't get the measurements, but the bearing journals were indeed 50mm (same as the TrueTrac). All the sizes were pretty much identical to the stock unit Sean at River City Diffs installed it for ~185 (labor and the 2 side bearings). I'd say the total cost on this diff rebuild was ~$950 or so ($50 rearend + 550 diff + 150 rebuild parts + 185 for install + taxes, shipping, etc). Hopefully I'll get it installed this weekend and give an impression. Its been pretty darn hot around here lately. I'm not looking forward to this part.

[jdk_ii]

Schweeet!

It's abundantly clear that angular trajecectory is important when
re-installing.

Mine was done on a lift with a transmission jack.

First attempt didn't.

A bit slower 2nd time and getting two diaganol bolts in the top really helped. Then it was like butter...

[cheappower82]

Sexy :humpleg:

That's a great choice; wish I would've held out and bought one instead of the True-trac.

[justcallmefrank]

I understand that this thing should be stronger than a Truetrac if it was designed for strength, but how weak can the Truetrac be? Has anyone ever broken one?

[williamb82]

not yet, but i havent been able to launch with one yet. as soon as i get another mkii to put my 7mgte and true trac in ill take it to the track and hopefully nothing breaks.
william