Ok i am in the market to buy a 12 bolt, I need a list of what i need or what i should order with it....and the pro's and con's ..

The Eng is a 355 T-trim....goal is to make 650rwhp ......so i need something that will hold up.......

thanks

 

We now carry 12 bolt and 9" asssemblies.

Ultimate 12 Bolt $2375.00
12 bolt with 33 spline axles, True-trac differential, 3 channel ABS, TA cover, billet 1350 series Strange pinion yoke, Strange or Motive gears, ready to except your stock backing plates.

If you have any questions don't hesitate to contact us.

 

Thanks..for the info, other then the backing plates will this bolt right in..

What about a drive shaft, (M6) and u-joints
Do i need relocation backets for LCA

 

Yes, elaborate. I am also in the market for an 12b. (not trying to hijack)

What are these backing plates you speak of??
Axles? C-clips (options).. If you bought a "Bolt in replacement" kit would it come w/ it? -the axles that is.



I think you only need the LCA reloc brackets if the car is lowered. I don't think it would hurt otherwise. You shouldn't have to mess w/ the D/S.

 

Driveshaft length will depend on which 12-bolt you buy, the kind of pinion yoke they put on it, and how much power you are putting down. People who have bought the Strange find that the stock DS will work with it. But if you have enough power to require a 12-bolt, an upgraded DS, made to the exact length you need it always a good idea. Install the rear, measure for DS length.

What U-joint you need will also depend on what DS you have and what pinion yoke you use. Logically, you would order the 12-bolt and the DS set up for 1350 joints. Using a stock DS will typically require a "cross-over" U-joint.

LCA relocation bracket need is not based on having a 12-bolt. Its a matter of whether you need them to adjust the angle of the LCA's to the ground. The 12-bolts will have the mounting locations and dimensions same as stock. If you needed LCA relo rackets with your current/stock setup, you will want to keep them with the 12-bolt. I believe that the Moser 12-bolt has a heavier (than stock) bracket for the LCA's, and requires an LCA relo bracket specifically for the Moser. The Strange uses stock mounting brackets.

For any sort of serious drag use, you want C-clip eliminators. You don't want to drag race with C-clips... a broken axle comes flying out of the housing, wheel and tire still attached. NHRA requires C-clip eliminators on any aftermarket rear axle assembly.

For a true "bolt-in" assembly, you want the Strange. It uses all the stock mounting hardware, has axle tubes the same diameter as the 10-bolt, accepts the stock torque arm using the two long through-bolts, or an aftermarket arm using the through-bolts and the stock hole locations. The Strange is fully assembled and run-in at the Strange shop. Comes with the lube already in it. Its a direct bolt-in.

The Moser is a bit differerent.... some people (50%) find they need a shorter DS. The axle tubes are larger so you need new C-clamps for the rear sway bar. The LCA brackets have heavier steel, so you need special LCA relo brackets. The TA mount is offset slightly, requiring an extra set of holes in the aftermarket arms, and instead of using the 2 through-bolts, Moser used 4 bolts that thread into the axle casting, and seem to cause problems by coming loose. The Moser also comes partially assembled, and required that you swap your brake baking plates. The assembly of the axles and housing ends requires shims that Moser often forgets to include.

I would recommend that you order the rear with the 1350 pinion yoke, C-clip eliminators, aluminum rear cover with bearing cap pre-load bolts. A heavy duty posi is a good idea, at least 33-spline axles. I would also recommend that you take the time to understand the options available for the carrier. The True-Trac mentioned above is one option, but you might want to consider something like the Eaton Super Strength posi.

 

Stupid question.... you said that it comes w/ fluid. Do I (anyone else) have to buy a cover?

S.S. posi w/ Reluctor ring or not.(not too sure what that is) I was just checking out the Strang 12b.

Coincidentaly, I bought a BMR adj TA a year ago and it has two sets of holes on the rear mounting point... for anyone's info.

That answerd a LOT! Thanx man!





NOT TRYING TO HIJACK! I need some info too...

 

The Strange is delivered with the correct gear lube and LSD additive installed.

Moser ships in a couple pieces, and requires that you add the lube and LSD additive.... no big deal.
When I bought my Strange, the LPW aluminum cover was "standard". I believe they now charge extra for it.
Strange offers a "standard" strength positraction differential, and a "super strength" setup - more clutch discs, heavier pre-load springs. I would guess that the standard unit would be OK up to 500HP or so. Over that, the clutches aren't going to stand up to the loads.

The True-Trac mentioned by Eric/Victory is a different type of differential, which I beleive uses worm gears.

The "reluctor ring" is what you need to buy if you want to keep your 3-channel ABS system working - its on the carrier. If you have 4-channel ABS/TCS, you don't need it,l but then you need to swap over the reluctor rings from the axles and the wheel sensor/brake backing plates.
Yes, there were a few broken TA's, until people like Spohn and BMR realized there was a dimensonal problem with the Moser rears.

I have an online install procedure for the STrange 12-bolt, if that might clear up some of the questions. Just keep in mind it was written more then 6 years ago, so some of the info (e.g. - aluminum cover being standard) has changed.

http://members.aol.com/InjuneerZZ/Strange12.htm

 

If you order one from Strange be prepare to wait.I ve order mine the 8 of december and still waiting cause there heavy duty posi(the 14 clutch one) is on backorder till the end of february

But i still think thats the best bang for the bucks

And i really suggest you the heavy duty one their is no enough difference in $$$ between the standard one(9 clutch) and the HD one.

The stock posi should be able to take as far as 700hp(thats what i ve read) before failing but why not ordering the stronger one and be mind free.

 

Is there a price diff from the true trac to the"super strength" positraction differential,

Send me a PM

 

I'm curious, do any of hte manufacturers offer ford 9" axle tubes installed so you guys can get away from seal eating C clip eliminators? 4 out of 4 street/strip cars we run with used the eliminators against eveybodies advise about that problem, and in all 4 cars they shortly after started leaking fluid out of the axle seals? Heard of a few other guys having ford tubes pressed into the 12 bolt pumpkin so they have the benefit of staying GM, but the better design for safety of the ford ends.

Or are they just using standard axle tubes and welding updated ends on them to get away from the c clip eliminators?

Not that I'll ever run a 12 bolt, but curious to see what's been done about the axle seal problem and LONGTERM durability.

Josh