OBX LSD: 568 vs 523

[Murphy]

I have a large spline A568 and an OBX LSD. From what I understand, to install the OBX in the A568, you need to swap in A523 internals so you have the correct differential gear. So, would it really be worth it to go with a A568? or would a the OBX in a A523 be just as strong?

Thank You

[Frank]

Actually you just need to swap in the 523 ring gear and intermediate shaft. This will give you a superior 568 as it will have a taller gear ratio.


Frank

[DodgeZ]

It will become a523 with a568 gears. You have to use the 523 input shaft and main shaft.

[Frank]

You dont need the 523 input shaft, especially if you have a large spline. Just the intermediate shaft which the guy that run the ring gear.

Frank

[DodgeZ]

You dont need the 523 input shaft. Just the intermediate shaft which the guy that run the ring gear.


Frank

you are right I was confused.

[2.216VTurbo]

I' putting 300+ HP and 350+ftlbs thru my OBX 523/hybrid and it's happy so far. I can't tell the difference between the Quaife and the OBX by driving them, they both work seamlessly to lay power to both wheels Fantastic mod for any FWD making more than 250 HP or so...

[ShelbyMotorsports]

I' putting 300+ HP and 350+ftlbs thru my OBX 523/hybrid and it's happy so far. I can't tell the difference between the Quaife and the OBX by driving them, they both work seamlessly to lay power to both wheels Fantastic mod for any FWD making more than 250 HP or so...

Alan

Which car did you put the OBX in?

[Mario]

I' putting 300+ HP and 350+ftlbs thru my OBX 523/hybrid and it's happy so far. I can't tell the difference between the Quaife and the OBX by driving them, they both work seamlessly to lay power to both wheels Fantastic mod for any FWD making more than 250 HP or so...

Out of curiosity, do you still stand by this statement. I'm having trouble deciding between the two.

[2.216VTurbo]

Out of curiosity, do you still stand by this statement. I'm having trouble deciding between the two.

Have not dynoed the TC yet but I switched from the Clutchnet DF clutch to thier stage IV six puck ceramic disc with the hi PO PP. Broke it in all careful like for 5-600 miles. now when I get the boost above 17 PSI in 5th, even that clutch wont hold the torque So I cant say what the exact numbers are but they should be in the neighborhood
I had refered to.

Still the OBX has given me no trouble at all and it functions exactly the same (from the drivers seat) as the Quaife in my GLHS

Ill be putting an OBX in my Rampage over the winter

[rbryant]

You dont need the 523 input shaft, especially if you have a large spline. Just the intermediate shaft which the guy that run the ring gear.

Frank

I am a little late to this but actually you have to maintain the 568 input shaft be it large or small. Unlike the main shaft where the gears are attached to it via splines and c-clips and can be swapped out (thus enabling this whole swap) the input shaft gears and input shaft are one piece...

Don't break one of those or things get expensive....


Only 5th gear is independant. So if you happen to break 5th on a 568 then you can take 5th from any 523/543 and mix and match it with the rest of the gearset. The ratios of .71 and .72 are so close that it probably wouldn't even be noticeable.

-Rich

[DodgeZ]

Here is some info on it
http://boostedmopar.com/forums/showthread.php?t=709

http://boostedmopar.com/forums/showthread.php?t=5251

http://boostedmopar.com/forums/showthread.php?t=5397

[Murphy]

Thx for the replies!

I guess i'll use the 568 since its the better trans. I didnt know that the 568 gearing stayed with the tranny, I thought it was just an issue of the casing.

[Frank]

It is a better tranny, but it can be even better when you mix the parts!

[Murphy]

i think this is a good example of the strength of a 568 with a LSD

[supercrackerbox]

i think this is a good example of the strength of a 568 with a LSD

Actually that car doesn't have an LSD.

[iTurbo]

I have an A568/A523 in my Spirit R/T with the OBX limited slip. Final drive is 3.50 (from A523), with A568 gearset. This was all done for me by Cliff Ramsdell. I have not put much power through it yet but I love it so far. Traction is definately improved, especially going around corners it really grabs. I took a trip to Minnesota recently and cruising at 75-80 MPH yeilded about 2500 RPMs on 205/60/15 tires.

I like it so much I bought another one; same but with 3.77:1 final drive for my Shelby Lancer.

[Murphy]

Actually that car doesn't have an LSD.

http://videos.streetfire.net/comment...e9cbd7ce9b.htm

[Frank]

Actually I don't agree. Do burn outs are not much load on a LSD. The load is launching hard on slicks for many drag races... that is a good testament of quality.

[2.216VTurbo]

Actually I don't agree. Do burn outs are not much load on a LSD. The load is launching hard on slicks for many drag races... that is a good testament of quality.

Kind of a sterile reply for such a sweet --- vid don't you think Frank?

Third gear burnouts in an LSD equipped 568 ROCK!!!!

[Frank]

LOL. Ok, so the nice lime light was lost in the comment... it was sweet.