I destroyed my differential last friday night. After going at the strip, the diff was whining horribly.

When I flushed the diff oil, I found a few metal chunk, and when I removed the diff, I realised both output shaft seems to be locked together when turning one or the other, and when rotating the input flange, it rotate flawlessly.

I opened the differential and definitely the torsen unit failed. Same thing that happened to S2oooNvegas: https://www.s2ki.com/s2000/topic/485613-failed-torsen

As I'm driving the car very hard when going to the strip, I need something that is stronger. Already got cryo treated Mazda gears and Comptech reinforced housing.

There are two options:

1- Buy a stronger aftermarket diff;
2- Have a new OEM diff cry treated, as S2KPUDDYDAD is doing, and he seems to have a great success.

Option 1:

There are 3 companies that offer helical LSD: Quaife, Mfactory and OBX. Don't even talk about OBX.

Quaife:

- Made of billet steel
- CAD and CNC machined
- Well known reputation, OEM supplier.
- Can't find more information.
- $1200

Mfactory

- Made of Japanese steel
- CAD and CNC machined
- Forged and Cryo-Tempered
- Shot Penning
- Mfactory claims it is 30% stronger than billet steel
- $650


Option 2:

Have a whole diff modified and cryo treated by S2KPUDDYDAD. It seems to work great but I'm sceptical that it would be as strong as an aftermarket LSD.


I would really appreciate your feedbacks about those options. I need to make the right choice, and the lack of information on Quaife website make me doubt about their products, but their price and renown must mean something. I'm conscious that quality got a price, and the Mfactory is almost half the price of the Quaife. Why ?

Thank you for your hints, help and comments.

 

 

In all fairness I thought I remembered reading that despite it being "OBX" the OBX LSD was actually a good unit. I could be wrong; and this could be for a different application.

 

I heard too that OBX seems better than it used to. But there have been so many bad comments, so even with the good ones about their latest products, I wouldn't feel safe each time I'll lauch the car at the line.

I want to make it right the first time.

I'll PM S2KPUDDYDAD.

 

I'd say go with PuddyMod, and if he recommends a <insert brand name here> centre, go with that. His reputation is built entirely on success with the S2000 diffs and he's just waiting for your PM. Can't ask for much more.

 

Also bear in mind (and Puddy will confirm) that what fails in these cars is not the LSD unit itself, but the housing, the pinion gear, and a few other things in the rear end. So, if you put an aftermarket Diff in the OEM housing and do nothing else, there is no increased protection from failure. Whereas the various Puddy diffs (and he makes all kinds with various parts and strengths) will hold up to much more abuse AND you can still add a better diff unit to that (he can even do it for you before he ships it) to make it perform better.