New JHM rear LSD?!?

[Spike00513]

..

[thaifoodninja]

inb4 demands for dyno slips

[junxing]

Would this compliment/conflict/be redundant/be better to EDL?

[walky_talky20]

The insides of this diff have got to look really awesome. But no pics?

[LINDW4LL]

Would this compliment/conflict/be redundant/be better to EDL?

EDL is simply a handicap for the stock open diff, a way to transfer power to the other axle when it otherwise woudn't be possible. So it's not necessary with an LSD.

EDL would just be redundant I think.

[Charles.waite]

I wonder how this compares to the Wavetrac...

[Knives1010]

I wonder how this compares to the Wavetrac...

This was my exact thought. I'd like to see video of the two side by side on some kind of windy road


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[evo_ski]

If I install this can my car do a wheelie?

Thanks in advance. Mods are in my sig.

[Jermunji]

[LINDW4LL]

I believe there is a source for the Wavetrac at $1000 shipped.

Also I know the 944 LSD works in the B5 S4, but are B5 and B6/B7 diff casings the same?


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[redline380]

I believe there is a source for the Wavetrac at $1000 shipped.

Also I know the 944 LSD works in the B5 S4, but are B5 and B6/B7 diff casings the same?


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Don't know if b5 s4 casing is the same as b5 a4, but I know the 944 lsd will go into the b5 a4 with minor modification, so they are probably the same casing.

[drjonez]

Clicky

Hilarious. I happened to be on JHM's site a few days ago and saw that LSD and about flipped out. It is on the list...I'll get one someday.

[UCFQuattroguy]

Let's not get too excited. It's a torsen-style differential (i.e. just like our center differentials and any Quaife differential). It's certainly a step up from the open differential. However, if your suspension setup leaves you prone to unloading the inside-rear at corner entry or mid-corner, it's not really much of an upgrade. A Torsen requires some resistance on each end of it to properly limit rotational speed differences.

Is this the ultimate cost-effective solution for a street driven car? Absolutely. I'm just throwing a bit of caution out there if you do any proper tracking or autocross events.

If that's the case, there is no substitute for a clutch-plate LSD. As an alternative, it seems that the Wavetrac is the best of both worlds. It's a torsen type, but they seemed to have built-in some way to have static pre-load to combat the torsen from going "open" when one side of it gets unloaded...but doesn't have the price-tag of the clutch-plate diffs.

I appologize if this comes off as 'bashing'. That is not my intent. I'm only inserting a bit of know-how into this so that everybody is on the same page with what this product is best for.

*thumbs up*

[drjonez]

Let's not get too excited. It's a torsen-style differential (i.e. just like our center differentials and any Quaife differential). It's certainly a step up from the open differential. However, if your suspension setup leaves you prone to unloading the inside-rear at corner entry or mid-corner, it's not really much of an upgrade. A Torsen requires some resistance on each end of it to properly limit rotational speed differences.

Is this the ultimate cost-effective solution for a street driven car? Absolutely. I'm just throwing a bit of caution out there if you do any proper tracking or autocross events.

If that's the case, there is no substitute for a clutch-plate LSD. As an alternative, it seems that the Wavetrac is the best of both worlds. It's a torsen type, but they seemed to have built-in some way to have static pre-load to combat the torsen from going "open" when one side of it gets unloaded...but doesn't have the price-tag of the clutch-plate diffs.

I appologize if this comes off as 'bashing'. That is not my intent. I'm only inserting a bit of know-how into this so that everybody is on the same page with what this product is best for.

*thumbs up*

Certainly true, but provided you maintain some level of contact, there's nothing better than a helical diff.

[Bische]

Love it. But!

This means one has to have the 4.11 final gear for it to fit? Booo.

[AudiA4_20T]

Love it. But!

This means one has to have the 4.11 final gear for it to fit? Booo.

No, B6/B7 0A3 trans use 3.89 diffs.

[Jake@JHM]

The LSD is pretty bad ass..




When coming out of corners hard you can feel the car hook in the back and the car just goes. Then if you want, you can get some mean donuts going too.

The helical style LSD makes it feel VERY OEM, its so smooth you don't even realize its there if you are driving around like normal. Once you start driving around aggressively, the LSD really makes its self known in a good way. Anyone that tracks their car, drives in the twisties, or even just the occasion spirited drives would definitely enjoy this.

[Knives1010]

The LSD is pretty bad ass..

When coming out of corners hard you can feel the car hook in the back and the car just goes. Then if you want, you can get some mean donuts going too.

The helical style LSD makes it feel VERY OEM, its so smooth you don't even realize its there if you are driving around like normal. Once you start driving around aggressively, the LSD really makes its self known in a good way. Anyone that tracks their car, drives in the twisties, or even just the occasion spirited drives would definitely enjoy this.

I do appreciate the video Jake. I'm curious if you guys would be able to compare it side by side to the Wavetrac LSD. Even if it does not perform as well, your price point is much more reasonable so I would be curious to see the differences and as to if the savings of $500 would be worth it. Seeing as a BBK and an LSD are the only other modifications I see myself doing performance wise I'm very intrigued into your product as I know you guys always produce quality parts.

[PreciseD]

The LSD is pretty bad ass..

[Jake@JHM]

I do appreciate the video Jake. I'm curious if you guys would be able to compare it side by side to the Wavetrac LSD. Even if it does not perform as well, your price point is much more reasonable so I would be curious to see the differences and as to if the savings of $500 would be worth it. Seeing as a BBK and an LSD are the only other modifications I see myself doing performance wise I'm very intrigued into your product as I know you guys always produce quality parts.

No problem! We have not compared it side by side with the Wavetrac, and I don't have any first had experience with the Wavetrac unit. However, our LSD will perform similarly to any other Helical/Torsen style LSDs. Here is some info from our product page:


Features and Benefits of the JHM Helical LSD:
- Helical gears respond to changes in traction conditions very quickly
- Improves traction and predictability of vehicle behavior: both rear wheels will spin at the same rate. Under hard acceleration out of corners or launching from a stop the car will either "hook up" and go or both rear tires will spin. Some "track focused" drivers say that this allows you to steer the car better with the throttle.
- Prevents "one-legging" (spinning one rear tire only) and therefore eliminates losses in acceleration under load out of corners and heavy acceleration from a stop (launching).
- Maintenance free! There are no clutch packs to replace as they wear out.
- No special gear oil or additives necessary. Again, since there are no clutches, you can run the same gear oil as recommended by Audi in our LSD.
- Our JHM Helical Rear LSD comes with a Limited Lifetime Warranty against manufacturer defects.
While we recommend our LSD for anyone looking to improve the traction and predictability of their quattro Audi, the more horsepower your car has or the harder you drive, the more our JHM LSD will make a difference in your car.

Anyone else catch that limited lifetime warranty?

[AudiA4Turbo22]

What are the chances of this bolting up to a B6 A4 Tiptronic? I see it will work on the B6 S4 tiptronic.

[outsider6661]

I fail to understand how some are confused about the fitment....


I've been using a stasis/gaurd unit that I had in my 1.8 b6 5speed (3.89 diff). I later swaped it over to the etq 4.11 diff when i did the b5 s4 tranny.

I now have my stasis etq diff installed my my b7 rs4.

The b6/B7 A4 S4 DIFFS are all physically identical. It's the crown/ring and pinion gears that are different. Etq ring gear has 37 teeth and the 3.89 diffs have 35 teeth . As for the rs they used a smaller diff (weight reduction) and the ring and pinion gears weren't as beefy. The 3.2 fsi A6 also shares the same diff as the rs4.

Hope this clears up some of the confusion in here.

Kudos to JHM for the quality product! Hands down the best modification you can add to a quattro!



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[diagnosticator]

Would this compliment/conflict/be redundant/be better to EDL?

If the rear diff was a torsen type locking diff, the rear EDL will never activate, since the locking diff never allows enough differential speed wheel spin to activate the EDL.

[diagnosticator]

No, but I bet it will understeer more.

[outsider6661]

No, but I bet it will understeer more.

Can you please clarify your statement? Rather confused as when I had my clutch type lsd in my A4 under-steer was drastically reduced.