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What's New

JHM C5 A6-S6 w 4.2L T-belt engine 0A3 6-Speed Manual Transmission Conversion-Swap Parts List
$0.00
Specials

Rear Rotors(pair)-JHM 2-piece Lightweight for S6 V10
$680.00
$630.00

JHM Helical Rear Limited Slip Differential, LSD for LATE B7 S4, Manual Transmission
[JHM-B7A4S4LateRearLSDMT]

$1,050.00 $845.00

INTRODUCING THE JHM HELICAL REAR LIMITED SLIP DIFFERENTIAL!!!

After years of research and development, we are proud to release our JHM Helical Rear Limited Slip Differential LSD for the Late B7 A4-S4.

In the stock Audi rear differential, the torque from the motor that's sent to the driveline is evenly divided between the two rear axles. In most driving situations this is normally fine. However, in cases where traction is lost at one wheel (i.e. under hard acceleration out of a corner or launching from a stop) power is only being sent to the spinning wheel. In these situations, a gear-based limited slip differential will take the torque from the wheel that's starting to spin and send it back to the wheel with that's not - the one with better traction. This means that both rear tires will spin together - with or without traction.

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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.

Installation Note: When replacing the differential, the factory repair manual states that you must check ring gear backlash and bearing pre-load. Our JHM LSD is built to factory tolerances and all the differentials we have swapped at our service facility haven't required "re-shimming". However, due to variances in factory tolerances, it is best to make sure that these measurements are checked and confirmed. Additionally, if you do not have the right "bearing splitters" to remove your original bearings with a press, install them on the JHM differential, and correctly inspect for wear or issues you may need to replace the differential bearings. If you have concerns about your tools or your ability to properly inspect and/or disassemble and re-assemble your differential please don't hesitate to contact us. We can perform all of this work for you if you send us your differential housing.

FITMENT: The JHM Helical LSD is a direct replacement for OEM differentials with the following rear differentials with the following 3 letter code: HNP . It is important that your car's rear differential has the correct LATE style housing. If you have the EARLY, please go back one section and select the EARLY style LSD.


- 2007 to 2009 B7 S4 with Manual Transmission and quattro NOTE: The 2007- Up A4 Rear Differentials with the HUQ Diff Code can NOT use this LSD in the HUQ diff. The HUQ has the Ring Gear welded to the differential so it cannot be separated for the installation of the LSD. We can sell you a pre-built core with ETS differential if you go back one section that will have our LSD pre-installed.

**Don't forget to add axle seals and gear oil to your order before you check out!**

For shipping quotes: Please sign in or join then put the items you want in your shopping cart and proceed to checkout.

Fitment:
Note: JHM works hard to make all fitment charts as accurate as possible please read the product description to make sure this is correct for your vehicle.
Make Model - Chassis Engine
AudiS4 - B7 (2005.5-2009)4.2l V8 40v
This product was added to our catalog on Thursday 31 March, 2016.
Quantity:

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Copyright © 2017 JH Motorsports

JH Motorsports is not affiliated with or endorsed by Audi AG, Audi of America, Volkswagen AG, or Volkswagen of American or any other car company mentioned or whose logos are displayed in these web pages or our store. Audi®, Quattro®, Avant®, A4®, S4®, A6®, RS4®, RS6®, Allroad®, TT®, and Tiptronic® are trademarks of Audi AG. Volkswagen®, VW®, Golf®, Jetta®, Passat® and Beetle® are trademarks of Volkswagen AG. While we try to keep everything current, JH Motorsports is not responsible for errors in pricing on this web site. All prices are in US Dollars.

Some of these modifications and or parts are intended for off-road use only and may violate Federal or your State emissions standards. Also, end user assumes all risk with product performance and installation. JH Motorsports is not responsible for any bodily or mechanical harm, etc. as a result of use or misuse of any products.