Rear Differential
Fits:
Porsche 911 - 1972 to 1986 with 915 Gearbox
Porsche 968 - 1992 to 1995
For cars with Porsche LSD fitted - Option Code M220 (Locking differential 40 %)
Upgrade the standard Porsche LSD to these Track Day / Race inspired components for improved, performance traction.
Kit Includes:
Friction Plate Upgrade Set
Multi Variation Ramp Set
RacingDiffs Performance LSD clutch plates fit OEM Porsche (ZF) LSD unit without any modifications:
The clutch discs are perforated for better cooling and great viscosity to resist the oil build-up in the holes between dog ear plates as it is well known that drilled brake discs improve cooling over solid discs. It is the same with the LSD clutch discs.
The highest quality thermally processed tool steel is used which differentiates our products from any others on the market.
During the final steps of production the clutch plates are coated with special Molybdenum-Ceramic compound which optimizes the best ratio of friction coefficient and durability. This drastically reduces material wear and warping under extreme conditions providing our clutch plates the best possible longevity.
We mastered knowledge in the field of friction materials and coatings, which is the cornerstone of the quality of our products.
All of our clutch plates are thoroughly tested and are currently being used in various racing cars throughout Europe and USA including track, hill climb and rally.
Please Note:
Friction plate upgrade kit should only be fitted by someone with the relevant knowledge and experience.
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Note
Longer ring gear bolts may be required
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914/6 1970–1972 Sportomatic gearbox only
Porsche 911 F 1965–1973
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905900800
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914/6 1970–1972 Sportomatic gearbox only
Porsche 911 F 1965–1973
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99905900800
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 1965-83
Porsche 930 Turbo 3.0L 1975-77
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91533227604
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 1965-83
Porsche 930 Turbo 3.0L 1975-77
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91533227604
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 924 1976-85
Click 'Zoom in' for large parts diagram.
Diagram ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133228501
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 1965-89
Porsche 914 1970-76
Porsche 924 1976-85
Click 'Zoom in' for large parts diagram.
Diagram ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133228501
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 - 1972 to 1986 with 915 Gearbox
Porsche 968 - 1992 to 1995
For cars with Porsche LSD fitted - Option Code M220 (Locking differential 40 %)
Upgrade the standard Porsche LSD to these Track Day / Race inspired components for improved, performance traction.
RacingDiffs Performance LSD clutch plates fit OEM Porsche (ZF) LSD unit without any modifications:
The clutch discs are perforated for better cooling and great viscosity to resist the oil build-up in the holes between dog ear plates as it is well known that drilled brake discs improve cooling over solid discs. It is the same with the LSD clutch discs.
The highest quality thermally processed tool steel is used which differentiates our products from any others on the market.
During the final steps of production the clutch plates are coated with special Molybdenum-Ceramic compound which optimizes the best ratio of friction coefficient and durability. This drastically reduces material wear and warping under extreme conditions providing our clutch plates the best possible longevity.
We mastered knowledge in the field of friction materials and coatings, which is the cornerstone of the quality of our products.
All of our clutch plates are thoroughly tested and are currently being used in various racing cars throughout Europe and USA including track, hill climb and rally.
Please Note:
Friction plate upgrade kit should only be fitted by someone with the relevant knowledge and experience.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92833255100
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 901 GEARBOX
For Technical Specifications Click Here
Quaife ATB Helical LSD differential for Porsche 911 1969-74 is suitable for Porsche 911 models in model year 1969-74 only. A direct replacement for the standard Porsche differential, the Quaife ATB Helical LSD differential transforms your cars performance.
Unlike a conventional plate-style limited slip differential, the Porsche 911 1969-74 Quaife ATB Helical LSD differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operation.
The Porsche 911 1969-74 Quaife ATB Helical LSD differential never locks harshly with a set pre-load of wheel slip across the driven axle, like a conventional LSD. Rather, the Porsche 911 1969-74 Quaife ATB Helical LSD differential automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree, and never locks.
The Porsche 911 1969-74 Quaife ATB Helical LSD differential has many benefits over a standard open differential, including maximising traction and minimizing wheelspin, eliminating torque steer and snatching in front wheel drive cars compared to conventional LSD units, and a maintenance-free design which retains the standard oil lubrication.
The Porsche 911 1969-74 Quaife ATB Helical LSD differential is proven in circuit and drag racing, rallying and road use, and is produced from Corus steel billets, and is CAD designed and CNC machined, then inspected to ISO 9001 standards.
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Shop Securely
12 Month Warranty
Worldwide Delivery
FITS:
Gearbox type 901:
Porsche 911 1969-74
Porsche 914 1969-74
Innovative:
Patented Wavetrac® design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.
Superior Materials:
9310 steel gears run in case-hardened billet or forged steel bodies. ARP® fasteners used throughout.
Maintenance Free:
As supplied new, the Wavetrac® differential will perform a lifetime of service without maintenance or rebuilds.
Customizable:
If desired, you can alter the diff's behavior to suit your needs using optional components.
Limited LIFETIME Warranty:
All Wavetrac® differentials include a transferable, Limited Lifetime Warranty.
For More information Click Here
Please note: This is a special order part and usually takes between 2-6 weeks to come into stock.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
40309130WK
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 Carrera - 1972 to 1989
Porsche 944 Early models - 1982 to 1991
Porsche 968 - 1991 to 1995
Only for cars with Option Code - M220 (Locking differential 40 %)
Optimise Your Porsche LSD with RacingDiffs Multi-variant Ramp Set
The RacingDiffs LSD Multi-variant Ramp set provides three different ramp angle positions to enhance the performance of your Porsche's limited slip differential. This ultimate upgrade fits various Porsche models, ensuring superior traction and handling for all types of racing.
Ramp Angle Positions:
- 30°/30°
- 30°/60°
- 50°/65°
What is LDS ramp angle?
Ramp angles primarily determine the behaviour of the LSD under acceleration and braking. They are often referred to as 1 way, 1.5 way, and 2 way, these terms refer to when the differential locks.
Key Features:
Superior Material and Construction:
Made from forged material for maximum strength and durability.
High-precision CNC finish ensures a perfect Plug & Play installation.
Chemically heat-treated for high durability and wear resistance.
Enhanced Performance:
Allows adjustment of your differential from 25% up to 100% lock in 2 ways or 1.5 ways.
By altering the ramp angle setup, you control how fast and effectively the differential locks.
Versatile and Customisable:
No need for multiple differentials; this set can be adjusted according to your track requirements, guaranteeing success in various racing disciplines.
Why Choose RacingDiffs Multi-variant Ramp Set?
Adjustable Lock: Customize your differential's locking capabilities for different racing conditions.
Durability: Constructed from high-quality materials for exceptional longevity.
Easy Installation: Direct replacement with no modifications required.
Optimal Performance: Provides superior handling and traction, crucial for racing.
Recommended Companion:
For the ultimate LSD performance upgrade, combine this ramp set with our Performance Clutch Set.
Please Note:
Friction plate upgrade kit should only be fitted by someone with the relevant knowledge and experience.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92833251100
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Shop Securely
12 Month Warranty
Worldwide Delivery
2.5 mm.
Fits:
Porsche 911 F (1965 - 1970)
Porsche 914/6 (1970 - 1972) Only for 914/6 with Sportomatic transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133226501
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
2.6 mm.
Fits:
Porsche 911 F (1965 - 1970)
Porsche 914/6 (1970 - 1972) Only for 914/6 with Sportomatic transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133226502
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
2.7 mm.
Fits:
Porsche 911 F (1965 - 1970)
Porsche 914/6 (1970 - 1972) Only for 914/6 with Sportomatic transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133226503
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
2.8 mm.
Fits:
Porsche 911 F (1965 - 1970)
Porsche 914/6 (1970 - 1972) Only for 914/6 with Sportomatic transmission
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90133226504
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Porsche Rear Differentials | Precision Power Distribution for Maximum Traction and Performance
The rear differential is one of the most critical components in your Porsche’s drivetrain. It transfers engine power from the transmission to the rear wheels while allowing them to rotate at different speeds during cornering. This ensures balanced handling, traction, and stability — essential for Porsche’s trademark driving dynamics.
At Design911, we supply high-quality rear differentials and differential components engineered to meet or exceed original performance standards. Built from precision-machined gears, hardened steel housings, and performance-grade bearings, each unit ensures smooth torque distribution and dependable strength under demanding conditions.
Whether you’re maintaining a daily driver or upgrading for track use, our Porsche rear differential parts deliver improved traction, cornering precision, and long-term reliability.
What Does the Rear Differential Do?
The rear differential balances rotational speed between the rear wheels while transmitting power from the gearbox to the axles.
Core Functions:
- Distributes torque evenly between rear wheels.
- Allows independent wheel rotation during turns.
- Prevents wheel slip and loss of traction.
- Reduces drivetrain stress and enhances stability.
- Supports optimal cornering control and handling balance.
Without a properly functioning differential, your Porsche may experience wheel spin, vibrations, or loss of power transfer — reducing both performance and safety.
Why Do Rear Differentials Fail or Wear Out?
Over time, continuous stress, torque, and heat exposure can cause differential components to wear, leading to poor lubrication and gear damage.
Common Causes of Failure Include:
- Low or contaminated differential oil causing friction and overheating.
- Bearing wear leading to excessive noise or vibration.
- Gear tooth pitting or chipping from torque overload.
- Seal failure causing oil leaks.
- Corrosion or fatigue from moisture intrusion.
Signs of a failing differential include whining noises, clunking on acceleration, fluid leaks, or uneven tyre wear.
Why Replace or Upgrade Your Porsche Rear Differential?
Replacing a worn or damaged differential restores power delivery, traction, and drivetrain balance. Upgrading to a performance-spec or limited-slip differential (LSD) enhances handling and control — ideal for spirited road or track driving.
Key Benefits:
- Restores smooth, balanced power distribution.
- Eliminates noise, vibration, and gear chatter.
- Improves traction and acceleration out of corners.
- Extends drivetrain longevity through precise engineering.
- Suitable for Porsche 911, Cayman, Boxster, Panamera, and classic models.
- Available in performance or standard specifications.
Replacing the differential during gearbox or axle servicing ensures long-term reliability and optimum drivetrain efficiency.
Highlights
- Premium Porsche rear differentials and components.
- Precision-engineered for torque balance and durability.
- High-strength materials for road, race, or restoration builds.
- Reduces noise, vibration, and harshness (NVH).
- Ideal for upgrades, rebuilds, or performance applications.
- Compatible with manual, Tiptronic, and PDK systems.
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Clutch Kits
-
Clutch Kits - High Performance
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Clutch Friction Plate
-
Clutch Pressure Plate
-
Clutch Release Bearings
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Clutch Cables & Parts
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Clutch Guide Tube
-
Clutch Ring Gear
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Clutch Forks & Levers
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Clutch Bolts
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Gearbox Parts
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Driveshafts & Parts
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Gasket Sets / Gaskets / Seals / Lock Nuts
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Gearbox Mounts
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Gearshift Control Parts
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Flywheel / Torque
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CV Joints Kits
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CV Boots and Kits
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Cardan Shaft / Prop Shaft
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Transmission Parts
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Gearbox / Differential Oil
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Gearbox Sump / Oil Pan
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Used Transmissions / Gearboxes
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Sportomatic
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Transmission Cooling
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Motor Sport Parts
