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3J Driveline
3J Driveline for Porsche from Design911
A Quick Look at 3J Driveline
3J Driveline information on this page is based on details supplied by the manufacturer or distributor, plus any OE references provided with the parts.
Choosing the Right Fit for Your Porsche
Where 3J Driveline is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.
- Typical reasons to choose 3J Driveline parts include improving drivetrain response, addressing real-world wear issues such as play, vibration or tired joints, and opting for durability where the car sees spirited driving or higher torque.
- Common Porsche driveline symptoms include vibration under load, clunks on take-up, driveline slack, clicking or knocking from worn joints, and accelerated wear if mounts or alignment are off, often worsening as grease dries or boots split.
- Before replacing parts, it is often worth checking related items such as mounts or linkages, as these can mimic driveline faults and contribute to vibration or noise.
- Some performance-focused components can increase drivetrain feel or noise, so consider this when selecting upgrades for road versus competition use.
- Careful diagnosis is important because driveline vibration or noise can have multiple causes across the gearbox, differential, joints, and supporting components.
- Using the correct oil specification and maintaining fluid levels can help reduce wear, but it will not reverse damage where bearings or gears are already worn.
Browse by Category
If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.
Gearbox / Transmission — 3J Driveline is known for drivetrain components such as gearboxes and gear kits suitable for Porsche applications, supporting both replacement and upgrade work on road and competition cars. Typical reasons to change gearbox or transmission parts include shifting issues, noise, leaks, or refreshing a high-mileage drivetrain, as well as upgrades for stronger clutches or different ratios. Common symptoms include whining in a specific gear, crunching on shifts, difficulty selecting gears, or leaks at seals or casing joins. On automatics, slipping, harsh shifts, or delayed engagement can indicate fluid or valve body problems.
- Before assuming a gearbox fault, consider checks such as clutch condition, mounts, linkage adjustment, and correct oil type and level, as these can mimic gearbox issues.
- Where practical, changing to fresh, correct-specification transmission oil is often a sensible early step, while avoiding extended driving with noisy or slipping units to reduce the risk of further damage.
Rear Differential — 3J Driveline develops limited slip differentials and related differential components for Porsche, aimed at controlled power delivery and consistent traction in performance and motorsport use. Rear differentials are typically replaced or rebuilt to address noise, leaks, or to cope with higher torque in performance builds, as well as to remove excessive play that causes driveline clunks or to refresh aged bearings and seals. Common symptoms include whine on cruise or overrun, clunks when taking up drive, leaks from side seals or the input flange, and a noticeable “thud” as backlash increases. On limited-slip units, worn plates can reduce traction and cause chattering.
- In addition to the differential itself, it is good practice to inspect diff mounts, propshaft and CV joints, and gearbox mounts, as wear in these areas can contribute to noise and driveline harshness.
- Fresh, correct-specification differential oil can sometimes reduce noise where lubrication was poor, but it will not repair underlying bearing or gear damage, so plan for rebuild or replacement where wear is advanced.
Explore 3J Driveline at Design911
View the current 3J Driveline range for Porsche at Design911, then filter by model and category to narrow down to the right parts.
Enhance your Porsche 996 Turbo’s handling and performance with the 3J Driveline Plate-Type Limited Slip Differential (LSD), specifically designed for the Porsche 996 Turbo with Fine Spline 43T bolt-in shafts.
This specific configuration is aimed at rally use, featuring a 40/60 ramp setup with 70–75 lb/ft preload. Please ensure this configuration matches your intended use before ordering, as ramp angles and preload settings significantly influence the vehicle’s driving dynamics. Alternative configurations for different driving styles and applications are available here.
Fits (Manual Transmission Only):
Porsche 996 Turbo 3.6L 2001-05
Why Choose 3J Driveline’s NXG Performance LSD?
Proudly Engineered in the UK: Designed, manufactured, and assembled in the UK, ensuring precision and quality.
Strong & Progressive Design: Our NXG Plate-Type LSD features a robust bevel and planet gear pack with a large, strong tooth profile. This results in a smooth mesh and nearly eliminates the rattling and excessive backlash that often plagues other plate-type LSDs.
Maximum Contact Area: The plate pack operates with a minimum of 8 active surfaces, even at lighter pre-load settings, to provide maximum surface-to-surface contact for optimum performance.
Each differential is carefully assembled by our in-house experts, and we offer full customization options to suit your specific requirements.
Fitment & Installation...
While our LSD is designed as a direct replacement for the original part, we recommend checking for correct fitment before purchasing. Due to variations in original manufacturing tolerances, some modifications to the original casing or housing may be necessary during installation.
Upgrade your Porsche 996 Turbo with a 3J Driveline LSD and experience the ultimate in performance and precision!
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3J996-4060-7075
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
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12 Month Warranty
Worldwide Delivery
Express Delivery
Free delivery
Applications: Porsche 924 Turbo
Type: Porsche 924
Ramps Angles: 40/40 70/70 40/60 20/80
50/50 45/50 80/20 50/45
15/60 60/40 60/15
Pre-load (lbs/ft): 0-150
Side Gear: Fine Spline 43T
The latest NXG LSD is designed and manufactured to be the strongest, most progressive and versatile LSD unit in the marketplace today.
The 3J plate pack always run with 8 active surfaces, even in our lighter settings, giving maximum surfaces and surface area contact during use. Our new pre-load spacer helps generate the pre-load. Rather than just have the 2 or 3 settings of other units, we can 'fine tune' to particular pre-load settings complemented with our choice of ramps, to get the perfect LSD set up for you. The Bevel and planet gear pack has been designed to be the smoothest mesh, biggest and strongest tooth profile that we have ever been involved with. Eliminating the rattle, and excessive back lash of other units. Also With the added benefit of dual ramps. Dual Ramps available are 30/90, 40/90, 30/60, 45/45, 50/90, plus more by request.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3J924
The product you are viewing cross references to these numbers
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
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12 Month Warranty
Worldwide Delivery
Free delivery
Applications: Porsche 915
Type: Porsche 915
Ramps Angles: 40/40 70/70 40/60 20/80
50/50 45/50 80/20 50/45
15/60 60/40 60/15
Pre-load (lbs/ft): 0-150
Side Gear: Coarse Spline 18T & Fine Spline 43T
The latest NXG LSD is designed and manufactured to be the strongest, most progressive and versatile LSD unit in the marketplace today.
The 3J plate pack always run with 8 active surfaces, even in our lighter settings, giving maximum surfaces and surface area contact during use. Our new pre-load spacer helps generate the pre-load. Rather than just have the 2 or 3 settings of other units, we can 'fine tune' to particular pre-load settings complemented with our choice of ramps, to get the perfect LSD set up for you. The Bevel and planet gear pack has been designed to be the smoothest mesh, biggest and strongest tooth profile that we have ever been involved with. Eliminating the rattle, and excessive back lash of other units. Also With the added benefit of dual ramps. Dual Ramps available are 30/90, 40/90, 30/60, 45/45, 50/90, plus more by request.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3J915
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Free delivery
Applications: Porsche 914/Early 915
Ramps Angles: 40/40 70/70 40/60 20/80
50/50 45/50 80/20 50/45
15/60 60/40 60/15
Pre-load (lbs/ft): 0-150
Side Gear: Coarse Spline 18T, Fine Spline 43T
The latest NXG LSD is designed and manufactured to be the strongest, most progressive and versatile LSD unit in the marketplace today.
The 3J plate pack always run with 8 active surfaces, even in our lighter settings, giving maximum surfaces and surface area contact during use. Our new pre-load spacer helps generate the pre-load. Rather than just have the 2 or 3 settings of other units, we can 'fine tune' to particular pre-load settings complemented with our choice of ramps, to get the perfect LSD set up for you. The Bevel and planet gear pack has been designed to be the smoothest mesh, biggest and strongest tooth profile that we have ever been involved with. Eliminating the rattle, and excessive back lash of other units. Also With the added benefit of dual ramps. Dual Ramps available are 30/90, 40/90, 30/60, 45/45, 50/90, plus more by request.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3J914
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
Applications: Porsche 901
Type: Porsche 901
Ramps Angles: 45/45 40/90 30/90 50/90
30/60 35/35 20/75 30/30
35/45 40/60 20/80
Pre-load (lbs/ft): 0-150
The latest NXG LSD is designed and manufactured to be the strongest, most progressive and versatile LSD unit in the marketplace today.
The 3J plate pack always run with 8 active surfaces, even in our lighter settings, giving maximum surfaces and surface area contact during use. Our new pre-load spacer helps generate the pre-load. Rather than just have the 2 or 3 settings of other units, we can 'fine tune' to particular pre-load settings complemented with our choice of ramps, to get the perfect LSD set up for you. The Bevel and planet gear pack has been designed to be the smoothest mesh, biggest and strongest tooth profile that we have ever been involved with. Eliminating the rattle, and excessive back lash of other units. Also With the added benefit of dual ramps. Dual Ramps available are 30/90, 40/90, 30/60, 45/45, 50/90, plus more by request.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3J901
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
Enhance your Porsche 996 Turbo’s handling and performance with the 3J Driveline Plate-Type Limited Slip Differential (LSD), specifically designed for the Porsche 996 Turbo with Fine Spline 43T bolt-in shafts. Perfect for both daily driving and track use, this LSD delivers exceptional power transfer, improved handling, and reduced wear.
Customisable LSD Settings for Your Needs...
Select your LSD’s primary use from the drop-down menu, and we will fine-tune the unit to your exact specifications:
Fast Road: 55/90 Ramps, 25-35 Lbs/Ft (34-47 NM) Pre-load
Occasional Track Day: 45/90 Ramps, 25-35 Lbs/Ft (34-47 NM) Pre-load
Regular Track Day: 45/90 Ramps, 35-40 Lbs/Ft (47-54 NM) Pre-load
Long Circuit Race: 45/90 or 30/90 Ramps, 65-75 Lbs/Ft (88-102 NM) Pre-load
Short Oval Race: 45/90 Ramps, 50-55 Lbs/Ft (68-75 NM) Pre-load
Sprint/Hillclimb: 45/90 Ramps, 60-65 Lbs/Ft (81-88 NM) Pre-load
Rally: 35/90 Ramps, 65-80 Lbs/Ft (88-109 NM) Pre-load
Drift: 45/45 Ramps, 40-50 Lbs/Ft (64-68 NM) Pre-load
Other: For specific preload settings, please select this option, and provide your custom requirements in the comments box provided during the checkout process.
Upgrade to NXG Ultimate for Peak Performance...
For those seeking the highest level of performance, opt for our NXG Ultimate Upgrade by selecting "Yes, please" in the dropdown box below. This upgrade includes our Sintered Plate Pack, which reduces noise significantly and enhances both performance and service life.
Why Choose 3J Driveline’s NXG Performance LSD?
Proudly Engineered in the UK: Designed, manufactured, and assembled in the UK, ensuring precision and quality.
Strong & Progressive Design: Our NXG Plate-Type LSD features a robust bevel and planet gear pack with a large, strong tooth profile. This results in a smooth mesh and nearly eliminates the rattling and excessive backlash that often plagues other plate-type LSDs.
Maximum Contact Area: The plate pack operates with a minimum of 8 active surfaces, even at lighter pre-load settings, to provide maximum surface-to-surface contact for optimum performance.
Each differential is carefully assembled by our in-house experts, and we offer full customization options to suit your specific requirements.
Fitment & Installation...
While our LSD is designed as a direct replacement for the original part, we recommend checking for correct fitment before purchasing. Due to variations in original manufacturing tolerances, some modifications to the original casing or housing may be necessary during installation.
Upgrade your Porsche 996 Turbo with a 3J Driveline LSD and experience the ultimate in performance and precision!
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
3J996
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed