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Ball Joint For Longer Tie Rod. Porsche 356 50-57 › 356040008
- Porsche 356 1950-55
Restore the steering precision and integrity of your Porsche 356 with this ball joint, designed for the longer tie rod version. Suited for Porsche 356 models from 1950 to 1957, this ball joint accepts the conus FI10,7 / FI12,2 specification and features a housing thread of M14 × 1.5. Direct-fit for the tie rod end, it provides smooth pivot action, minimal play and dependable steering response. Ideal for restoration projects, returning classic steering geometry to proper specification, or replacing a worn joint.
Fits:
- Porsche 356 1950-55
What This Product Does:
- A ball joint provides a spherical pivot point that allows the tie rod to articulate in multiple directions (as the steering knuckle and linkage move) while maintaining a robust connection.
- In this context, the “longer tie rod” for the 356 uses this ball joint at the end of the tie rod so the linkage can articulate and steer correctly.
- As part of the steering linkage, this ball joint ensures smooth steering movement, correct tie rod/track rod geometry, maintains alignment, and helps transmit steering input to the wheels reliably.
- Because it’s a pivot in the steering linkage, it must minimise play, move freely in all required directions, and handle load (steering forces, road inputs) without excessive wear.
Symptoms Of Wear Or Failure:
- Excessive steering play or looseness, especially front centre or in the tie rod linkage — the ball joint’s socket may have developed excessive clearance.
- Clunking or knocking noises from the front when turning the wheel or when going over bumps — a worn ball joint may allow movement that causes noise. General symptoms of worn ball joints: “Clunking or rattling noise… loose or pulling steering… uneven tire wear”
- Uneven tyre wear, particularly on the front steer tyres — a worn tie-rod ball joint allows alignment to shift under load.
- Steering feel degraded — less precise, vague, perhaps the car doesn’t respond as crisply to steering input.
- On inspection: the joint may show torn boot or weathered/aged rubber, corrosion, play when you physically move the tie rod end and check for movement in the ball joint.
- Because this is a component of the 356’s older steering linkage, age-related wear, corrosion or fatigue are likely.
Why Replacement Matters:
- Safety & Steering Precision: The ball joint is a critical link in the steering chain of a 356. A failed joint can compromise steering control, alignment and vehicle stability.
- Alignments & Tyre Life: A worn ball joint allows the tie rod geometry to shift as the vehicle is driven, causing misalignment, tyre wear, and steering problems. Replacing it restores correct geometry tolerance and helps retain proper alignment.
- Restoration & Originality: For a classic Porsche 356, fitting a correct part (356 040 008) ensures the steering system is period-correct and reliable — an important factor for value and performance.
- Prevents further damage: If the ball joint is worn, other components (tie rod, track rod, pitman arm, steering knuckle) may be stressed or move unexpectedly, leading to further wear. Proactive replacement avoids cascading issues.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
356040008
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
This steering component connects the steering system to the front wheel assembly, helping transmit steering input accurately and maintain correct front wheel alignment. Fits left or right side where specified
Sold individually, 1 required per side, 2 required per vehicle if replacing both sides.
Fits:
Porsche 996 1998 - 2005 all models
Porsche 997.1 2005 - 2008 all models
Porsche 997.2 2009 - 2012 all models
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2006 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Diagram ref no 8
What This Part Does / Functions:
• Connects the steering rack / steering linkage to the front wheel hub assembly
• Transfers steering input to the front wheels
• Allows steering movement through the integrated ball joint
• Helps maintain correct toe alignment
• Supports precise steering response and handling
• Replaces a worn, loose, seized or damaged original track rod
• Helps correct play or looseness in the steering system
Why Replace This Part?
Track rods and tie rod ends are common wear items in the steering system. The ball joint is exposed to road shock, steering movement, water, dirt and general wear. Over time, the joint can develop play, the boot can split, or the threaded adjustment section can seize. A worn track rod can cause vague steering, knocking, uneven tyre wear or poor wheel alignment.
Common Symptoms of a Worn Track Rod
• Knocking or clunking from the front suspension / steering area
• Play in the steering wheel
• Loose or vague steering feel
• Uneven front tyre wear
• Vehicle pulling to one side
• Steering vibration
• Split or damaged ball joint dust boot
• Failed MOT / roadworthiness inspection due to steering joint play
• Toe alignment cannot be adjusted correctly.
When to Replace This Part
• If the ball joint has play or looseness
• If the dust boot is split or leaking grease
• If the track rod is bent, seized or damaged
• During front suspension or steering overhaul
• When replacing steering rack components
• If uneven tyre wear is caused by steering joint wear
• If the vehicle fails inspection due to track rod play
Where It Fits on the Car
This track rod fits in the front steering system, connecting the steering rack / linkage to the front wheel hub carrier area.
It fits left or right side, so the same part can be used on either side where specified.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634713105
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Price is for each.
Fits:
Porsche 986 Boxster 1997-05
Porsche 996 1998-05
Porsche 996 Turbo / GT2 / GT3
The steering rack controls the front wheels by means of two track rods, terminated by replaceable joints - the "Track Rod Ends", attached to the swivel hubs. These will eventually wear, leading to problems with steering and handling, as well as being a failure point on the UK MOT and presumably on the statutory inspections in other countries.
Click 'Zoom in' for large parts diagram.
Diagram Ref No 6.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634732203
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
SET OF 2
replacement for 99634713104, 99634713103, 99134713100,
Fits:
Porsche 996 C2, C4, C4S, Turbo, GT2, GT3
Porsche 997 C2, C2S, C4, C4S, Turbo, GT2, GT3
Porsche 986 Boxster / Boxster S
Porsche 987 Boxster / Boxster S
Porsche 987 Cayman / Cayman S
The RSS Adjustable Toe Steer Kit is designed for 996 and 997 models that have been lowered.
This kit will help minimize suspension geometry changes in the front of the vehicle and allow additional toe adjustment at the toe steer arm. Features heavy duty, high tolerance monoball rod
ends for precise suspension articulation with improved handling and feedback. The rod ends are also height adjustable to help reduce/eliminate bump steer.
The links are sold as a pair for the front of the car.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
370
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
Replacement for 99634713104, 99634713103, 99134713100,
Fits:
Porsche 996
Porsche 997
Porsche 987 Boxster
Porsche 987 Cayman
Porsche 991
Porsche 981 Boxster
Porsche 981 Cayman
If you're serious about how your 996, 997, 986 Boxster, 987 Boxster, 987 Cayman, 991, 981 Boxster and 981 Cayman handles, you should upgrade the factory tie rods with an adjustable bump steer kit. There is one major drawback to the factory tie rods, bump steer. Bump steer results from a tie rod that is angled from the steering rack to the spindle. An angled tie rod end will have a larger horizontal travel distance than the rest of the suspension, compared to a level link. Rennline's adjustable bump steer kits solve this problem. Manufactured from 6061 aluminum and feature a turnbuckle design that allow each arm to be lengthened or shortened as needed to restore proper suspension geometry on a lowered Porsche. A number of spacers are also included and can be added or removed accordingly to get a level tie rod for your vehicles specific ride height. The FK Teflon-lined rod end bearings ensure precision handling and lock in your cars alignment settings, ensuring predictable cornering under all conditions.
Note: 2 kits required per car. Rubber Boots not included but available separately.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
S7510
The product you are viewing cross references to these numbers
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