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- 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 914 (1970-1976)
A cylindrical roller bearing used inside the gearbox to support rotating shafts (often the mainshaft or pinion shaft, depending on application) while allowing them to handle significant radial loads without excessive friction or wear.
Fits:
Porsche 911 1965 - 1973 MAN
Porsche 911 1965 - 1983 SPM
Porsche 914 1970 - 1976
Porsche 914-6: SPM 1970 - 1976
Diagram ref no 27
This cylindrical roller bearing supports the rotating gearbox shaft under high radial load, ensuring it stays properly aligned for smooth and quiet gear operation. It reduces internal friction and wear by providing a precise rolling surface, and it restores correct transmission performance when the original bearing has become worn, noisy, or damaged.
A worn gearbox bearing can cause shaft misalignment, leading to gear noise, rough shifting, and accelerated wear of gears and synchronizers. As the bearing deteriorates, it may generate metal debris, increase friction, and place additional stress on internal components. Replacing it with a fresh bearing restores stability inside the transmission, reduces noise, and helps prevent costly damage or failure.
Replace this bearing if:
• You hear whining, rumbling, or growling noises from the gearbox
• There is noticeable shaft play or misalignment during rebuild
• Gear changes feel rough or noisy due to misaligned shafts
• Gearbox oil shows metal particles or bearing debris
• Rebuilding or refreshing a 901 / 915 transmission
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911001201
The product you are viewing cross references to these numbers
- 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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Restore smooth, accurately supported gearbox operation with this OE Match Gearbox Cylindrical Roller Bearing, designed for compatible Porsche transmission applications.
Fits:
- 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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
A cylindrical roller bearing is a precision internal gearbox component designed to support rotating transmission shafts while allowing them to operate with minimal friction. Unlike a conventional ball bearing, it uses cylindrical rollers to provide a relatively large contact area between the rolling elements and bearing races, making this bearing type particularly well suited to carrying significant radial loads.
Inside a gearbox, accurate shaft support is critical. Gears must remain correctly positioned relative to one another so their teeth mesh as intended. Excessive bearing wear can allow unwanted shaft movement, potentially resulting in noise, vibration, poor gear engagement and accelerated wear of other transmission components.
This OE Match Gearbox Cylindrical Roller Bearing provides a high-quality replacement for a worn or damaged original bearing during gearbox repair, overhaul or restoration.
What This Product Does:
- Supports a rotating shaft within the gearbox.
- Carries radial loads generated during transmission operation.
- Allows the supported shaft to rotate with low friction.
- Helps maintain accurate shaft alignment.
- Helps maintain correct gear positioning and mesh.
- Reduces unwanted movement within the transmission.
- Supports smooth gearbox operation.
- Helps distribute loads through the bearing surfaces.
- Contributes to reliable transmission operation under varying loads.
- Helps prevent excessive shaft movement.
- Replaces a worn, noisy or damaged gearbox bearing.
- Provides an OE Match replacement for compatible Porsche transmissions.
Symptoms Of Wear Or Failure:
- Whining from the gearbox.
- Rumbling or growling noises.
- Grinding noises from the transmission.
- Noise that changes with road speed.
- Noise that changes depending on the selected gear.
- Increased gearbox vibration. Excessive transmission shaft play.
- Difficult or inconsistent gear selection. Gear lever vibration.
- Transmission noise under acceleration.
- Noise becoming more noticeable on overrun.
- Metallic particles found in the gearbox oil.
- Visible wear or pitting on the bearing surfaces.
- Damaged cylindrical rollers.
- Discolouration caused by excessive heat.
- Roughness when rotating the bearing by hand during overhaul.
- Excessive internal bearing clearance.
- Damage discovered during gearbox disassembly.
Why Replacement Matters:
- Transmission bearings maintain the precise relationship between shafts, gears and other rotating components.
- As a bearing wears, its internal clearances can increase. This can allow the supported shaft to move beyond its intended position. Even relatively small amounts of unwanted movement can affect how transmission gears engage and transfer load.
- A deteriorating bearing may initially produce only a faint whine or rumble. As wear progresses, vibration and shaft movement can increase and place additional loads on neighbouring gearbox components.
- Replacing a worn OE Match Cylindrical Roller Bearing during the early stages of deterioration can help prevent a relatively contained bearing repair from developing into a more extensive gearbox rebuild.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91530239906
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 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Fits:
Porsche 911 1972-86
Porsche 911 (930) Turbo 1975-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99911002500
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Fits:
Porsche 356 1950-65
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90005300201
The product you are viewing cross references to these numbers