GM-N-20: Enhanced Replacement for GM-N-18 Impeller Side Bearing
The 6L80-E impeller side enclosed bearing, GM-N-20 can be used as an enhanced replacement for the impeller side bearing in the GM 300mm. It may also be the better impeller side bearing option in the GM Late 4L80-E (single stator) converter.
Several customers told us that they were having problems with the impeller side bearings in the GM 300mm unit (GM-N-18). After researching this issue and comparing the GM-N-18 to the similarly sized GM-N-20 bearing, we believe the GM-N-20 is the better product for the impeller side bearing. As the races associated with the GM-N-20 are thicker, material must be machined off the back of the stator when used to replace the GM-N-18 bearing. The inside diameters of both bearings are the same. We recommend continuing to use the GM-N-18 to replace turbine side bearings in the GM 300mm due to their low failure rate and since the turbine side stator cap is already fairly thin.
Related Units
300mm (4L60-E) Converter
4L80-E (Early Single Stator) Converter
4L80-E (Late Single Stator) Converter
Related Parts
Required
Recommended
280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator), 6L80, 6L90 (300mm), 6L80, 6L90 (300mm)
Thrust Bearing GM-N-20
- Bearing Style: Enclosed
- Material: Hardened Steel
- Inner Dia.: 2.598"
- Thickness: 0.179"
- Outer Dia.: 3.661"
Required
Recommended
280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator)
Thrust Bearing GM-N-18
- Bearing Style: Enclosed
- Material: Hardened Steel
- Inner Dia.: 2.593"
- Thickness: 0.155"
- Outer Dia.: 3.661"
While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time.