June 22, 2023
Warning:
Not compatible with ’64–’66 TH400 main shafts with major diameter of spline about .980". To use the Sonnax hubs in these early units, a ’67-later main shaft with major diameter of spline about .970" must be used.
4L80-E, 4L85-E, TH400, TH425
Heavy Duty Forward Clutch Hub
Part No. 34322-01
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Sonnax heavy duty forward clutch hub 34322-01 is an ideal upgrade over OE hubs in GM TH400, TH425, 4L80-E and 4L85-E applications. It is made from 1045 steel forging and features a thicker cross-section for increased strength.
- Made from forged 1045 steel
- Thicker cross-section for increased strength
- Added durability for daily drivers, work trucks and mild performance applications
Related Sonnax Parts
Required
Recommended
4L80-E, 4L85-E, TH400
Forward Clutch Hub Washer (Rear) 34301-094
- Material: Steel
- Thickness: 0.094"
- Outer Dia.: 1.780"
- Inner Dia.: 1.405"
-
Helps cure:
- Excess front endplay
- Forward clutch & sealing ring failure
- Reduced bearing, thrust washer & sealing ring life
Required
Recommended
4L80-E, 4L85-E, TH400
Forward Clutch Hub Washer (Rear) 34301-078
- Material: Steel
- Thickness: 0.078"
- Outer Dia.: 1.780"
- Inner Dia.: 1.405"
-
Helps cure:
- Excess front endplay
- Forward clutch & sealing ring failure
- Reduced bearing, thrust washer & sealing ring life
