300M 2-Piece Output Shafts
These new heavy duty output shafts feature a unique 2-piece design with an extended bearing
surface. They are gun-drilled to save weight with no governor or speedometer support. A “must have” for your T-400 when high horsepower meets heavy weight or rear gear is numerically
low. This strong, affordable option is easily installed and can be purchased outright or as an
upgrade option in your next ATI 400 transmission.
T400 300M Output Shafts *
STANDARD LENGTH (6”) - 300M MATERIAL
POWERGLIDE LENGTH (8.5”) - 300M MATERIAL
4X4 LENGTH (6.250") - 300M MATERIAL
4X4 LENGTH (5.250") - 300M MATERIAL
* Makes the 4L80E trans the same length as the T400
T400 4340 Forged Output Shafts
These Turbo 400, Forged 4340, 1 piece output shafts are brand-new replacements and come with extra-long splines and markings so they can be cut to Powerglide length all the way down to the shortest 4x4 length. The output shaft (Part #406027) will accept standard speedometer gears, has a bushing, but does not have provisions for an OEM governor.