I agree with Hookalatch (remove downwards/below using a floor jack), although I foolishly once somehow removed/installed an SM420 "by hands" from underneath. Here are some additions to Hookalatch's nice instructions.
- Disconnect the torque-tube cover, and slide it back as far as possible.
- Support-up the torque-tube with a jack, and disconnect and remove the u-joint.
- Remove the u-joint and slightly lower the torque tube to allow you to push/knock the rear u-joint yoke rearwards.
- Jack up the torque-tube and hold it up, out-of-your-way, using the a 2x4 under it, supported/braced side-to-side inside the two frame rails.
To assist in installing the SM420, cut off the heads of two transmission mounting/support bolts, (
guide pins referenced here, and,
shown here ), to allow safe/correct alignment of the transmission to the clutch-housing cover (bell housing).
