Mitsubishi to Ford Engine Conversion Page 7

Here is the photo of the centre bearing mount. Since there was nothing to support it, a new beam had to be welded in to the chassis frame.

As a general rule for mounting a 2 piece shaft, the angle should follow the following rule and there are may articles about it on many other websites so I will not go into details.

From the diagram below:

Angle A

This is the angle between the transmission output shaft and the front half of the prop shaft. There should be no angle between the shaft either vertical or lateral. Consider as the extension of the transmission output shaft.

Angle B

This is the angle between the front half of the shaft and the rear half of the shaft. A lot of reference materials indicate that the angle should not exceed 3 degrees under normal operating condition. If it does, the drive train components such as universal joints and synchronisers and diff may wear down much sooner than intended.

Angle C

This is the angle between the rear half of the prop shat and the final gear input shaft. It should be at same angle as the Angle B in order to cancel out the change in rotational velocity as universal joints rotates at an angle.

There was one occasion when I had a very rusty rear axle on the same truck, the axle mount on the solid axle started warp after being weakened by corrosion...what happened was that the hole axle started to swing up (opposite of wheel rotation) started to shake violently at any speed above 50 mph.

Thanks to that, the gearbox was shot, diff was shot after relatively short space of time (lass than 2 months)...

This is showing the mounting points for the transmission mount re-constructed and transmission mounted.

In order to adjust the angles exactly, I constructed a jig so that the engine and centre bearing sit slightly lower than they should do and I kept adding shims until all angles were correct.

My final angles were 0, 2.5, 2.5. Under load the angle will reduce slightly with 10 mm shim under engine mounts, 2.5 mm shim under transmission mount.

After 2 days of shifting the engine and gear box back and forth, the engine and transmission were finally fitted but I realised there was another problem when I got my head out of underneath the truck...

There was not enough space at the fromt of the engine...So the viscous Fan had to go...

Then I thought that was the end of the problem...

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