Lurching Issue

[cedryck]

Nut loose on the clutch pedal?

Just kidding!

Wonder if the clutch operation is fine but you have something causing the engine to hesitate when it should accelerate smoothly. Like retarded timing from points that have closed down, ignition advance frozen, carb accelerator pump not working, for example.

True ,
This problem could be outside of the clutch and hydrolic system, sounds like I would, check points, timing. Is there enough fuel to carb? It is classic for these issues to happen after truck is warm and running for a while, are there some meter test to do on a coil? good luck.

[stomper]

Your castellated nut at the back of the main shaft of the transmission is likely loose. You will need to remove your overdrive to access it, and use your workshop manual to get the proper procedure.

[Richard]

Lurching might also be caused by weak or broken damper springs on the clutch disc. A harmonic torsional oscillation can be induced in the driveline if the spring rates aren’t correct.