WE HAVE TESTED THE VAN WITH WHEELS ON THE GROUND.NEITHER INNER OR OUTER DRIVE SHAFTS TURNED WHEN IN 1ST GEAR DO THEY ARE FINE NO BROKEN JOINTS ECT....
WE DID A TEST BY LIFTING THE CLUTCH IN FIRST GEAR WITH LOE REVS AND THE VAN STALLED WHICH INDICATES THE CLUTCH IS WORKING OK....DO YOU AGREE ON THAT STATEMENT?
I HAVE A FRIEND WHO HAS A LIITLE EXPERIANCE AND HE SENT ME THIS SUGGESTION.OBVIOUSLY I'M NOT GETTING INTO A DEBATE BETWEEN US ALL BUT DO YOU THINK HIS SUGGESTION IS WORTH TRYING:
Indeed a vexing set of symptoms. I assume it is 2 wheel drive? Petrol or Diesel (just interested).
1) Initially: Engine running, clutch slipping badly and smoking.
2) Now: F.wheels turning faster and faster as you go through the gears with them off the ground but you can stop them with your foot.
Q. Is the new clutch still smoking? If so was the old clutch contaminated, ie. Engine or transmission oil leaking on to it.
Q. Did you change the release bearing as well?
Q. Can you always stop it with your foot irrespective of what gear it is in?
Remote diagnosis is virtually impossible but on the face of it:
1) The Clutch is transmitting drive to the input shaft.
2) The quality of this transmission is unknown but appears to be very weak - What can cause this....
1) Incorrect adjustment (clutch is only just engaging perhaps due to sticky mechanism or incorrect adjustment)
2) Linings are badly contaminated.
It is possible the gears are NOT actually engaging but are being dragged by oil friction (quite common to jack up a drive wheel and it turns weakly with the engine running even out of gear... still I expect you know that).
What to do:
Difficult as you have some contradictory symptoms. But I would firstly eliminate the differential and work through the gears. This will only take a few minutes.
With BOTH front wheels off the ground, and the engine OFF, but IN GEAR try and turn one of the wheels by hand. If the diff is good and AND the gears are transmitting power to the flywheel the other front wheel will turn in the opposite direction. Now prevent it from turning either by chocking it or having and assistant hold it firmly and try to turn your wheel. It should be difficult but possible to turn the engine over manually this way. Note what happens and then try it with the other gears. Obviously the higher gears will be harder to turn the engine over manually.
It will be interesting to see what happens. If any of the gears can turn the engine over (with the spark plugs still in) then it suggests the clutch is good. If not then either the clutch is slipping terribly or the differential is broken (possibly the end of one of the driveshafts snapped off, but this does correlate with the original clutch smoking symptom). Off the top of my head I cannot think of another internal gearbox issue that would affect ALL gears short of a catastrophic gear shaft snapping.
Let me know how you get on.