Well, Bill and I have had some PM correspondence and he has agreed that it can be shared here.
@Shayne and
@pradolover90 might be interested as the symptoms now seem very similar to that other topic.
The recent correspondence is as follows (my highlights):
Bill - 23/12 -
Finally got it back together.
The original noise has gone it was the front arm bushes. There is a loud noise that seems like something slipping. There is a lot of free play between the output flange for rear and front on the transfer is that normal?
Bob - 24/12 -
Hi Bill,
Transfer boxes are never 'tight', even a new chain has some slack and front and rear shafts are connected via the centre differential planet carrier which also has backlash.
I think I included the list of parts I fitted, it has a new chain, planet carrier and bearings there isn't much else (if anything) I could have done to tighten it up. I would expect 30 to 40 degrees of slop between the output flanges.
Slipping you say . . The only time I have encountered this (after rebuilding the transfer box twice) was stripped splines in a front wheel hub. The Auto '90' would drive on the road but lose drive with a clattering when driven off-road. I have never encountered a slipping chain which is what people normally suspect. If you follow the forum you will see a member in the USA had his drive chain replaced but it made no difference to his 'shunting' problem.
I also think that a slipping chain would chew the sprockets - but I haven't seen that in any of the nine or so boxes I've overhauled. One had been 'off-roaded' so hard the diff planet carrier had shattered.
Is the loud sound you hear associated with loss of drive - all very intriguing ?
I'm afraid these cars are getting old and will never drive like new without a stupid amount of money being spent on them
Its always difficult to advise on a car I've not seen, I'm afraid its a case of hunting down each problem individually. You will certainly understand the car after this !
Regards and have a Very Happy Christmas one and all.
Bill - 26/12 -
No loss of drive it needs more investigation. I’ve had the driveshafts out several times as this has been suggested to me by everyone in the know. I have a video of the noise I could email you. Clutching at straws really it’s been apart on my lift so many times now. I’ve laid under it while someone drives over me and it’s coming from the middle of the drivetrain. But as soon as you remove front prop and lock the transfer the noise goes. So it’s not gearbox.
Bob - 26/12 -
This sounds exactly like the problems that
@pradolover90 is having in the USA. He has had the Hi-Vo chain replaced and his knock is now worse.
Would you mind if I put this recent exchange up on the main forum (I don't think there is anything sensitive here) and the collective can apply their minds to both. Hopefully between us we can come to a 'Eureka' moment
What oil have you got in the Transfer Box (should be EP90 GL5) ?
What sort of rotational play is there between the front & rear drive flanges
@pradolover90 put a video up showing the play in his and it was less than I would consider normal. I'm interested to hear if yours is similar or worse.
I'll give it more thought.
Cheers.
Bill - 26/12 -
Hi yes ep90 gl5. Before the knock was under heavy load now it’s under light load/continuously. No problem add add to main forum. Have you got an email I’ll send the video.
Bob - 26/12 -
The MOV Vid:
I have the file but its a
.mov and I can't attach it (invalid file type) - could someone advise on how to convert it - to what ?? MPEG ? I don't know.
The 'knock' is very evident and unlike anything I've heard before, I can't believe its coming from the Transfer Box as practically everything that wears in there is new. Very strange.
Bob.