78 Series Troopy with clunking noise
Submitted: Sunday, Jan 26, 2014 at 16:26
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Mark O4
Hi All,
After a piece of advice as to what I have broken in the Troopy. Went to the greens tip yesterday and to get the last branches out of the trailer, I took off quickly a'la what you see people doing at boat ramps to remove a boat off a trailer.
There was a clunking/grinding noise which sounds as if it is coming from the transfer case/ gearbox area. You can drive for a 100 meters or so slowly with no noise and then it starts again. The RAC don't know if it is the transfer case or diff and when it was towed to the mechanic's place (he is on holiday until Tuesday) I found that driving it up a small incline, the grinding was there again as if cog teeth were mismatched or slipping against each other.
I know that I will find out on Tuesday what it is but not knowing is bugging me and I can't work out why it will drive for a short distance without the noise.
It is a RV Troopy with factory turbo and tows a trailer (1.5T) three or four days a week.
Any ideas on what it could be?
Thanks in anticipation.
Cheers
Mark
Reply By: Ross M - Sunday, Jan 26, 2014 at 17:52
Sunday, Jan 26, 2014 at 17:52
If it is happening periodically then it may be, the sudden jet like take off to leave the trailer behind, has moved the engine and gearbox on its mounts slightly, particularly if one is loose or a bit worn out.
That may be pushing the 4wd lever against the boot folds in the stick opening in the tunnel and it is sometime trying to engage 4wd, hence the grinding, clunking sound.
May be just on the verge of touching but not always.
Any physical mechanical problem would usually be repetitive and short spaced in time, not a 100 metre distance.
AnswerID:
525169
Reply By: JohnnyC - Sunday, Jan 26, 2014 at 17:56
Sunday, Jan 26, 2014 at 17:56
Hi Mark,
Have a look at the universals on the rear driveshaft, I bet one of them have collapsed bearings.
They need plenty of grease, especially if you go in water, or they will dry up and the needle bearings crack up, if it happened when you dropped the clutch even more reason to suspect a universal.
If that's it they are not hard to change, you can get a new kit at any bearing place and only cost a few dollars.
AnswerID:
525170