Uni Joint

Kym, I don't know if it is a problem or not but it doesn't sound right. Try looking under a brand new car to see if it has the same movement and maybe even under a Colorado.
Ian

Try asking for a written assurance that it is within recommended tolerances.

Kym c1

Do you mean the two uni yokes move in the rear of the gearbox extension housing the 5mm amount
OR
do the two uni yokes move the 5mm in relation to each other.

The first would indicate a worn bush in the extension housing where the front yoke slides in and out,
The second would mean the uni is stuffed and it would also have rotational slackness too.

It is not uncommon for dealers in general not to grease the tailshafts.
They didn't on mine,
I went and looked and found many other Dmax, and others too, not greased after the 10,000 service and a few not greased after the 20,000 service. If yours is one of those it may have worn as a result.

Check to see if there is any general "fling off" of grease from the 3 uni's and if there is none then it would seem yours hasn't been greased. The 20,000km ones didn't have any fling off.

I wouldn't be going to see Simpson until confirmed as ok. Independent advice may be needed. Dealers will say it'sok because they are all ok aren't they?

Ross M

Sorry I do know the vehicle at all. However:

If it is a one piece tail shaft with a uni at either end and the one at the gearbox end it moving up and down then there is clearly a problem and I would be getting a second opinion.

If it is a two piece driveshaft with a support about half way along then maybe a different matter. The gearbox end is connected to the gearbox and should not move. The centre support of a two piece driveshaft is normally rubber mounted where it is designed to move around to take out vibrations. If it is one of these centre UJs you are talking about (the closest one to the gearbox end) then I would say it is OK - it should be obvious if the rubber mount has stared to break down. If the movement is just in the UJ rather than the whole yoke, UJ, shaft assembly then I would be getting the UJ changed.

Garry

Without seeing the vehicle it is hard to give a definitive answer, but what I find um...unusual is a dealer wanting to NOT change a part. Most, are looking for something to replace because of extra dollars. Maybe they are just too busy or just maybe you have a very honest dealer. I have heard they do exist. Mind you we do hear of sightings of Tassy Tigers and such like (;-))

Cheers
Pop