Troopy very bad vibration 100kp/h

I assume you also checked the rims for debris/crap on the inside? If you've been through some muddy areas the mud could have built up on the inside of the rims?

One obvious area not mentioned.

Cheers

Rob K

Bent or out of balance tail shaft.

Cheers,
Peter
OKA196 Motorhome

Gday rb
I think you should take the tail shaft off and check to see if a uni has seised. They dont have to be loose to be no good.

Hi rb30e just a question on Uni inspection did you actually drop the unis out to check them .I had similar vibration in a Jackeroo years ago and while everything looked good until I removed them and one was very stiff in one plane replaced it and no more problems .You never know hope you sought it .Also might be worth a look that tyres are not out of round tread parted company with case in one spot that sought of thing mickb

Maybe wheel alignment disturbed.

rb30e - Check your tailshaft for missing balance weights, which are usually merely spot-welded or tack-welded into position.
If the weld cracks, the weight is thrown off, and the tailshaft goes out of balance.

Check for a loose diff pinion shaft nut - or a failing pinion shaft shaft front bearing - both of which will make either the yoke or the pinion shaft loose, and create an eccentric wobble in the tailshaft.

You check by grabbing the tailshaft directly in front of the diff and trying to shake it up and down.
If there's movement in the yoke or pinion shaft, then you need to investigate further.

You need to do the same with the transfer case output shaft. The nut on the output shaft yoke may be loose as well, or the rear transfer case bearing could be failing.

All the previous posts are worthy opinions, as well. A whack from a rock can easily bend the tailshaft tubing and cause vibration.

Get it fixed, FAST - as tailshaft vibration imposes dreadful stresses on the engine and transmission and accessories.

As a result of tailshaft vibration that was ignored, I have seen ...

1. Starter motors and alternators fall off, due to the vibration loosening the studs and nuts.
2. Housings, such as bell housing and transmission case housing, seriously cracked, due to the vibration.

Cheers, Ron.

G'day rb30e, possible things to check:
- Wheel Rims for dents, build up of mud or loss of balance weights
- Loose wheel nuts
-Prop Shafts for loss of balance weights or dents.
- Universal joints for stiffness etc.
- Shock Absorbers for broken mounts etc
regards Jim

I also have a 75 series Troopy and the same happened to me.Vibrationed over a certain speed.Turned out to be the unis. Glenn.

delete this second reply

Hi,

Thanks all for the replies and advice.

There were some scuff marks on the rear tailshaft so I jacked the car and put it in drive. The shaft is pretty rooted! Bout 10mm deflection, to make things worse my troopy has been converted to auto so this is a custom driveshaft I will now have to get remade.

Bummer!