Vibrator

[Albannach]

You get any weird noises in reverse?

Nope.

Is the rear axle out of line perhaps?

Nope, I put an adjustable Panhard rod on it when I did my LC springs.

[Albannach]

In May, when we get that dry week, I'll check all the mountings and bushes again.

I'm not sure I can be bothered stripping the front off the engine to check those balance shafts Rob mentioned. Can they be checked an easier way?

Rob; Did the vibrations smooth out as the engine speed increased?

[wishbone]

It's been a long time since I last drove it (Jan 3rd ) but I remember it was most noticable at tick over. One thing I've just noticed is that you said yours has got worse recently - there's no way the shafts could suddenly slip a tooth really so that would pretty much rule them out ?

[Sancho]

Torque converter? I have no idea how, but just thinking it could be vibrating when it locks out at 60 and again when 'whatever' disengages the drive at idle.

[gwh200]

I suggest (when your able to) starting it and crawling under it. Pay close attention to the engine/gearbox mounts. There's a chance they may have gone soft rather than busted. It should be obvious. As Adam says, look through the hole in the bell housing, but the torque converter being out of balance would have shaken you silly just before it fell off.
And to all the big girls that are going to read this and say

"lay under a vehicle with the engine running...hmmm, under current H&S laws I couldn't recomend...blah blah blah"

to you big girls I say, rack off and go wnak in your hankie a bit more.

[BUSHWHACKER]

I suggest (when your able to) starting it and crawling under it. Pay close attention to the engine/gearbox mounts. There's a chance they may have gone soft rather than busted. It should be obvious. As Adam says, look through the hole in the bell housing, but the torque converter being out of balance would have shaken you silly just before it fell off.
And to all the big girls that are going to read this and say

"lay under a vehicle with the engine running...hmmm, under current H&S laws I couldn't recomend...blah blah blah"

to you big girls I say, rack off and go wnak in your hankie a bit more.

I do it with every Lexurf looking for any leaks!





Er.... thats the laying under the truck with the engine running, not the hankie bit.

[KERRSURF]

I've had engine blocks go soft on a sports car before, I think my truck has a bit of a shoogle (Scottish for light shaking) on tick over, when I got it at first this wasn't present.

[TonyN]

Wishbone has a point, the balence shafts could be a culprit, but you'd feel it all the time reving the motor, you wouldn't have to be driving.

You can't check them without stripping the timing gear cover off (not the cam belt cover, the whole front)

It could have got worse if the bearing are shot and wearing, or the gear pulleys are loose.

They are 'like' two camshafts parallel to the crank, and are driven off the timing gears.

Broke Flexi plate also springs to mind, or as someone mentioned the converter internally broke maybe.

Engine mounts, could be to, but it normally hits something and makes a bang when you load the motor.

[JUDWAK]

Now that I have your attention...

My truck vibrates quite a bit most of the time, way more than my 2.4 did. Recently though, it's got worse. The whole thing vibrates when idling and it feels like it wants to rattle its self to pieces at about 60MPH.

Things it's not (or doesn't appear to be):

Wheel balancing, all 4 have been done twice by 2 different places, the wheels have also been swapped front to back and side to side with no change.

No difference in 4wd or 2wd.

Steering, it's all new and rock solid at the front.

Front brakes, all new and working perfectly.

Prop shaft, new UJs, prop alignment retained.

Diff, no whining.

Engine and gearbox mounts are visually OK

Idle sped is around 600rpm, so not overly low.

It's not a misfire either, it's a proper vibration.

Things it may be: rear wheel bearings are a bit noisy and I've not checked the back brakes for a while (brake pedal does not oscillate). But these don't explain the vibrations at idle.

Anyone got any other thoughts on what it may be? Or can you confirm rear bearings will cause vibrations like I have?

I fully understand I may have more than one fault with the truck, and I'm asking here because I can't get under the truck to check things at the moment.

my truck did the same i could not get the women out of it

[gwh200]

I do it with every Lexurf looking for any leaks!





Er.... thats the laying under the truck with the engine running, not the hankie bit.

S'ok boss...I know what you meant...don't think you have time either...

[Albannach]

The vibration when moving is mostly the front driveshafts. If I unlock them, vibration-no-more.

[TonyN]

ooh, then I'd check your ADD is disconnecting propery. (does the front drive shaft rotate, it should turn freely by hand when you are stopped. )

100% sure the prop yokes are lined up properly via the splined bit?

How did you get on the rear bearings? If you are running out of options I'd check them.

When you say your locking the hubs makes it happen, is this still it in 2wd, or just 4wd? This will help choose between diff or drive shaft issues.

[Albannach]

Not tried to turn the shafts yet, too cold and wet. But I'm pretty sure it's coming out of 4wd OK.

I'm 100% certain the prop is lined up correctly, I didn't split it when I did the UJs and I double checked the alignment (nipples) before I re-fitted. I did notice (and I think I mentioned) that when I was doing the UJs, they were a real PITA to strip. I may have damaged something when I was hitting them out? I also noticed that 2 of the new cups were 'loose' in the housing, maybe something wrong with the (Blueprint) UJs themselves?

Not done the rear wheel bearings yet.

If I lock the hubs, I get the vibration in 2wd. I'm thinking it's because of my front lift, the bearings will now be running on different bits of the housing?

[cazyp]

I've just started getting one of the similar vibrations to you.
Worse in D with foot on brake at standstill but can still feel it while driving.
Feels like the engine is shaking more and 'sounds' throaty or deeper in tone. Almost sounds like the noise is loudest behind the glove box area!

Also sometimes there is a 'lump' or knock type noise when starting - not every time but perhaps once in 5 times.

My guess is an engine mount gone soft. as they look intact though i'll admit the weather has put me off poking around too much!

Any advice most welcome!

Oh - also just noticed a squeek - but sounds like alt' belt slack so perhaps unrelated in this cold weather!