80 series shudder / vibration on acceleration
- Thread starter Rumi
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- Thread starter
- #3
Just replaced all power steering lines and pump redid a birfield joint
I would look at the driveshafts and UJ's drive vehicle it to get them warm and then give them a good shake when there is no load on them.
Also the radius arm bushes could be shot allowing the axle to rotate a little changing the drive line angle under load.
Soft motor/trans mounts can bring on vibes under load, in particular the trans mount if you have had a fluid leak?
Was this something that just happened overnight or crept up slowly?
Regards
Dave
Also the radius arm bushes could be shot allowing the axle to rotate a little changing the drive line angle under load.
Soft motor/trans mounts can bring on vibes under load, in particular the trans mount if you have had a fluid leak?
Was this something that just happened overnight or crept up slowly?
Regards
Dave
Is the shuddering coming from the engine or the driveline/axles?
- Thread starter
- #8
Driveline/axles
- Thread starter
- #9
It sat since 2005 not shure of the history I also replaced the gas tank and fuel pump to initially get it going
These things are very very difficult to diagnose over the net. I would sit down and have a good think about it. When it was first noticed, had you just been off road, again list ALL repairs, drip feeding 'this was done' oh 'and then this' is not helpful.
Do the thinking first, had someone recently borrowed the car, kerbed it?
regards
Dave
Do the thinking first, had someone recently borrowed the car, kerbed it?
regards
Dave
We cross posted there, but the above is what I am talking about, I did not know you had only just got the vehicle, so go right through it and get a bar on on the drive train. If you are not familiar with cars (or the 80 in particular) I would get a knowledgeable mechanic to look at it. Frozen UJ's are common enough to warrant replacing and are not expensive, if you are doing it yourself check the yolks are correctly phased.
Regards
Dave
- Thread starter
- #12
K thanks!!
Rumi: How was that diagnosed?
You mentioned in your original post that you replaced a birfield joint (before the problem started)? Was the steering knuckle properly packed wtih grease
when you opened it back up and what was the condition of the spindle bushing on that side?
You mentioned in your original post that you replaced a birfield joint (before the problem started)? Was the steering knuckle properly packed wtih grease
when you opened it back up and what was the condition of the spindle bushing on that side?
Did you find out what caused the shudder? I am having same problem but my mechanic thinks it is transmission related.
I know this thread is 2years old but I have recently had this issue start with mine. Couple weeks back I hit a short 4x4 block of wood in the road and initially there wasn’t a problem. In the last week it has developed a vibration under acceleration and I can find any external reason why. Checked all fluids to make sure something wasn’t low and wearing out. Placed on jacked stand and checked all driveline u joints and front bearings. Nothing is grinding or has any slack. Did notice that when one of the front wheels is spun that it takes a few degrees of turning before the driveshaft starts to move. Can you explain how you found that it was your driveshaft?
He said front diff not the drive shaft.
How fast were you going? Im finding it hard to believe 4x4 block of wood could caused your vibration. But check for old worn out rubber bushings...radius arm. Tie rods, even engine mounts.
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Sorry…diff not driveshaft. This is not something that has been slowly getting worse. It just started and no repairs have been made since I bought it. Vibration only occurs under acceleration. Common sense would say something in the driveline. I had the front tires rebalanced yesterday and it cut out about 50% of the vibration but it is still there. I’ve worked on 18 wheelers for over a decade so I’m not totally dumb to what it could be. Just seeing if there was something I’m not thinking about.
Is ur 80 stock? Or modified.....lift, tires? Give us more detail
My 97 with 3" lift and 315s had a vibration sound during exceleration and u-turns, it turned out to be broken exhaust hanger.
My 97 with 3" lift and 315s had a vibration sound during exceleration and u-turns, it turned out to be broken exhaust hanger.
Stock except for 31” tires and 20” wheels.