So since I've bought my FZJ80 4 years ago, I've always had a slight vibration at 60-70mph. Sometimes its mild, sometimes its bad. A little digging has said the variation of intensity could just be harmonics but I'm happy to accept it as a symptom. Detailed symptoms is it shakes the whole truck, I think its in my seat (so leaning towards rear) but its hard to isolate.
I'd love to see if we can get a thread listing all the possible causes of vibration at high speed for me and future mudders to help check off. I'm going to list the causes I know and found (plus my specific resolutions).
Possible causes:
- Bent Wheel (I've gotten 2 sets of tires since owning and countless balancings and no one has ever mentioning a bent rim. Of course still possible, but seems unlikely)
- Out of balance tire or alignment (See above)
- Bent Axle (Going to be taking the two rear axles to a shop to check for runout)
- Bad Shock (Brand new Toyota shocks just put on, the vibration is much better but still there)
- Bad wheel bearings (Replaced some time ago, no change)
- Bad U-joint (@rifleshooter suggested)
- Bearing Preload Off (@Eicca suggested)
- Dry spindle bushings (@RAYJON suggested)
- Bad axle pinion bearings (@RAYJON suggested)
- ?
Could an out of balance drive shaft cause this (specifically at only high speed)? Or what ever causes are there that I can check before putting this all together.
Edit: I'll continue to add causes as they come in to keep the first post full of info for others.
I'd love to see if we can get a thread listing all the possible causes of vibration at high speed for me and future mudders to help check off. I'm going to list the causes I know and found (plus my specific resolutions).
Possible causes:
- Bent Wheel (I've gotten 2 sets of tires since owning and countless balancings and no one has ever mentioning a bent rim. Of course still possible, but seems unlikely)
- Out of balance tire or alignment (See above)
- Bent Axle (Going to be taking the two rear axles to a shop to check for runout)
- Bad Shock (Brand new Toyota shocks just put on, the vibration is much better but still there)
- Bad wheel bearings (Replaced some time ago, no change)
- Bad U-joint (@rifleshooter suggested)
- Bearing Preload Off (@Eicca suggested)
- Dry spindle bushings (@RAYJON suggested)
- Bad axle pinion bearings (@RAYJON suggested)
- ?
Could an out of balance drive shaft cause this (specifically at only high speed)? Or what ever causes are there that I can check before putting this all together.
Edit: I'll continue to add causes as they come in to keep the first post full of info for others.
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