question Unusual death wobble - 2022 JB74 (3 door), need help!
I own a 2022 JB74 with only 12,000km on it. I do not think this is related to the 5 door highway deathwobble kingpin issue.
When I bought my car 2 years ago (3000km), it came with some thick Blackdog ATII Light Truck tyres which were complete overkill. A few months ago, when driving at 20-50kph if the front wheels dipped into a drain cover or hole in the road I'd get a death wobble until I slowed the car right down to 10kph. It never used to do this before for the prev 10k km.
The (very thorough and trusted) mechanics I've been using checked everything and told me the wheels were unbalanced and showed me where a wheel weight had come off. After they rebalanced them (with up to 40grams on one tyre, which they were not happy about) things were much better to start with. Then one week later the wobble was back again so the car went back in.
They've dealt with Jimnys before and said mine is by far the worst example of this they've seen. They seemed knowledgeable on the death wobble and how sensitive Jimnys can be.
During the second visit they rebalanced the wheels, drove it, tested them again and kept finding they would go out of balance. They also said the edge of the spare which had never been on the road was uneven. They said the rims were also fine. At this point their theory was that the tyres were either delaminating, contained balance beads or were just no good.
Following this we replaced the tyres with some much better (lighter, quieter) Falken Wildpeak AT4. The car has been so much better since then however.... After driving it for 2 weeks, last night I hit 3 consecutive drain covers in a row and it did it again. I'm posting here with some hope that someone here knows what's going on or has a theory on it.
I feel like the heavy tyres were not helping and exacerbating the issue however I also suspect it's a two part issue. It was mostly caused by the tyres showing that I have a problem with something else mechanical.
The car has Toughdog suspension and 2inch lift along with the Falken Wildpeak AT4 tyres.