- Feb 17, 2006
- Country smells, England
- '01 Disco 2 V8, '90 Disco 1, '05 Smart Roadster
It folded back against the cage and bent, seemed to bend the hinges too but I'm still not really sure how. Amazingly the bonnet pins still lined up. Sorry about the potato photos, it started raining so I rushed.
As part of the gearbox change I swapped the propshafts with known good ones to take away the chance that they were imbalanced, I have since removed the housing from the disc handbrake to ensure that wasn't causing it. The power steering box has been changed along with the coupling shaft (the old one had play in the UJs), with that the drag link was changed with different ball joints. These are all parts that were previously on Keely with no issues.So what all have you done to try to kill the death wobble?
It already has the castor correction parts to counter the lift, I had the same on Keely so am very familiar with them and didn't experience issues with that truck. Polybushes are all good too. The steering being out of whack is a possibility, it's missing the steering damper as I still need to get a bracket to re-fit it but I really didn't feel much with the big tyres, maybe the width and friction on the road just eliminated the wobble before it happened. I guess excessive toe in or out mixed with the lift could be a recipe for disaster. Will investigate.Proper steering geometry is the cure! My Jeep exhibited really bad death wobble because the GDPO bubba'ed it when lifting and used all existing hardware. As a result, the front axle was in the wrong place and all the steering link angles were wrong. I bought an adjustable track bar and adjustable control arms and had them properly set by a offroad specialty shop that does nothing by offroad 4x4s and voila, my Jeep will do 75mph all day every day no problem. I even once hit 80mph, but that becomes terrifying for a totally different reason.
Go through every bit of your front end. Maybe you'll find a point where something was taken and drilled back into the wrong spot instead of relocating it properly.
The US experience is that most of the time when a Disco starts having death wobble and it isn't alignment or wheel/tire balance/belt shift related, it's the swivel pins. The swivel pins don't 'seem' to be bad and pass a shake or pry test. However, that turns out to be a false sense of security. Usually the swivel pins are indeed worn out; this only comes to light when you take the suspension down to the point where you can check the swivel pin preload. This requires a special tool on the ABS trucks and a spring scale on the non-ABS trucks. You will likely find the preload is near zero, indicating that they're worn out (because nobody ever adjusts them like they're supposed to be and by the time you get to them they're beyond the point of adjustability) and you'll need to rebuild/replace the pins.As part of the gearbox change I swapped the propshafts with known good ones to take away the chance that they were imbalanced, I have since removed the housing from the disc handbrake to ensure that wasn't causing it. The power steering box has been changed along with the coupling shaft (the old one had play in the UJs), with that the drag link was changed with different ball joints. These are all parts that were previously on Keely with no issues.
I've checked for bearing play on all four wheels and swivel play on the front two, I didn't find anything out of the ordinary. The wobble is intermittent over 40mph and varies in amplitude, if it isn't wobbling there is no effect under braking so no warped discs and braking doesn't stop the wobble so no loose bolts on the disc. All drive flanges are tight.