| Author | Message | ||
     GRAHAM CAMPBELL (Tripod) New Member Username: Tripod Post Number: 1 Registered: 04-2004 |
hi im new to the disco web and this is my first discovery it is a 3.5 v8 1990,i have just put it through its mot ,it needed new radius arm bushes,but when i drive it at around 70 mph the steering wheel seriously vibrates quite scary ,if you let your feet off the accelerator the car slows down to around 50mph and the vibration goes away,i dont think its wheel balancing for the vibration is so much worse than that,i also fitted new front shocks ,and steering damper,the disco has only done 57000 miles,please can someone help | ||
| Paul D. Morgan (V22guy) Dweb Lounge Member Username: V22guy Post Number: 2662 Registered: 02-2002 |
But did you have your wheel balancing checked as well as an alignment? I am not sure how far the MOT gets into your vehicle, but I would rule out the simple stuff before replacing more parts. | ||
| RAY HARRISON (Rahar) New Member Username: Rahar Post Number: 5 Registered: 04-2004 |
Graham, I had a same/similar problem. Turned out that it was CV joints. Disco wanted to steer where it wanted to and was quite scary. A few corners I turned were quite interesting!! You can pick this by the sound the truck makes when turning. If you hear a "clicking" noise then it is CV's. I had both of them done and all probs went away. My Disco is the same year as yours. | ||
| Randy Maynard (Rans) Senior Member Username: Rans Post Number: 790 Registered: 08-2002 |
I agree with Paul, it could be wheel balance, but even though this might seem silly, check how tight your wheel lugs are in front. That has been an issue on occasion, especially if the wheels had recently been pulled. Also, check your steering damper (1990 D1 has one I assume?) The last thing might be the front drive shaft being unbalanced? | ||
| Tyler VanHorn (Rashenup) New Member Username: Rashenup Post Number: 4 Registered: 02-2004 |
also another common problem that creeps up with the discovery and steering is the swivel pin preload. http://www.sf.hiof.no/~frodehaa/swivelpinpreload.htm may or may not be the problem, but it's something to check out. | ||
| Mike Rupp (Mike_rupp) Senior Member Username: Mike_rupp Post Number: 345 Registered: 02-2002 |
Sounds like the "death wobble". Things to check: Radius arm bushings Panhard rod bushings swivel pin preload Tie rod ends Wheel bearings The steering damper only hides an underlying problem. If everything is tight, you can drive without a steering damper. | ||
| gil stevens (Gil) Senior Member Username: Gil Post Number: 436 Registered: 02-2002 |
I had the same issue in my 1990 county, changed damper, bushes, etc.. it turned out to be the swivel preloads.. | ||
| Jesse Lessard (Jlessard) Member Username: Jlessard Post Number: 112 Registered: 10-2002 |
Checking the swivel pin preload sounds like something I should do on my truck since I have a simular vibes. Reading the writeup that Tyler posted was most helpfull, but I just had a question before I go try and mess with it this weekend. What exactly is a "Spring balance scale"? and how do I use it to determin if I have the shims right? Thanks, Jesse | ||
| Sergei Rodionov (Uzbad) Senior Member Username: Uzbad Post Number: 457 Registered: 08-2003 |
Jesse i am about to go on same job  Scale that mentioned there is just usual spring scale, one that you using to measure how much potatoes you got at the farmer's market You just hook ti to the loops where tie rod ends going to and pull. if you got reading less than 6kg - your steering is as toast as mine However i dont really see how vibrations can be produced by lack of proper preload. I mean steering should feel rather loose, but vibrations from it? Inquiring mind want to know | ||
| Jesse Lessard (Jlessard) Member Username: Jlessard Post Number: 113 Registered: 10-2002 |
Ahh well thats pretty simple, I knew how to use It would be easy since the writeup didn't bother mentioning how. Thanks Seregei I have vibrations, and my steering feals kind of loose. Its been like this for a long time now and it would feal so nice to have to drive normally again. | ||
| Sergei Rodionov (Uzbad) Senior Member Username: Uzbad Post Number: 459 Registered: 08-2003 |
Hehe.. Who would think that all them physics "practical lessons" @ 6th grade in school actually would come handy ever We used such scales to do lots of them classical mechanics experiments. | ||
| GRAHAM CAMPBELL (Tripod) New Member Username: Tripod Post Number: 2 Registered: 04-2004 |
hi again i would just like to say thanks to all who responded to my plea,as soon as i read about the preload i jacked it up etc to check it, as soon as unbolted the track rod end the hub basically fell to one side on its own weight there was zero tolerance ,i adjusted the shims etc as tyler vanhorn described ,and it worked a treat ,its like driving a different vehicle,thanks again for the help | ||
| Sergei Rodionov (Uzbad) Senior Member Username: Uzbad Post Number: 461 Registered: 08-2003 |
Damn you people. You made me order them swivel pins and shims.. Just when i thought to not buy any new stuff for like month.. *sighs* | ||
| Sergei Rodionov (Uzbad) Senior Member Username: Uzbad Post Number: 479 Registered: 08-2003 |
Well it was lovely. One wheel was 2.5kg and another was 3.8kg.. Geez. Took about hour (from start to finish) of fiddling with each wheel to get things withing 6.4-7kg range, but it feels much better now. Thanks y'all | ||
| Jesse Lessard (Jlessard) Member Username: Jlessard Post Number: 114 Registered: 10-2002 |
An hour isn't to bad, I was going to do mine last Saturday but the weather turned cold and rainy. Sounds like its something to try after work though. | ||
| Brad Ashe (Vodkaman) Member Username: Vodkaman Post Number: 101 Registered: 10-2003 |
In the write up it did not mention what the torque should be on the swivel pin nut. What is the torque in Foot lbs for this nut? Thanks | ||
| Sergei Rodionov (Uzbad) Senior Member Username: Uzbad Post Number: 483 Registered: 08-2003 |
Its actually mentioned there. 78Nms |
