Mark Posted August 8, 2007 Share Posted August 8, 2007 Knowledgeable People When driving home in the jimmy after picking it up I experienced a "wobble" at approximately 40 mph, it was though the whole of the cab was twisting from side to side (quite violent) and as soon as I slowed down it went, now there was nothing coming through the steering wheel to indicate that the wheels are not balanced and it seemed as I went over a bump it started BUT not every time, has anyone had this with theirs, is it something to do with tyre pressures or dampers etc?? or would the weight of the workshop body on the back have something to do with it. If someone has any suggestions please let me know, as at 35 mph its nice but slow. Thanks Quote Link to comment Share on other sites More sharing options...
Joris Posted August 8, 2007 Share Posted August 8, 2007 I've got this with my Dodge too, somewhere between 35 and 40mph it starts, if I then slow down or go faster it's gone again. Usually it's wrong tirepressure or unbalanced wheels. Quote Link to comment Share on other sites More sharing options...
Great War truck Posted August 8, 2007 Share Posted August 8, 2007 Yes it has happened to me and is very disconcerting. Try tyre pressure first. It is the easiest found and easiest resolved. Tim (too) Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted August 8, 2007 Share Posted August 8, 2007 Had this with jimmy just after putting a pair of NOS Uniroyals on the front, at 35mph. I had a job to hold on! Tyres pressures were ok so had wheels balanced - one was way, way out. They have to use the stick-on flat weights but a little drab and you don't notice it. Instant cure :-) :-) :-) :banana: :banana: Or try distributing the beer cans evenly across both sides.......... Quote Link to comment Share on other sites More sharing options...
Jack Posted August 8, 2007 Share Posted August 8, 2007 I have read about this problem many times but I have never had it myself. (no wheel gags please) what tires have you on there Mark? Just a matter interest. What ever it is, it can be easily fixed - that is the nice thing about GMC's. Fellow brother. Jack. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 8, 2007 Author Share Posted August 8, 2007 I have road tyres not bargrips, brand new. Fellow Brother Quote Link to comment Share on other sites More sharing options...
TooTallMike Posted August 8, 2007 Share Posted August 8, 2007 If you don't fancy paying for balancing you could just try swapping tyres around and see how the problem changes or if it goes away. Just keep an eye on the rolling circumferences on the rears and don't let them get too far apart. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 8, 2007 Author Share Posted August 8, 2007 Ok Mike thanks, what should the tyre pressures be anyway, will check this Quote Link to comment Share on other sites More sharing options...
Bodge Deep Posted August 8, 2007 Share Posted August 8, 2007 More than likely that the rear wheel circumferences are too far out so the back axles fight with oneanother... my mates Jimmy did that quite spectacularly... till he swapped the tyres round :dunno: Quote Link to comment Share on other sites More sharing options...
Jack Posted August 8, 2007 Share Posted August 8, 2007 Ok Mike thanks, what should the tyre pressures be anyway, will check this 55psi Fellow Brother. Jack Quote Link to comment Share on other sites More sharing options...
Grasshopper Posted August 8, 2007 Share Posted August 8, 2007 I volunteer Mikes services to swap your wheels around at Redhill. He needs to kept constantly occupied. I will happily supervise. :beer: Quote Link to comment Share on other sites More sharing options...
Markheliops Posted August 8, 2007 Share Posted August 8, 2007 I second the above - Mark can make the tea - whilst Mike changes the wheels. :-D Vince can supervise and I can supervise Vince - (management being my area of expertise). Mark, if you park the Jimmy in the sun, chances are Mikes knees will get some colour. :goodidea: See ya there. Markheliops Quote Link to comment Share on other sites More sharing options...
TooTallMike Posted August 8, 2007 Share Posted August 8, 2007 I second the above - Mark can make the tea - whilst Mike changes the wheels. :-D Vince can supervise and I can supervise Vince - (management being my area of expertise). Mark, if you park the Jimmy in the sun, chances are Mikes knees will get some colour. :goodidea: See ya there. Markheliops :argh: Quote Link to comment Share on other sites More sharing options...
Mark Posted August 8, 2007 Author Share Posted August 8, 2007 Ok if I change the wheels around what is the sequence, just the back ones or all of them, if they are measured what is the max difference and where do I put them. Quote Link to comment Share on other sites More sharing options...
Enigma Posted August 8, 2007 Share Posted August 8, 2007 Are all wheelnuts fastened? Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted August 8, 2007 Share Posted August 8, 2007 Mark, This could be a balance issue. I know a couple of IMPS members who are GMC owners near Whitstable, they had the tyre companies insert a balancing medium in the tubes. It is very fine beads which do not clog, as soon as the wheel turns they spread out and self-balance. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 9, 2007 Author Share Posted August 9, 2007 Mark, This could be a balance issue. I know a couple of IMPS members who are GMC owners near Whitstable, they had the tyre companies insert a balancing medium in the tubes. It is very fine beads which do not clog, as soon as the wheel turns they spread out and self-balance. Thanks, have you got an address for this please K :-D Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted August 9, 2007 Share Posted August 9, 2007 Thanks, have you got an address for this please K :-D Mark, I will PM you, regarding this. Quote Link to comment Share on other sites More sharing options...
Jack Posted August 9, 2007 Share Posted August 9, 2007 I remember that I had this problem with my Toyota Hilux and it had shed loads of mud stuck to the inner rim where I had been going through the woodlands - washed the mud off - end of problem. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 9, 2007 Author Share Posted August 9, 2007 Jack The truck is as clean as a pin, not bling, pin :-D but thanks anyway Quote Link to comment Share on other sites More sharing options...
demon Posted August 10, 2007 Share Posted August 10, 2007 I had a similar problem on my jeep when I first got it :help:. Everyone said that's normal it's just a bit of wheel shimmy. Trust what I had was not normal in anyway shape of form :eek2: :eek2:. I would hit about 40mph and the steering would go wild :banghead: , the wheels would bounce off the ground twisting the chassis, the only way to stop it was to slow down. I also had it over bumps, not every time but enough to notice it. I tried tyre pressures, wheel balancing and swapping the wheels around and nothing cured it :azn: I then looked at the steering, and I found my problem :tup:. I had a seized tie rod on closest to the wheel. I changed that, then I could go flat out in my jeep with no wobbles or shakes :yay: :yay:. My two pence worth for you :whistle:. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 10, 2007 Author Share Posted August 10, 2007 Demon That is exactly my problem but explained better, but did your steering feel free driving at 30 mph or was it stiff to turn. Thanks will be looking at the problem at the weekend. :-D Cheers Quote Link to comment Share on other sites More sharing options...
demon Posted August 10, 2007 Share Posted August 10, 2007 The steering felt fine hence I never even thought about it. It was only by getting hold of the tie rod with both hands and trying to twist it back and forth that I found that one end was not moving. The only time I had a problem was at speed, there was obviously not enough movement to allow the wheel it's natural movement whilst driving. I'm not an expert but this is what I discovered with mine. Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted August 11, 2007 Share Posted August 11, 2007 Just learned that the new water-based tyre sealers act in a similar way to the balancing medium Kewelde described. But DO NOT USE both, or you end up with lots of hard marbles which keep rolling around after the wheel has stopped!!! I still can't see how this method of balancing would work in all cases, but apparently it does.......... I'm told ATS promote the balancing medium. Quote Link to comment Share on other sites More sharing options...
Mark Posted August 11, 2007 Author Share Posted August 11, 2007 Thanks :-D Quote Link to comment Share on other sites More sharing options...
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