Jualex1362 a écrit :
Ça m’arrive toujours lorsque je suis en 6eme, jamais à des rapports inférieurs.
Et vers quelle vitesse. Toujours la même. Bizarre que tu n'es jamais rien eu en 5 ème ?
Le basique : Équilibrage des roues fait SOIGNEUSEMENT ?
Un DW est généralement déclenché par une petite déformation de la route (petit nid de poule, déformation chaussée...) est-ce le cas ?
Le réponse d'un ingénieur JEEP sur la rehausse
Sinon tu as la réponse d'un ingénieur JEEP ici :
https://www.allpar.com/SUVs/jeep/death-wobble.html
Ou tu liras (pour faire simple les idiots qui surmonte le JK ou change les pneus font 2 choses mauvaises et seront sélectionnés par Darwin....)
Attention je ne dis pas qu'une surmonte soit mauvais MAIS il faut que tout change TOUTE la chaîne cinématique derrière....d'où le recourt à un vrai PRO....et seulement dans ce cas tu auras un bénéfice et quelque chose de mieux que le stock...si tu te contente de rehausser simplement tu as tout faux...
Once you change to a larger overall diameter tire, you do two things — both bad. You increase the rotating mass, increasing the gyroscopic effect of the tire on handling; and you change the theoretical length of the arm resisting the toe change from ground induced inputs.
This is the cause of the steering induced effects. Other issues arise from the changes in the geometry when a panhard rod is added to the system, which causes an over-constraint of the suspension geometry (which is why the proper name of the Jeep “Quadracoil” suspension is “5 link, over constrained, link-coil” suspension.)
In a properly designed XJ suspension, the motion of the draglink (of the Haltenberger type) and the panhard rod is supposed to be a parallelogram...but in stock form, it is not, so raising the vehicle even 1 inch worsens the “fight” between the track bar (panhard rod) and the draglink, causing the tires to steer instead of the driver.
In stock form, these effects are minimized. Lift it and you will have a problem, the only change is when and under what conditions.
Idiots that simply bolt on a 4” lift kit will be selected by Darwin...the only question is when. In general, people designing these lift kits do not know what they are doing. There was one exception, Nth Degree, but they went out of business — from what I heard because their kits, which minimized these problems, were too expensive.