Manual transmission car jump file failure

Manual transmission car jump file failure Transmission jump file failure phenomenon: the car is moving the shift lever automatically jump back to the neutral position. This phenomenon occurred in the high-speed, sudden changes in load or vehicle subject to severe vibration, and most are in high gear jump file.
Transmission jump file causes for the failure:
l, as gear, gear synchronizer cone sets or excessive tooth wear, tooth length along the direction of the formation of shape, when they produce a mating axial thrust, but also by vibration at work, shaking, speed changes the inertia effect, forcing the engagement of gear torn off along the axis;
2, the transmission and bending, wear and tear over very, screw loosening or deformation of the shift lever, so the gear does not engage;
3, self-locking device worn Songkuang, less elastic or spring break, resulting in lack of strength lock, so that speed can not be reliably cross-axis positioning;
4 sets of gear tooth wear off or even along the length direction of the ground into a conical teeth;
5, shaft and bearings badly worn, the axial clearance is too large, or the first and second shaft and intermediate shaft is not parallel to the meshing gear does not jump up and down swings caused by file;
6 tooth spline shaft and sliding gear splines worn off even;
7, the second shaft spline tooth wear distorted or key transition, caused by loose nut or shaft drive gear before and after the channeling;
8, synchronizer latch loose, fall apart or synchronizer tooth bonding length has serious wear and tear;
9, the transmission is not firmly fixed.
Jump to determine the transmission failure and exclusion file:
l, find a file in the jump file, the file will shift lever substitutions, then remove the cover to see the transmission gear mesh, such as meshing well, check the transmission cross shaft lock mechanism;
2, hand to promote the jump test file transmission fork positioning device, such as poor positioning, the need to remove the transmission cross-axis positioning of the ball and spring testing, such as the spring is too soft or broken should be replaced. If the transmission cross shaft groove wear and tear should be repaired or replaced even before;
3, check the gears meshing, such as the gear is not fully engaged, the gear by hand to promote the jump file or set of teeth meshing correctly, you should check whether the shift fork bent or worn over very well shift fork screws are loose, the fork end and gear cast slot gap is too large. If the speed should be corrected fork bending; as a result of wear and sliding speed gear fork bottom slot over Songkuang repair should be removed;
4, such as variable speed well, and can set the proper gear or gear teeth, gear should be checked for wear into a cone, such as badly worn should be replaced;
5, check the bearing and shaft wear, severe wear and tear such as shaft, bearings Songkuang or speed axial movement along the axis, should be removed to repair or replace;
6, check the synchronizer work, if any fault should be repaired or replaced;
7, check the transmission mounting bolts, such as loose should be tightened.