I had a similar problem with my shift lever . The lever return spring had snapped! A new spring helped matters but still lots of slop due to a steel mounting bolt incorporating the shouldered bush wearing the alloy of the shift lever . I came up with 3 solutions, the first being replacing the shift lever ( expensive ) , the second being , having the hole in the shift lever plugged and redrilled for a snug fit ( slightly less expensive ) , or the cheapest solution by far was to buy a tin of shim stock ! won't cure it completely , as the shift lever wears oval due to the limited throw up and down of the lever , but Definately improves matters until the time / or money comes to address the problem permanently !