Speedometer cable

As previously stated, new cable, new housing and well lubed. Cable is good with no kinks or sharp bends in housing. When gear was removed teeth appeared good and is indexed properly. I will try to see if input on instrument needs cleaned ,but doubt it , as it appeared very clean on end of old cable when removed. Is it possible that stop collar is not placed properly and end of cable at instrument needs shortened? Under dash, housing seems to have some side force applied to it but can see no other way to get it better aligned. Can any lubricant be applied at input to instrument or could that be detrimental. Bounce in speedometer quits completely at about 60 mph and above. This has me completely confused but will try your suggestions that have not already been applied. More ideas welcome. THANK YOU.
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