Speed controle

Anybody have any idea where or what would make my speed controle work at 40 mph and below but not above. Anytime is set it at any speed higher then this it wont work at all. It worked fine all along, then stoped. any ideas 2006 HC

Thanks

Could be an issue with the tone rings on each wheel. If tire sizes aren't equal, Tempomat will act up like that.

I think you are right on the money, I put one size smaller studded winter tire on the front. As a test to see it would increase steering grip on back roads it did do that. I did not use speed control during this time now that I am back out on highway use with sprinter I noticed issue with the speed control not acting correctly. New tires are going on this week I will respond back with results.

Thanks for all you do