Cruise control on down a hill it cuts out out for a millisecond

When we drive the car and put on the cruise control the car going down a hill,

it feels like the car is hesitating for a few seconds and then it works normal then it does it again and again!

We changed the relay already, we have to of the same cars same year and one does it the other does not. the only difference between the cars is one is a auto and thats the problem one the other is a standard.



if any one knows we would like to thank you now for your help!

I assumed it does that to try and maintain the set speed since the car would try and roll faster as it goes down the hill.
I have noticed it in my 5 speed but not in the 01M